Chip Ref allows you to check the pinouts and characteristics of many common ICs,
including:
ATmega series chips as used in arduino (ATMega128, AtMega328)
ATTiny series chips as used in trinket ( ATTiny85 chip)
Includes external links to PDF datasheets
Internet access only required for datasheets, pinouts etc are inside the app.
Twitter: @mikered
Updated for android 8