2.1.1

• Added support for extensions.
• Added support for Bitcode.
• Improved error messages.

2.0.0

• The ApiKey format has been changed. The app ID in a new format is available in the AppMetrica web interface when the app editing mode is engaged.
• The method of initializing the library in the app has been renamed from [YMMYandexMetrica startWithAPIKey:(NSString *)apiKey]; to [YMMYandexMetrica activateWithApiKey:(NSString *)apiKey];.
• The session length has been changed. Now it is 10 seconds, by default.
• The library has been adapted for iOS 9.
• Improved quality of calculating statistics for app installations and devices identification for tracking.
• We have significantly improved performance and reduced the power consumption.
• The obsolete methods have been removed.

For more details see official doc page

1.8.5

• Supported iOS 9

1.8.2

• Added ability to set crash environment

1.6.2

• Fixed crash reporting bugs

1.6.1

• Improved campaigns tracking accuracy

1.6.0

• Improved stability and performance
• Switched to reading [idfa] from AdSupport within library
• Added events with additional parameters
• Added free app install tracking support
• Renamed YMMCounter to YMMYandexMetrica
• Changed ApiKey type from integer to string
• Supported Xcode 6 and iOS 8
• Switched to min supported target iOS 6
• Improved location handling
• Switched to asynchronous error processing using blocks
• Optimised library start

1.2.3

• Removed all references to idfa (AdSupport.framework) from library
• Improved library stability

1.2.0

• Reduced size of library by half added to target app
• Optimised performance up to 30%
• Added arm64 and x86_64 slice to the library's binary
• Added arm64 crash handling
• Moved to protobuf-c
• Extracted FMDB as an external dependency
• Adjusted session length logic
• Added API for managing library logging
• Added jailbreak detection
• Improved library stability

1.0.1

• Removed private methods
• Extracted ProtobufObjC as an external dependency