Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.
AirBrake - Airbrake is the leading exception reporting service, currently providing error tracking.
Firebase Crashlytics - The most powerful, yet lightest weight crash reporting solution for iOS and Android developers. | Crashlytics
TestFlight - iOS beta testing on the fly.
Visual Studio App Center - Continuous everything – build, test, deploy, engage, repeat
BugSnag - Not all bugs are worth fixing. Prioritize and fix software bugs that matter while improving software stability with every release.