# AddThree

> AddThree (iPhone/iPad app by NumberShapes LLC.)

- Source: https://appshunter.io/ios/app/addthree/id919013296 (this page in markdown: same URL + `.md`)
- Developer: [NumberShapes LLC](https://appshunter.io/developer/909512758)
- Category: Games, Education, Family
- Price: Free
- Age rating: 4+
- Requires: iOS 6.1 · 55 MB
- Languages: American English
- Released: 2014-10-09
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/addthree/id919013296/reviews.md

## What is AddThree?

Created and tested by math educators, AddThree helps students learn how to add three digit numbers.  Kids can work independently, or with a parent, learning how to make a visual connection with the idea of “crossing ten” and “regrouping". It’s a powerful tool for teachers and parents to engage children and make learning a process they can enjoy together. Amazingly direct and effective, AddThree gives kids an edge.

*Pre-Requisite to the OverTen app.


## Version history (last 1 release)

### 1.0 — 2014-10-09

This app has been updated by Apple to display the Apple Watch app icon.

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## More apps by NumberShapes LLC

- [FortyNine](https://appshunter.io/ios/app/fortynine/id909512755)
- [AddTwo](https://appshunter.io/ios/app/addtwo/id913355047)
- [OverTen](https://appshunter.io/ios/app/overten/id913457693)
- [NumberShapes Whiteboard](https://appshunter.io/ios/app/numbershapes-whiteboard/id1052209727)
- [Multiplication Fact Workout](https://appshunter.io/ios/app/multiplication-fact-workout/id1085400375)

All apps by NumberShapes LLC: https://appshunter.io/developer/909512758

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-19.*