Apps by Vitalij Schaefer
Sum 12 app icon

Games

Sum 12

Vitalij Schaefer

Free download In-app purchases
Open on Apple

About this app

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!

Latest release

What’s New

Version 1.5 Jun 1, 2026

Bug fixes and improvements

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
0 ratings
0 Aug 10, 2026 · 0 ratings Aug 10, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current Free
Historical low Free
Paid → free
Price history
Current Free
Free Aug 10, 2026 · Free Aug 10, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Aug 10, 2026 · 6:12 PM Free

Screenshots

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