Great debug tool.
amazing insights into what crashes are happening and it's FREE! event works with ndk, seemlessly
Both as an app developer and an SDK developer I've come to depend on crashlytics excellent reporting. This is by far the clearest, most searchable and most actionable error logging in the industry AND IT'S FREE. I use it for iOS and Android.
Offered by Twitter for free to collect data for ad-targeting and bundle in advertising services into the Fabric platform.