What are some alternatives?
HockeyApp - Manage your betas and collect live crash reports for iOS, Android, Windows Phone, and OS X apps.
Install On Air - Install On Air offers Testflight and Diawi Alternative for iOS and Android App. Distribute your application in less time with best platform for app distribution.
TestFlight - iOS beta testing on the fly.
Shuttle.tools - Distribute and manage your mobile apps, all from one place. For Both iOS & Android.
Sentry - Open-source error tracking that helps developers monitor and fix crashes in real time. Iterate continuously. Boost workflow efficiency. Improve user experience.
Firebase Crashlytics - The most powerful, yet lightest weight crash reporting solution for iOS and Android developers. | Crashlytics