Agile Tortoise's Tally for iPhone (US$0.99) is a no-look, incremental counter app that's simple and useful. The whole screen becomes a button, so you can pay attention to your data source, not the ...

For a $1.99 in-app purchase you can get unlimited tally counters and a nice dark theme. It's a simple little thing, but it really is useful for those rare moments when you need to keep track and ...