Calc Ninja vs SumDash
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Calc Ninja
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Calc Ninja is a mental-math battle puzzle. Fill the blanks in each equation to strike down the oni! How to play 1. Each battle shows an equation with blank tiles, e.g. ( □ + □ ) × □ = 18. 2. Tap number tiles to fill the blanks so the equation is true. 3. A correct answer strikes the demon; a wrong answer or running out of time lets it strike you. Content - 30 scrolls across 6 ninja ranks (Shoden to Gokui) - 16 unique oni bosses with a demon gallery - Operators and parentheses stay fixed. You only place the numbers, so it is pure mental math. Great for - Adults who want daily brain training - Anyone who likes number puzzles and quick arithmetic - Fans of a Japanese ninja-and-oni theme Free to play. No account required. * This app is a work of fiction. Characters and story are not based on real people or events.
SumDash
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How fast is your mental math when the clock is ticking? SumDash turns arithmetic into a fast-paced arcade game: solve +, -, x and / before the countdown hits zero. Every correct answer refills the timer and pushes the pace a little higher. It starts easy. It never stays easy. No worksheets, no lectures - just you, four operations and a clock that keeps getting braver. If you have ever wanted quick math practice that actually gets your pulse up, this is it. GAME MODES • Endless - the classic run. Keep solving, keep speeding up and chase a new personal best. • Daily Heat - one shared challenge for the whole world. Everyone faces the same puzzle sequence that day, so the leaderboard is a pure test of skill. • Ranking - compete for the weekly global leaderboard. You get 3 hearts: a wrong answer or a timeout costs one, and the run ends when they are gone. • Practice - no timer, no hearts, no pressure. Solve as long as you like and check your accuracy at the end. CLIMB THE WEEKLY RANKING The global leaderboard resets every week, and the Top 5 sits right on the home screen. Pick a nickname, post a score and see how you stack up against players worldwide - then come back tomorrow and defend your spot. HOW TO PLAY 1. Tap the correct answer before the countdown runs out. 2. Every correct answer adds time - and the game speeds up. 3. You have 3 hearts. A wrong answer or a timeout costs one. That is the whole rulebook. Mastering it is another story. WHO IT IS FOR • Anyone who wants an arithmetic trainer that feels like a game, not homework • Students sharpening addition, subtraction, multiplication and division - a fun alternative to times tables drills • Adults who want a short brain warm-up with their coffee or on the commute • Anyone chasing sharper focus, faster calculation and quicker reflexes SHORT, LIGHT, FRIENDLY A round takes just a few minutes, so SumDash fits into any break. Your recent runs are saved, so you can watch yourself get faster. It is free, works offline and needs no account - the global board simply connects when you are online. +, -, x, / - how fast can you really go? Get SumDash and find out today.
Screenshots
Verdict
The clearest difference is in-app purchases: Calc Ninja at none against SumDash's 1. SumDash's advantage is update cadence (every 2 days vs monthly) and device support (3 vs 1). On price and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. SumDash sells 1 one-off in-app purchase. Calc Ninja asks for nothing beyond the download.
Calc Ninja ships an update monthly, SumDash every 2 days. The most recent releases landed on October 31, 2026 and November 2, 2026 respectively.
| Parameter | Calc Ninja | SumDash |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Every 2 days — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 118 MB | 52 MB |
| Age rating | 9+ | 4+ |
| Developer | kotaro yamada | YT Lab |
In-app purchases
Calc Ninja
No in-app purchases
SumDash
- Remove Ads$0.49









