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 iPhone. There are modest collection adjustment and export options, plus handy gesture support. Here's our look at Tally for iPhone.
There aren't a huge number of people who need an incremental counter app, but I can think of at least one example. Years ago, I was a special education teacher at a residential school. We took lots of data with our students, like the number of times a behavior is performed within a given time period. Back then, we m