iOS Player settings

This page details the Player settings specific to iOS. For a description of general Player settings that apply to all platforms, see Player - General settings.

You can find documentation for the properties in the following sections:

• Icon
• Resolution and Presentation
• Splash Image
• Debugging and crash reporting
• Other Settings

Icon

Use the Icon settings to customize the branding for your application on the Apple Store.

You can upload and assign the following types of custom icons for each iOS device:

Setting	Description
Application icons	The main device icons for your application.
Spotlight icons	Icons that appears in spotlight search results.
Settings icons	Icons that appears in the device’s main settings page.
Notification icons	Icons that display in notifications sent from your application.
Marketing icons	Icons to use in the Apple App Store.

Icon files can be any image file supported by Unity, in the form of a Texture2D asset. If an icon Texture is missing, Unity scales the icon Texture with the nearest size, with a preference towards using larger Textures.

Resolution and presentation

Use the Resolution and Presentation section to customize aspects of the screen’s appearance.

These settings are split into the following categories:

• Resolution Scaling
• Orientation
• Allowed Orientations for Auto Rotation
• Multitasking Support
• Status Bar

Resolution Scaling

Use the Resolution Scaling Mode setting to set the scaling to be equal to or below the native screen resolution:

Setting	Function
Disabled	Scaling doesn’t apply and the application renders to its native screen resolution.
FixedDPI	When you select this value, the Target DPI property appears. Use the Target DPI property to set the target DPI of the game screen. Unity downscales the game screen to match this setting if the device’s native screen DPI is higher than this value. This helps you optimize performance and battery life. You can also use it to target a specific DPI setting. Unity calculates the scale as min(Target DPI * Factor / Screen DPI, 1). The Factor uses the Resolution Scaling Fixed DPI Factor value you enter in the Quality settings.
Reset resolution on window resize	Indicates whether to set the screen resolution to the new native window size when the native window size changes. If you set Resolution Scaling Mode to Fixed DPI, Unity recalculates the resolution based on Fixed DPI property.

Orientation

Choose the game’s screen orientation from the Default Orientation drop-down menu. The default setting is Auto Rotation. If selected, this setting causes the screen to rotate with device orientation.

Select a different setting to determine a fixed location for where the Home button appears on the screen:

Setting	Home button position
Portrait	Bottom
Portrait Upside Down	Top
Landscape Left	Right side
Landscape Right	Left side.
Auto Rotation	Screen orientation changes with device orientation. This is the default.

Note: The Default Orientation setting applies to both iOS and Android devices.

When you select Auto Rotation as the Default Orientation, these settings appear:

Setting	Function
Use Animated Autorotation	If you enable this check box, when the user rotates the device, screen rotation uses an animated transition. Otherwise, screen rotation changes instantly.
Allowed Orientations for Auto Rotation	Auto Rotation changes screen orientation to match the device. You might want to limit the screen orientations allowed (for example, locking a device to landscape). Enable each orientation you want to allow by checking its box in this section.

Multitasking Support

Enable the Requires Fullscreen option if your application needs to run in full screen mode.

Status Bar

Use the Status Bar section to specify parameters related to the iOS status bar.

Setting	Function
Status Bar Hidden	Enable this option to hide the status bar when your application launches.
Status Bar Style	Define the style of the status bar when the application launches. The options are Default and Light.
Disable Depth and Stencil	Enable this option to disable the depth and stencil buffers.
Render Over Native UI	Enable this option to force your app to render on top of the native iOS UI.
Show Loading Indicator	Select how the loading indicator appears. The options are White Large, White, and Gray.

Splash image

Use the Splash Image section to customize your app’s splash image for different iOS-supported devices.

The Virtual RealityVirtual Reality (VR) immerses users in an artificial 3D world of realistic images and sounds, using a headset and motion tracking. More info
See in Glossary Splash Image setting, located above the common Splash Screen settings, allows you to select a custom splash image for Virtual Reality displays.

Custom storyboards

When you select the Custom Storyboard option in the Launch screen type dropdown for either iPhone or iPad, the Custom Storyboard button appears.

Click the Custom Storyboard button to select a storyboard to display when your game starts up on the device. For your storyboard to appear here, you must first create the storyboard in Xcode and copy it to your Project. For more information, see Apple developer documentation about storyboards, scenes, and connections.

When you disable the Use Storyboard for Launch Screen checkbox, you can implement splash images with one of these methods:

If you don’t use custom storyboards, you can use Unity’s built-in launch screens to implement splash images.

Launch Screens

A launch screen is a Storyboard file from which iOS creates a splash screen on the device. It has the following limitations:

• You can’t display different content based on device orientation for iPads.
• All iPhones support landscape launch screens, but certain iOS versions display the Landscape Left launch screen instead of the Landscape Right one due to a bug.
• Before iOS 13, it was impossible to override the root view controller for a storyboard, so the launch screen supports all orientations and ignores some UI(User Interface) Allows a user to interact with your application. Unity currently supports three UI systems. More info
  See in Glossary settings, like status bar behavior. Starting with iOS 13, launch screen is fully compliant with your app’s settings for orientation and status bar appearance.

These limitations also apply to custom storyboards.

Select the Launch screen type for iPhone and iPad in the iPhone Launch Screen and iPad Launch Screen sections:

Value		Function
Default		When you select this option, Unity adds a solid blue-black image that’s the same color as the background for Unity’s default splash screen. The image is used for both portrait and landscape orientations, and displays using aspect-fill mode.
None		Apple no longer supports Launch Images. This option exists for backwards compatibility reasons. If you select it, your project will use Unity’s default splash screen instead.
Image and background (relative size)		Displays an image in the center of the screen and fills the remaining area with a solid color.
	Portrait Image	Select an image for portrait orientation.
	Landscape Image	Select an image for landscape orientation.
	Background Color	Select a background color to fill any screen space that the image doesn’t cover.
	Fill percentage	Specify image size as a percentage of the screen size. Unity calculates image size based on the length or width of the screen, whichever one is smaller (vertical for landscape displays, horizontal for portrait ones).
Image and background (constant size)		Displays an image in the center of the screen and fills the area with a solid color. This has the same options as Image and background (relative size), except that you specify image size in points rather than as a percentage. Tip: Points and pixels aren’t the same. A pixel (px) is a single dot in your image. A point (pt) is a unit of length that measures 1/72th of an inch. Pixel sizes are relative to the screen size and resolution, while point sizes are the size on any screen. For more information, see W3C guidance on size units.
Custom XIB		When you select this option, the Custom XIB button appears. Click the button to select a custom XIB file to use as a loading screen.
Custom Storyboard		When you select this option, the Custom Storyboard button appears. Click the button to select a custom Storyboard file to use as a loading screen.

Note: With a Unity Personal subscription, the Unity Splash Screen displays as soon as the engine initializes, in addition to your chosen splash screen.

Debugging and crash reporting

Use the Debugging and crash reporting settings to gather data about your app’s performance and troubleshoot crashes.

Setting	Function
Enable Internal Profiler (Deprecated)	This feature is deprecated and will be retired in a future version of Unity. Use the Profiler window instead (menu: Window > Analytics > Profiler). The Profiler collects application performance data and prints a report to the console. The report contains the number of milliseconds each Unity subsystem takes to execute on each frame, averaged across 30 frames.
On .Net UnhandledException	Select the action Unity takes when a .NET unhandled exception occurs. The options are Crash (the app crashes and generates a crash report, which users can submit to iTunes and developers can use to troubleshoot the crash), or Silent Exit (the application exits with no errors and doesn’t generate a crash report).
Log Obj-C Uncaught Exceptions	When you enable this action, Unity prints Objective-C Uncaught Exception information to the console.
Enable Crash Report API	Enables a custom crash reporter to capture crashes. You can use scripts to access crash logs via the CrashReport API.

Other settings

You can configure a range of Player settingsSettings that let you set various player-specific options for the final game built by Unity. More info
See in Glossary in the Other Settings section. These options are organized into the following groups:

• Rendering
• Identification
• Configuration
• Shader Variant Loading
• Optimization
• Logging
• Legacy

Rendering

Use these settings to customize how Unity renders your application for the iOS platform.

Setting		Function
Color Space	Choose which color space to use for rendering. For more information, refer to Linear rendering overview.
	Gamma	Gamma color space is typically used for calculating lighting on older hardware restricted to 8 bits per channel for the framebuffer format. Even though monitors today are digital, they might still take a gamma-encoded signal as input.
	Linear	Linear color space rendering gives more precise results. When you select to work in linear color space, the Editor defaults to using sRGB sampling. If your Textures are in linear color space, you need to work in linear color space and deactivate sRGB sampling for each Texture.
Color Gamut	You can add or remove color gamuts to use for rendering. Click the plus (+) icon to see a list of available gamuts. A color gamut defines a possible range of colors available for a given device (such as a monitor or screen). The sRGB gamut is the default (and required) gamut.
Multithreaded Rendering	Enable this option to move graphics API calls from Unity’s main thread to a separate worker thread. This can help to improve performance in applications that have high CPU usage on the main thread.
Static Batching	Enable this option to use static batchingA technique Unity uses to draw GameObjects on the screen that combines static (non-moving) GameObjects into big Meshes, and renders them in a faster way. More info See in Glossary.
Dynamic Batching	Use Dynamic BatchingAn automatic Unity process which attempts to render multiple meshes as if they were a single mesh for optimized graphics performance. The technique transforms all of the GameObject vertices on the CPU and groups many similar vertices together. More info See in Glossary on your build (enabled by default).. Note: Dynamic batching has no effect when a Scriptable Render Pipeline is active. This setting is visible only when the Scriptable Render Pipeline Asset Graphics setting is blank.
Sprite Batching Threshold	Controls the maximum vertex threshold used when batching.
GPU SKinning	Enable this option to use Metal GPU compute skinning, which frees up CPU resources.
Graphics Jobs (Experimental)	Enable this option to instruct Unity to offload graphics tasks (render loops) to worker threads running on other CPU cores. This is intended to reduce the time spent in Camera.Render on the main thread, which is often a bottleneck. Note: This feature is experimental. It may not deliver a performance improvement for your project, and may introduce new crashes.
Texture compression format	Choose between ASTC and PVRTC as the default texture compression format for iOS. Check the texture compression format overview for more information.
Normal Map Encoding	Choose XYZ or DXT5nm-style to set the normal map encoding. This setting affects the encoding scheme and compression format used for normal maps. DXT5nm-style normal maps are of higher quality, but more expensive to decode in shaders.
Lightmap Encoding	Defines the encoding scheme and compression format of the lightmaps. You can choose from Low Quality, Normal Quality, or High Quality
HDR Cubemap Encoding	Defines the encoding scheme and compression format of the HDR Cubemaps. You can choose from Low Quality, Normal Quality, or High Quality. For more information, refer to Lightmaps: Technical information.
Lightmap Streaming	Enable this option to use Mipmap Streaming for lightmaps. Unity applies this setting to all lightmaps when it generates them. Note: To use this setting, you must enable the Texture Streaming Quality setting.
Streaming Priority	Set the priority for all lightmaps in the Mipmap Streaming system. Unity applies this setting to all lightmaps when it generates them. Positive numbers give higher priority. Valid values range from -128 to 127.
Frame Timing Stats	Enable this option to gather CPU/GPU frame timing statistics.
Allow HDR Display Output	Activate HDR mode output when the application runs. This only works on displays that support this feature. If the display doesn’t support HDR mode, the game runs in standard mode.
Use HDR Display Output	Checks if the main display supports HDR, and if it does, swaps to HDR output when the application launches. Note: This option is only available when Allow HDR Display Output is active.
Swap Chain Bit Depth	Selects the number of bits in each color channel for swap chain buffers. You can select Bit Depth 10 or Bit Depth 16. For more information on bit depth, refer to the Scripting API page for D3DHDRDisplayBitDepth. Note: This option is only available when Use HDR Display Output is active.
	Bit Depth 10	Unity will use the R10G10B10A2 buffer format and Rec2020 primaries with ST2084 PQ encoding.
	Bit Depth 16	Unity will use the R16G16B16A16 buffer format and Rec709 primaries with linear color (no encoding).
Virtual Texturing	Enable this option to reduce GPU memory usage and texture loading times if your Scene has many high resolution textures. For more information, refer to Virtual Texturing. Note: The Unity Editor requires a restart for this setting to take effect.
Shader Precision Model	Select the default precision shaders use. For more information, refer to Use 16-bit precision in shaders.
	Platform default	Use lower precision on mobile platforms, and full precision on other platforms.
	Unified	Use lower precision if the platform supports it.
360 Stereo Capture	Indicates whether Unity can capture stereoscopic 360 images and videos.
Load/Store Action Debug Mode	Highlights undefined pixels that might cause rendering problems on mobile platforms. This affects the Unity Editor Game view, and your built application if you select Development Build in Build Settings. Refer to LoadStoreActionDebugModeSettings for more information.

Identification

Enter identifying information for your app.

Setting	Function
Override Default Bundle Identifier	Indicates whether you can manually set the bundle identifier. Note: This setting affects macOS, iOS, tvOS, and Android.
Bundle Identifier	Enter the provisioning profile of the application you are building. The basic structure of the identifier is com.CompanyName.ProductName. This structure might vary based on which country you live in, so always default to the string Apple provides to you for your Developer Account. Your ProductName is set up in your provisioning certificates. The Bundle Identifier must follow the convention com.YourCompanyName.YourProductName and must contain only alphanumeric and hyphen characters. For more information, see CFBundleIdentifier. Important: Unity automatically replaces any invalid characters you type with a hyphen. To set this property, enable Override Default Bundle Identifier.
Version	Enter the release-version-number string for the bundle (for example, 4.3.6). This value appears as CFBundleShortVersionString in the associated info.plist file. For more information, see Apple developer documentation on CFBundleShortVersionString.
BuildThe process of compiling your project into a format that is ready to run on a specific platform or platforms. More info See in Glossary	Enter the build number for this version of your app. This value appears as CFBundleVersion in the associated info.plist file. For more information, see Apple developer documentation on CFBundleVersion.
Signing Team ID	Enter your Apple Developer Team ID. You can find this on the Apple Developer website under Xcode Help. This sets the Team ID for the generated Xcode project, allowing developers to use Build and Run functionality. You must enter an Apple Developer Team ID for automatic signing of your app. For more information, see the Apple developer documentation on Creating Your Team Provisioning Profile.
Automatically Sign	Enable this option to instruct Xcode to automatically sign your build.

Configuration

• A: API configuration settings
• B: Apple-specific information
• C: Device information
• D: Variant map for app slicing
• E: Other configuration settings

API configuration settings

Property		Description
Scripting Backend	Choose the scripting backend you want to use. The scripting backend determines how Unity compiles and executes C# code in your Project.
	Mono	Compiles C# code into .NET Common Intermediate Language (CIL) and executes that CIL using a Common Language Runtime. For more information, refer to MonoA scripting backend used in Unity. More info See in Glossary.
	IL2CPP	Compiles C# code into CIL, converts the CIL to C++ and then compiles that C++ into native machine code, which executes directly at runtime. For more information, refer to IL2CPPA Unity-developed scripting back-end which you can use as an alternative to Mono when building projects for some platforms. More info See in Glossary.
API Compatibility Level	Choose which .NET APIs you can use in your project. This setting can affect compatibility with third-party libraries. However, it has no effect on Editor-specific code (code in an Editor directory, or within an Editor-specific Assembly Definition). Tip: If you are having problems with a third-party assembly, you can try the suggestion in the API Compatibility Level section below.
	.Net Framework	Compatible with the .NET Framework 4 (which includes everything in the .NET Standard 2.0 profile plus additional APIs). Choose this option when using libraries that access APIs not included in .NET Standard 2.0. Produces larger builds and any additional APIs available aren’t necessarily supported on all platforms. Refer to Referencing additional class library assemblies for more information.
	.Net Standard 2.1	Produces smaller builds and has full cross-platform support.
IL2CPP Code Generation		Defines how Unity manages IL2CPP code generation. This option is only available if you use the IL2CPP scripting backend.
C++ Compiler Configuration	Choose the C++ compiler configuration used when compiling IL2CPP generated code.
	Debug	Debug configuration turns off all optimizations, which makes the code quicker to build but slower to run.
	Release	Release configuration enables optimizations, so the compiled code runs faster and the binary size is smaller but it takes longer to compile.
	Master	Master configuration enables all possible optimizations, squeezing every bit of performance possible. For instance, on platforms that use the MSVC++ compiler, this option enables link-time code generation. Compiling code using this configuration can take significantly longer than it does using the Release configuration. Unity recommends building the shipping version of your game using the Master configuration if the increase in build time is acceptable.
IL2CPP Stacktrace Information	Choose the information to include in a stack trace. For further details on the information types, refer to Managed stack traces with IL2CPP.
	Method Name	Include each managed method in the stack trace.
	Method Name, File Name, and Line Number	Include each managed method with file and line number information in the stack trace. Note: Using this option can increase both the build time and final size of the built program.
Use incremental GC	Uses the incremental garbage collector, which spreads garbage collection over several frames to reduce garbage collection-related spikes in frame duration. For more information, refer to Automatic Memory Management.

API Compatibility Level

You can choose your mono API compatibility level for all targets. Sometimes a third-party .NET library uses functionality that is outside of your .NET compatibility level. If you’re on Windows, you can use the third-party software ILSpy to understand what’s happening and how to fix it. Follow these steps:

1. Install ILSpy for Windows.
2. Drag the .NET assemblies for the API compatibility level that you are having issues with into ILSpy. You can find these under Frameworks/Mono/lib/mono/YOURSUBSET/.
3. Drag in your third-party assembly.
4. Right-click your third-party assembly and select Analyze.
5. In the analysis report, inspect the Depends on section. Anything that the third-party assembly depends on, but that’s not available in the .NET compatibility level of your choice, is highlighted in red.

Apple-specific information

Setting	Function
Allow downloads over HTTP	Indicates whether to allow downloading content over HTTP. The options are Not allowed, Allowed in Development builds only, and Always allowed. The default option is Not allowed due to the recommended protocol being HTTPS, which is more secure.
Camera Usage Description	Enter the reason for accessing the camera on the device.
Microphone Usage Description	Enter the reason for accessing the microphone on the device.
Location Usage Description	Enter the reason for accessing the location of the device.
Use On-Demand Resources	Use on-demand resources and enable Variant map for app slicing.
Accelerometer Frequency	Choose how often to sample the accelerometer. Use a lower frequency for better performance. If your app doesn’t use the accelerometer, select Disabled.
Mute Other Audio Sources	Enable this option if you want your Unity application to stop Audio from applications running in the background. Otherwise, Audio from background applications continues to play alongside your Unity application.
Prepare iOS for Recording	Enable this option to initialize the microphone recording APIs. This lowers recording latency, but it also re-routes iPhone audio output via earphones.
Force iOS Speakers when Recording	Enable this option to send the phone’s audio output through the internal speakers, even when headphones are plugged in and recording.
Requires Persistent WiFi	Enable this option to require a Wi-Fi connection. This maintains the active Wi-Fi connection while the app is running.
Supported URL schemes	A list of supported URL schemes. To add new schemes, increase the value of the Size property, then set a reference to the Asset to load in the new Element box that appears.

Device information

Setting		Function
Target Device		Select which devices the app targets. The options are iPhone Only, iPad Only, and iPhone + iPad.
Target SDK		Select which SDK the app targets. The options are Device SDK and Simulator SDK. Note: Be sure to select the correct SDK. For example, if you select the Device SDK in Unity and target the Simulator in Xcode, your build will fail.
Target minimum iOS Version		Select the minimum version of iOS that the app works on.
Enable ProMotion Support		Enable this option to allow high frequency refresh rates (120 Hz) on ProMotion displays. This might cause your app to use more battery power.
Requires ARKit support		Enable this option to restrict the app to iPhone 6s/iOS 11 or newer devices when you publish it to the App Store.
Automatically add capabilities		Generate an entitlements.plist file and add capabilities for Game Center if detected in your project. Disable this setting if you intend to sign your app with an enterprise certificate or use a wildcard bundle identifier.
Defer system gestures on edges		Select one or more edges that users must swipe twice to enact system gestures. The options are Top Edge, Left Edge, Bottom Edge, and Right Edge
Hide home button on iPhone X		Enable this option to hide the home button on iPhone X devices when the app is running.
Render Extra Frame on Pause		Enable this option to issue an additional frame after the frame when the app is paused. This allows your app to display graphics that indicate the paused state when the app goes into the background.
Enable Custom Background Behaviors		Select what the app is allowed to do when the user presses the home button to send the app to the background. For an example, refer to the BackgroundFetch GitHub project. The options are: - Audio, AirPlay, PiP - Location updates - Voice over IP - Newsstand downloads - External accessory communication - Uses Bluetooth LE accessories - Act as a Bluetooth LE accessory - Background fetch - Remote notifications

Variant map for app slicing

Expand the Variant map for app slicing section to see the list of variant names configured in scripting. For more information on variants, see App slicing.

Note: If you don’t see the section, make sure the Use on Demand Resource property is enabled.

You can add and remove new variants with the plus (+) and minus (-) icons. You can also select a variant from the list and see or modify its settings under Variant settings. For any of these settings except Variant name, if you choose Custom value, an additional property appears underneath where you can enter your own value to use:

Setting	Function
Variant name	Displays the name of the variant from the loading script.
Device	Choose which device this variant targets. Options include Any (default), iPhone, iPad, iWatch, and Custom value.
Memory	Choose the minimum memory required for this variant. Options include Any (default), 1GB, 2GB, 3GB, 4GB, and Custom value.
Graphics	Choose the Metal framework to use. Options include Any (default), Metal1v2, Metal2v2, Metal2v3, Metal3v1, Metal3v2, Metal4v1, and Custom value. For more information, see the Apple developer documentation about Metal.
Display color space	Choose the color gamut to use. Options include Any (default), sRGB, DisplayP3, and Custom value.

You can also add your own setting. Click the Add custom entry button and a new pair of text boxes appear:

• <key>: Enter the name of the setting.
• <value>: Enter the value for this setting.

Other configuration settings

Setting	Description
Architecture	Choose which architecture to target. This setting defaults to ARM64 for iOS and can’t be changed.
Active Input Handling	Choose how to handle input from users.
	Input Manager (old)	Use the default Input window.
	Input System Package (New)	Use the newer Input system. To try the new Input System, install the InputSystem package.
	Both	Use both systems side by side.

Shader Variant Loading

Use these settings to control how much memory shadersA program that runs on the GPU. More info
See in Glossary use at runtime.

Property	Description
Default chunk size (MB)	Sets the maximum size of compressed shader variant data chunks Unity stores in your built application for all platforms. The default is 16. For more information, refer to Shader loading.
Default chunk count	Sets the default limit on how many decompressed chunks Unity keeps in memory on all platforms. The default is 0, which means there’s no limit.
Override	Enables overriding Default chunk size and Default chunk count for this build target.
Chunk size (MB)	Overrides the value of Default chunk size (MB) on this build target.
Chunk count	Overrides the value of Default chunk count on this build target.

Script Compilation

Property	Description
Scripting Define Symbols	Sets custom compilation flags. For more details, see Platform dependent compilation.
Additional Compiler Arguments	Adds entries to this list to pass additional arguments to the Roslyn compiler. Use one new entry for each additional argument. To create a new entry, click Add (+). To remove an entry, click Remove (-). When you have added all desired arguments, click Apply to include your additional arguments in future compilations. Click Revert to reset this list to the most recent applied state.
Suppress Common Warnings	Indicates whether to display the C# warnings CS0169 and CS0649.
Allow ‘unsafe’ Code	Enables support for compiling ‘unsafe’ C# code in a pre-defined assembly (for example, Assembly-CSharp.dll). For Assembly Definition Files (.asmdef), click on one of your .asmdef files and enable the option in the Inspector window that appears.
Use Deterministic Compilation	Indicates whether to prevent compilation with the -deterministic C# flag. With this setting enabled, compiled assemblies are byte-for-byte identical each time they are compiled. For more information, see Microsoft’s deterministic compiler option.

Optimization

Setting		Function
Prebake Collision Meshes	Adds collision data to Meshes at build time.
Preloaded Assets	Sets an array of Assets for the player to load on startup. To add new Assets, increase the value of the Size property and then set a reference to the Asset to load in the new Element box that appears.
AOT Compilation Options	Additional options for ahead-of-time (AOT) compilation. This helps optimize the size of the built iOS player.
Strip Engine Code	Enable this option if you want the Unity Linker tool to remove code for Unity Engine features that your Project doesn’t use. This setting is only available with the IL2CPP scripting backend. Most apps do not use every available DLL. This option strips out DLLs that your app doesn’t use to reduce the size of the built Player. If your app is using one or more classes that would normally be stripped out under your current settings, Unity displays a debug message when you try to build the app.
Managed Stripping Level		Chooses how aggressively Unity strips unused managed (C#) code. The options are Minimal, Low, Medium, and High. When Unity builds your app, the Unity Linker process can strip unused code from the managed DLLs your Project uses. Stripping code can make the resulting executable significantly smaller, but can sometimes accidentally remove code that’s in use. For more information about these options and bytecode stripping with IL2CPP, refer to ManagedStrippingLevel.
Script Call Optimization	Choose how to disable exception handling for a speed boost at runtime. For more information, refer to iOS Optimization.
Vertex Compression	Sets vertex compression per channel. This affects all the meshes in your project. Typically, Vertex Compression is used to reduce the size of mesh data in memory, reduce file size, and improve GPU performance. For more information on how to configure vertex compression and limitations of this setting, refer to Compressing mesh data.
Optimize Mesh Data	Enable this option to strip unused vertex attributes from the mesh used in a build. This option reduces the amount of data in the mesh, which can help reduce build size, loading times, and runtime memory usage. Warning: If you have this setting enabled, don’t change material or shader settings at runtime. For more information, refer to PlayerSettings.stripUnusedMeshComponents.
Texture MipMap Stripping	Enables mipmap stripping for all platforms. It strips unused mipmaps from Textures at build time. Unity determines unused mipmaps by comparing the value of the mipmap against the quality settings for the current platform. If a mipmap value is excluded from every quality setting for the current platform, then Unity strips those mipmaps from the build at build time. If QualitySettings.masterTextureLimit is set to a mipmap value that has been stripped, Unity will set the value to the closest mipmap value that hasn’t been stripped.

Logging

Select what type of logging to allow in specific contexts.

Select your preferred stack trace method by enabling the option that corresponds to each Log Type (Error, Assert, Warning, Log, and Exception) based on the type of logging you require. For more information, refer to stack trace logging.

Property	Description
None	No logs are ever recorded.
ScriptOnly	Logs only when running scriptsA piece of code that allows you to create your own Components, trigger game events, modify Component properties over time and respond to user input in any way you like. More info See in Glossary.
Full	Logs all the time.

Legacy

Enable the Clamp BlendShapes (Deprecated) option to clamp the range of Blend Shape weights in SkinnedMeshRenderers. This option has been deprecated and should no longer be used.

PlayerSettingsiOS