# Sum 12 — Train your brain, sum fast!

> Train your brain, sum fast! (iPhone/iPad app by Vitalij Schaefer.)

- Source: https://appshunter.io/ios/app/sum-12/id6738145230 (this page in markdown: same URL + `.md`)
- Developer: [Vitalij Schaefer](https://appshunter.io/developer/393749449)
- Category: Games, Education, Puzzle, Trivia
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 46 MB
- Languages: American English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 23 more
- Released: 2025-02-04
- Data updated: 2026-09-08
- User reviews in markdown: https://appshunter.io/ios/app/sum-12/id6738145230/reviews.md

## What is Sum 12?

Train your brain while having fun with numbers!

This engaging domino game helps improve mental math skills as you strategically match pairs that add up to 12.

It’s a great way for kids to practice quick addition in a playful and interactive way. Perfect for players of all ages who enjoy logic and number challenges!

The goal of the game is to clear all the dominoes from the playing area.

To do this, find two face-up dominoes whose values add up to 12 and select them one after the other.

If their sum equals 12, they will be removed, allowing you to flip over any previously blocked dominoes.

Keep in mind that a game is not always solvable, so you’ll need a mix of strategy and a bit of luck!

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove ads | $5.99 | one-time |



## Version history (last 5 releases)

### 1.6 — 2026-09-05

Bug fixes and improvements

### 1.5 — 2026-06-01

Bug fixes and improvements

### 1.4 — 2025-09-08

Bug fixes and improvements

### 1.3 — 2025-04-29

Bug fixes and improvements

### 1.2 — 2025-02-15

Bug fixes and improvements

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| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [SOMOS CLAN](https://appshunter.io/ios/app/somos-clan/id6748158728) | — | Free | Games |
| [Sumalo: Fast Mental Math](https://appshunter.io/ios/app/sumalo-fast-mental-math/id6762127607) | 5.0 (1) | Free | Games |
| [Equazzler - Addition Puzzle](https://appshunter.io/ios/app/equazzler-addition-puzzle/id6466097939) | 5.0 (1) | Free | Games |
| [SUM UP！3Match Number Puzzle](https://appshunter.io/ios/app/sum-up3match-number-puzzle/id6502975661) | — | Free | Games |
| [ココロGarden｜気ままに植物を育て癒される言葉をもらう](https://appshunter.io/ios/app/garden/id1437116541) | — | Free | Games |

## More apps by Vitalij Schaefer

- [Image Size](https://appshunter.io/ios/app/image-size/id670766542)
- [Biometric Passport Photo](https://appshunter.io/ios/app/biometric-passport-photo/id759142884)
- [Blue Switch](https://appshunter.io/ios/app/blue-switch/id828280876)
- [Passport Photo - ID Photo](https://appshunter.io/ios/app/passport-photo-id-photo/id917389447)
- [Batch Resize](https://appshunter.io/ios/app/batch-resize/id917394599)
- [Photo Collage Maker & Printer](https://appshunter.io/ios/app/photo-collage-maker-and-printer/id917397212)

All apps by Vitalij Schaefer: https://appshunter.io/developer/393749449

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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 2026-09-08.*