Before starting with iOS development in Unity, familiarize yourself with system requirements and compatibility information.
Unity supports iOS 12 and above. For more information, refer to PlayerSettings.iOS-targetOSVersionString.
iOS devices support Metal. For more information, refer to Metal Graphics API.
Unity supports importing a variety of source format sound files. However, when importing the sound files (except tracker files), they’re always re-encoded to the build target format. By default, these files are in Vorbis format, but you can override them to other formats (such as ADPCM, MP3) for each platform, if required. Vorbis playback provides better compressionA method of storing data that reduces the amount of storage space it requires. See Texture Compression, Animation Compression, Audio Compression, Build Compression.
See in Glossary and quality for iOS compared to MP3 playback.
Unity iOS doesn’t support DXT textures. Instead, iPhone/iPad devices natively supports ASTC, PVRTC, ETC2, and ETC texture compression3D Graphics hardware requires Textures to be compressed in specialized formats which are optimized for fast Texture sampling. More info
See in Glossary formats. For more information about iOS texture formatsA file format for handling textures during real-time rendering by 3D graphics hardware, such as a graphics card or mobile device. More info
See in Glossary, refer to texture import settings and texture compression format.