You don't need external logging frameworks for #iOS and #mac
apps.
The built-in OSLog system is super easy to use and provides exceptional performance.
Apple provides extensive documentation: https://developer.apple.com/documentation/os/logging/generating_log_messages_from_your_code
There is also a #WWDC2020 video: https://developer.apple.com/videos/play/wwdc2020/10168/
And when I talked about this at Cocoaheads Berlin, I created a sample project that also shows how to export logs from user devices:
https://github.com/greimers/Landmarks-with-Logging