Tally Counter is a free utility and tools application available on the iPhone. Developed by Pixel Research Labs Inc., this app offers a simple and attractive way to keep track of counts.

The main features of Tally Counter include an Apple Watch app, allowing users to change their count directly from their Apple Watch. Additionally, the app offers a Today extension, enabling users to change their count from their lock screen or notification center.

With Tally Counter, increasing and decreasing a count is made easy with large buttons that are easy to hit. Users also have the option to customize their counters, choosing to have only a plus button or minus button. The app also offers the functionality of resetting the count with an undo option, as well as setting custom reset and limit values.

Other notable features of Tally Counter include the ability to manually set the value of the counter by flicking the individual digits, the option to turn sound effects on and off, and the option for left-handed operation. Users can also choose to display the count on the app icon, speak the tally, and keep their device from sleeping while Tally Counter is active.

Overall, Tally Counter provides a user-friendly and customizable solution for keeping track of counts on the iPhone.