Really simple tally counter, only tap the screen to count so you don't have to look at the device while counting. Press back button, or small button in the lower left to count backwards.
Perfect for counting laps, objects, etc.
This tally counter is free (as in freedom) software .The source code is available in github.
Tags: do tally counters go backwards and forwards , tally app source code , tally counter widget , codigo fuente de un contador en eclipse , tally counter that counts forward or backwards