iOS: It's a rare occurrence for most of us, but sometimes you need to keep track of something and tally up a total. Tally 2 is a simple little app that does just that, and it's free for the basic version.
We've mentioned Tally before when it was a paid app, but now it's free for most uses. It's also dead-simple to use. Tap the screen to count, or swipe down to reverse. You can also change step increments, add visual/audio confirmation and easily share your tallies with others. For a $2.49 in-app purchase you can get unlimited tally counters and a nice dark theme. It's a simple thing, but it really is useful for those rare moments when you need to keep track and count something.
Tally 2 (free) [iTunes App Store]