Column Subtraction

It’s January 2026. I gave the app 1 star because it is full of bugs and is unpredictable. 1.) All settings are reset to default after exiting and re-entering. 2.) The subtraction sign is ON TOP OF the number in the second row most of the time but not always. The minus sign should be to the LEFT of the number. 3.) The digit settings don’t do what is expected half the time. When setting the game to 3-digit subtraction, the game might display 2-digit or 1-digit or other. I wasted $4 on this app. If an app isn’t maintained for 4 years like this one and has a 5-star review, then closer inspection is warranted. The app has good features and is a great concept. However, the features just don’t work as intended. The only written review was from 15 years ago, and it was a 5-star praise of the app. Buyer beware. Update Jan./2026: I am running iOS 26.2 on an iPhone 14 Pro Max, so my software is up-to-date.

This is an excellent way for my special education students to practice the skills they have learned in solving subtraction problems with regrouping. This is such a hard concept for them to work out on paper many times and this app makes it fun and at the same time shows them what they need to do. Then, when THEY actually go to work problems out on paper by themselves they refer to what they app showed them how to do. For some reason it is so much "cooler" to do the way the app shows them verses the way the "teacher" shows them....LOL - my students love this app. GET ALL of Esa's apps - they will have your students asking to solve problems all the time.