No personally identifiable information is stored on your device or sent back regarding your use of the application. Any user names or passwords necessary for application ‘share’ features (Facebook, Twitter, etc.) are not stored or used other than to share the content.
Crash reports are collected from both iOS and Android applications, and are available to developers in the app store / marketplace respectively. This is standard for all applications sold this way, and contains no personally identifiable information, just information about the error. On Android we also use the ACRA third party application for crash reporting in Android 2.1 devices, since crash reports weren’t native until Android 2.2 (FroYo)