Sum 12 vs mkZero
Price, ratings, monetisation and update history for both games, side by side โ with what reviewers say about each.
Sum 12
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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. Itโs 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 youโll need a mix of strategy and a bit of luck!
mkZero
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mkZero is a fast mental math game with arcade-style number challenges. A high-speed puzzle of addition and subtraction where you clear hexes, build combos, and test your strategic thinking under pressure! โ CORE GAMEPLAY Launch numbers with + or - buttons to zero out target hexes. Choose from 5 numbers of the number wheel to access your perfect shot. When you hit zero, the hex explodes with satisfying effects! Clear all hexes to advance through increasingly challenging rounds. Itโs a game of basic mathโbut zeroing long sets of numbers requires careful planning! Two Engaging Game Modes: TIME ATTACK: Race against the clock! Destroy hexes fast to build epic combos and earn precious bonus time. Can you reach the legendary "top round"? TURN-BASED: Strategic perfection mode. Limited moves, maximum brain power. Earn bonus turns by hitting zero without cycling numbers. mkZero can be played completely offline โ no Wi-Fi (no internet access) required! โ FUN FEATURES โ Lightning-Fast Gameplay - Every second counts in this high-speed math arena โ Combo System - Chain destruction for massive time bonuses โ Dynamic Number Wheel - Strategic cycling adds layers of depth โ Progressive Difficulty - From simple calculations to mind-bending challenges โ Dual Game Modes - Speed vs Strategy, your choice โ Instant Satisfaction - Watch hexes shatter with every perfect shot โ WHY PLAYERS LOVE MKZERO "Finally, a math game that feels like action!" "Addictive doesn't even begin to describe this game." "You can play this anywhere without internet!" Perfect for math enthusiasts, puzzle lovers, and anyone seeking that perfect blend of education and pure gaming excitement. Whether you're sharpening arithmetic skills or just craving intense mental challenges, mkZero delivers non-stop thrills. โ MASTER THE REVOLUTION + Calculate lightning-fast and become a math prodigy! + Build devastating combo chains + Conquer increasingly complex number formations + Push your limits in timed challenges + Perfect your strategy in turn-based mode + Compete for the ultimate Top Round! + Great addition and subtraction practice for kids! Ready to join the math gaming revolution? Download mkZero now and discover why numbers have never been this explosive!
Screenshots
Verdict
The clearest difference is update cadence: mkZero at every 5 weeks against Sum 12's every 3 months. mkZero also leads on iOS requirement (12.2 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Sum 12 sells 1 one-off in-app purchase and mkZero sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Sum 12 ships an update every 3 months, mkZero every 5 weeks. The most recent releases landed on September 8, 2026 and September 20, 2026 respectively.
| Parameter | Sum 12 | mkZero |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 5 weeks โ better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 18.0 | 12.2 โ better |
| Further details โ not scored | ||
| Size | 46 MB | 13 MB |
| Age rating | 4+ | 9+ |
| Developer | Vitalij Schaefer | GameJab Oร |
In-app purchases
Sum 12
- Remove ads$5.99
mkZero
- Remove Ads For 3 Days$0.29
- 20 Lives$0.99
- 50 Lives$1.99
Show 6 moreShow fewer
- 100 Lives$3.99
- Remove Ads$4.99
- 300 Lives$9.99
- 500 Lives$14.99
- 1,000 lives!$24.99
- Infinite Lives$99.99









