: Indicates a "universal" build compatible with 64-bit ARM processors (common in modern iPhones and iPads).

: Offers 4–60 bands that are fully configurable.

: Likely refers to minimum OS requirements (e.g., iOS 9.0+) or internal build compatibility codes. IPA : The standard file format for iOS applications. How to Install .IPA Files (Sideloading)

: Enhances stereo perception for headphone users.

: Plays lossless formats like FLAC, OGG, and high-res audio up to 768 kHz on supported hardware. Understanding the File String