Kanji Trainer vs Numina
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kanji Trainer
Master Japanese kanji with mnemonic phrases derived from etymological backgrounds. This app offers targeted repetition, detailed statistics, and training modes for reading, writing, and radicals. Learn 2136 Joyo-Kanji and 500 radicals effectively.
- Mnemonic phrases based on etymology
- Reading and writing practice
- Targeted repetition of unlearned characters
- Detailed learning statistics
- 2136 Joyo-Kanji included
- Radical training modes
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The strength of the Kanji Trainer are the mnemonic phrases for memorizing the character that are principally based on the etymological background. The components (radicals) are always used with the same consistent meaning. The phrases are constituted in the order that first the components are mentioned and at the end the meaning of that kanji. The main functions are: - Training of reading and writing the kanji characters - Mnemonic phrases for each character - Targeted repetition of unlearned characters - Detailed statistic diagrams of your learning success - 2136 Joyo-Kanji - 500 radicals as recurring elements that can be selected for learning the differences and simularities - Training modes for radical training Terms and conditions: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Numina
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Most people pull out their phone the second numbers appear. Numina trains you not to need it. Numina is a mental math training system designed to make calculation fast, automatic, and genuinely useful in real life. You learn the same kinds of techniques used by mental calculators — then train them until they feel effortless. Not school math. Speed math. Real mental performance. WHAT YOU’LL BE ABLE TO DO • Multiply large numbers in your head • Solve calculations faster than people using calculators • Instantly square numbers • Estimate quickly in everyday situations • Think through numbers without freezing or guessing • Build real calculation reflexes through repetition and drills And because the training is built like a skill game, you actually want to keep improving. HOW NUMINA WORKS Learn the technique → Train it immediately → Build automatic speed Every lesson connects directly to drills and gamemodes designed around one specific skill. You don’t just watch explanations — you use the technique right away until it becomes natural. Most lessons take under 5 minutes. You feel yourself getting faster almost immediately. — — — WHAT’S INSIDE • 350+ lessons and training modes • Mental math techniques schools never teach • Speed drills built around automaticity and reflexes • Calculator Challenge — race against a real calculator • Numina Rating (NR) — track your actual skill level • Progress tracking with speed and accuracy history • Structured collections for Business, Engineering, Finance, Science, Trades, and more — — — FREE VS PRO The free version gives you real techniques that already feel impressive. PRO unlocks the full training system: advanced methods, deeper drills, structured progression, performance tracking, and the complete path toward elite-level calculation ability. — — — This isn’t about being “good at math.” It’s about becoming fast. Start your first session in under a minute. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://numinamath.co/privacy
Screenshots
Verdict
The clearest difference is iOS requirement: Kanji Trainer at 13.0 against Numina's 15.1. On price, update cadence, ads and in-app purchases 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. Kanji Trainer sells 1 in-app purchase, starting at $9.99 per year and Numina sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.
Kanji Trainer ships an update every 3 months, Numina every 2 months. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.
| Parameter | Kanji Trainer | Numina |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 20 MB | 120 MB |
| Age rating | 4+ | 4+ |
| Developer | Ulrich Neymeyr | SVERRE ANKER LARSEN GROENAAS |
In-app purchases
Kanji Trainer
- Premium$9.991 Year
Numina
- Numina PRO$8.991 Month
- Numina PRO7 Days trial$79.991 Year









