A friend just asked about services that could capture all relevant events in an iOS app, whether crashes, user activity, or ad hoc metrics. I told him about how I use Crashlytics but mentioned there are a lot of very similar services.
I decided to do some searching, and this is what I found in just a few minutes:
Yahoo (was Flurry): analytics
PubNub: analytics, push
Microsoft HockeyApp (was/is HockeyApp, was Application Insights): test distribution, crash reports, (test) analytics
Localytics: analytics, push
Google: analytics, crash reports, push
Apple (was/is TestFlight): crash reports, analytics, test distribution, push (obviously)
Apteligent (was Crittercism): crash reports, analytics
Splunk Mint (was Bugsense): crash reports, analytics
Amazon Mobile Analytics: analytics, push
Oracle (was Push.io): push
Urban Airship: push, analytics
As you can see, all the major players want to be in this, and there has been a consolidation of the industry as they bought up the existing, smaller companies. Basically, if they know what users are doing, they can sell better ads and send better targeted marketing push messages. Logical, but a bit depressing!