With this application you can easily find a description of your microcontroller and read its characteristics. Now all datasheets and application instructions will always be in your smartphone.
All documentation for AVR and ARM microcontrollers from Atmel®.
Good pocket book for embedded system developers and people, which are interested in electronics.
Really wanted to see what it was about. Play store said one download. I'm #2, the disappointed one. Instantly crashes, would report to Dev. Won't do it tho, I imagine he knew it was crap or ain't trying to make it work with a respectable minimun build. Don't wanna hear any excuses, it don't wanna work.
Comprehensive enough for a daily AVR user.