LifeLogger for android.
NasuLogger is a Simple LifeLogger for android OS, available free of charge. Logs are recorded on the calendar of your device such as google calendar, so it is easy to utilize the logs.
This software is free of charge. You can use it personally or commercially. You are also allowed to distribute secondary, fix/alter, do reverse-engineering. If you need source code of this software, contact to the author.