The app logs CPU usage, available memory, data usage (transmitted and received Kb) and battery level:
When you start the app it asks for a Cosm Feed ID and a key (with update and create permissions). Users can also configure what resources will be logges and how often the feed will be updated (1 minute, 5 minutes, 15 minutes, 30 minutes, 1 hour, 2 hours).
The CPU usage and available memory are polled every 10 seconds and a total average is calculated and used for updating the feed.
Thinking of adding more features like call duration and number logs, etc. especially if users like it and find it useful. A background service is used to monitor and log the resources, users can start/stop the service through the application main interface.
You can download the apk and Android source files from: http://code.google.com/p/cosm-android-logger
You can also get the application throug Android Play:
EDIT (29/6/12): Entering the Cosm key manually really sucks, so I have updated the app to use a QR code reader for that purpose. Simply go to http://goqr.me/ or any alternative and generate a QR code with your key. Then simply use the ‘Read QR code’ button