When comparing Crittercism vs Crashlytics, the Slant community recommends Crashlytics for most people. In the question“What are the best mobile bug and error reporting tools for iOS/Cross-Platform?” Crashlytics is ranked 2nd while Crittercism is ranked 3rd.
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Pros
Pro The UI is extremely user-friendly
Crittercism's dashboard shows all the information needed for finding and fixing bugs. It displays all running threads at the time the crash occurred, memory usage, battery level, disk space, sdcard space and other important information about the device.
Pro Supports All Mobile Platforms:
iOS, Android, Android NDK, Windows Phone, Unity, Xamarin, Appcelerator, HTML5
Pro Used by many big companies
Crittercism is used by Netflix, eBay, Nike, etc.
Pro Free plan available
The Free plan includes up to 30000 Monthly users, data retention for upto 30 days and Email support. So if you have a small to medium sized app, you can go for Crittercism.
Cons
Con No public HTTP API
No public HTTP API (e.g. REST, GraphQL) in lieu of poor cross-platform support.
Con iOS and Android only
Only provides SDKs for iOS and Android.