Archived App (Last seen on 9 Dec 2025)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
Inspired by the exercise Add-1/3 from Nobel prize winner Daniel Kahneman. This game lets you add 1 unit to each of the digits in a 4 digit string so that 5294 becomes 6305. See how many you can punch in correctly before you fail.
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What's New in Add Unit
1.0
December 5, 2020
