# Mental Math Games: Numbio — Arithmetic Trainer & Cards

> Interactive mental math trainer for speed, accuracy, and cognitive enhancement. (iPhone/iPad app by Peter Schmidt.)

- Source: https://appshunter.io/ios/app/mental-math-games-numbio/id1551025256 (this page in markdown: same URL + `.md`)
- Developer: [Peter Schmidt](https://appshunter.io/developer/1551025258)
- Category: Education, Games
- Price: Free with in-app purchases
- Rating: 4.70/5 from 1,131 App Store ratings · 502 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 58 MB
- Languages: Russian, Bulgarian, Hindi, Vietnamese, American English, Hungarian, Dutch, Greek, Danish, Indonesian and 18 more
- Released: 2021-02-09
- Data updated: 2026-08-27
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/mental-math-games-numbio/id1551025256/reviews.md

## What is Mental Math Games?

Numbio (formerly FastMath) turns mental math into a fast, satisfying daily habit. Train arithmetic, master your times tables, and watch your calculation speed climb in just a few minutes a day.

WHY NUMBIO?
• Practice that adapts to you: difficulty scales from Easy to Extreme as you improve.
• Bite-sized sessions for any schedule: a 60-second speed test or a full training plan.
• Actually fun: turn drills into a game and keep your daily streak alive.

PRACTICE EVERYTHING
• Free core arithmetic: addition, subtraction, multiplication & division
• Times tables, digit sums, mixed expressions & chained operations*
• Word problems, equations, rule of three, fractions, GCD & LCM*
• Advanced operations: percentages, squares, square roots & modulo*
• Every number type: decimals, money, fractions, binary, Roman numerals & more*
• Build your own custom training plans: practice exactly what you want*

LEARN THE TRICKS
• Step-by-step mental-math tricks and shortcuts that make hard sums easy
• Practice any trick right away with a matching, ready-made drill*
• A personalized "For You" feed that suggests what to learn next*

PLAY & COMPETE
• Brain-teasing games: Number Hunt, Magic Square, Sudoku & Mini Sudoku
• Climb Game Center leaderboards and unlock dozens of achievements

TRACK YOUR PROGRESS
• Build daily streaks and hit personal goals that keep you coming back
• Earn XP and level up through ten ranks, from Bronze to Diamond
• Watch your speed and accuracy climb with detailed stats and personal bests
• Set daily reminders so you never break your streak

ON ALL YOUR DEVICES
• Cross-device sync keeps your progress in step wherever you practice
• Jump in within seconds from Home Screen and Lock Screen widgets
• Family Sharing: share Numbio Pro with up to five family members
• Available in 29 languages

PERFECT FOR
Students building arithmetic confidence • Test-takers prepping for GMAT, GRE & entrance exams • Professionals staying sharp • Parents and kids learning times tables • Anyone who loves a good number puzzle

Join thousands of learners worldwide sharpening their mental math with Numbio.

Questions or feedback? We'd love to hear from you at hello@numbio.com.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Privacy Policy: https://www.numbio.com/privacy

* Requires a Numbio Pro subscription.

## Key features

- Wide variety of math exercises
- Timed challenges for speed
- Progress tracking and high scores
- Adjustable difficulty levels
- Math tricks and shortcuts
- Customizable trainer mode
- Achievements and rewards

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro Annual | $17.99 | per year |
| Pro Monthly | $4.99 | per month |
| Pro access (secret discount) | $9.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Small tip | $0.99 | one-time |
| Medium tip | $3.99 | one-time |
| Large tip | $8.99 | one-time |
| Pro Lifetime | $49.99 | one-time |


## What do users think of Mental Math Games?

Overall sentiment: positive

**Pros**

- 🚀 Helpful for learning math
- 👍 Fun and engaging
- 👍 Clean and intuitive interface
- 🚀 Effective for improving mental math skills
- 👍 Great for all ages
- 👍 Motivating with progress tracking

**Cons**

- 💰 Limited features in free version
- 🔒 Subscription required for full access
- 🐛 Occasional performance issues

**Commonly reported bugs**

- Inconsistent scoring feedback
- Subscription issues with repeated charges

**Most requested features**

- More advanced math operations (e.g., powers, roots)
- Customizable practice sessions
- Detailed performance analytics
- Ability to review past questions

## Recent user reviews (10 of 502)

All indexed reviews: https://appshunter.io/ios/app/mental-math-games-numbio/id1551025256/reviews.md

### 5/5 — Merci

*2026-08-21*

Le jeu est très sympa avec une variété d’options gratuites et encore plus avec la version payante rentable selon moi. Les nouveaux graphismes ajoutent encore plus d’allure au jeu avec un design moderne et épuré. L’assistance est très rapide et à l’écoute et c’est pourquoi je les remercie et je recommande vivement cette application pour les personnes voulant s’améliorer en mathématiques de manière qualitative

**Developer response:** Merci pour ce retour ! Deux réglages peuvent aider : Profil → Réglages → Disposition des exercices → Calculs pose les questions en colonnes, ce qui garde les chiffres plus grands, et Réglages de l'iPhone → Accessibilité → Réglages par app → Numbio → Texte plus grand agrandit la police dans Numbio uniquement. Un retour à l'ancienne présentation n'est pas prévu, mais c'est noté. Une question ? hello@numbio.com. Bon calcul !

### 5/5 — Muito bom

*2026-08-20*

Muito bom

**Developer response:** Muito obrigado pela avaliação de 5 estrelas! Ficamos felizes que você esteja gostando do Numbio. Se tiver alguma ideia ou dúvida, é só escrever para hello@numbio.com. Bons cálculos!

### 5/5 — Excelente

*2026-08-17*

To usando pra treinar calculo mental e tá funcionando!

**Developer response:** Muito obrigado pela avaliação! Fico feliz que o treino esteja dando resultado. Se tiver alguma sugestão ou encontrar algum problema, é só escrever para hello@numbio.com. Bons cálculos!

### 4/5 — Orientation of Questions

*2026-08-05*

Can you please bring an option in the settings in order to change the orientation of the questions from portrait to landscape like the ones that were there in FastMath.

**Developer response:** Good news: that option exists since the latest update (4.3.0). Go to Profile → Settings → Exercise Layout and pick the horizontal question layout, like FastMath had; it's even the default again. Make sure you're on 4.3.0 by updating directly from the App Store page. And if you meant something else, write us at hello@numbio.com. Happy calculating!

### 5/5 — Muito bom

*2026-08-03*

Ajuda a gravar as contas, aumentar a velocidade de resolução e etc… recomendo bastante

**Developer response:** Muito obrigado pela recomendação! Que bom que a Numbio está te ajudando a ganhar velocidade. Se tiver dúvidas ou ideias, escreva para hello@numbio.com. Bons cálculos!

### 5/5 — Taille de police

*2026-08-03*

J’avais mis 4 étoiles mais avec la dernière maj j’en met 5 merci d’écouter les utilisateurs l’appli est incroyablement cool et pédagogique et même compétitif ! 

Merci continuer comme ça

**Developer response:** Salut ! Merci beaucoup pour ton retour et tes 4 étoiles. Bonne nouvelle : avec la mise à jour 4.3.0, les opérations s'affichent à nouveau sur une seule ligne, et dans les réglages tu peux maintenant choisir le style des symboles mathématiques pour ne plus confondre × et −. Mets l'app à jour directement depuis l'App Store et dis-nous ce que tu en penses à hello@numbio.com. Bon calcul !

### 4/5 — Moins fluide depuis la MaJ

*2026-08-01*

Je suis utilisateur très régulier de l’appli, je fais un peu de tout mais surtout de la vitesse en multiplication simples 

Le retravail visuel de l’appli est vraiment réussi et très agréable, c’est pourquoi je mets 4 étoiles 
Ceci dit j’en aurais mis 5 à la version précédente simplement pour la fluidité de validation des réponses et d’affichage de l’opération suivante, pour les catégories « faciles » ou l’enjeu est la rapidité cela est très handicapant, j’ai perdu environ 10 de score en raison de ça, si c’était possible de retrouver la même fluidité que précédemment ce serait 5 étoiles sans hésiter !

**Developer response:** Salut ! Merci beaucoup pour ce retour détaillé et tes 4 étoiles. La fluidité nous tient autant à cœur qu'à toi : un bug qui ralentissait l'enchaînement des opérations a été corrigé en 4.2.0, et la 4.3.0 vient tout juste de sortir. Vérifie que tu es bien sur la toute dernière version (mise à jour directe depuis la page App Store). Si l'enchaînement te semble toujours moins fluide qu'avant, écris-nous à hello@numbio.com avec ton modèle d'iPhone, on regardera ça de près. Bon calcul !

### 4/5 — Taille de police

*2026-07-30*

En gros l’appli est incroyable mais la taille de la police sur les exercices et trop petite on confond les x - etc… si vous pouvez juste agrandir la police sur les exercices 1 min calcul mental l’application deviendrais encore mieux

**Developer response:** Salut ! Merci beaucoup pour ton retour et tes 4 étoiles. Bonne nouvelle : avec la mise à jour 4.3.0, les opérations s'affichent à nouveau sur une seule ligne, et dans les réglages tu peux maintenant choisir le style des symboles mathématiques pour ne plus confondre × et −. Mets l'app à jour directement depuis l'App Store et dis-nous ce que tu en penses à hello@numbio.com. Bon calcul !

### 3/5 — Fastmath -> Numbio: Update Review

*2026-07-29*

Annoying update that has degraded experience as identified below but also some positives.

1. The primary tests have changed to a much more cluttered ui, smaller font + keyboard… no real benefit… harder to read and input with less relevant info taking up more space.

2. Where did the total problems solved count go?? Vanished from stats

3. Surely the ai features should be more thoughtful vs just suggesting tricks. For example, the app should log the problems you have solved and identify frequent errors or problems that take longer to solve. There should be some central database on the backend that can suggest to stop spending time on medium addition and to swap to multiplication bc you’ll get better in aggregate, etc.

4. Stats log is still woefully bad. It should have time to solve problem, initial input, the type of problem and the problem itself - this would enable a more robust ai analsysis

Positives: Some nice additions with new problem types like word problems, sequences, etc. but would like these to be proper tests as well so that there are leaderboards etc. .. squares should have proper training too with ability to select own drills

**Developer response:** Thanks for taking the time to write such a detailed review, this is exactly the kind of feedback that shapes the app. Point by point: the latest update (4.3.0) brings the exercises back to a single line by default, and in the settings you can pick the layout, the math symbol style, and larger keypad buttons. On the total-problems-solved count: you're right, it didn't make it into the new stats, and we've noted bringing it back. On AI: AI Picks already analyzes your results to recommend what to practice, and deeper error and solve-time analysis like you describe is something we'll definitely consider, as are richer per-problem stats and leaderboards for the new problem types. Update via the App Store page and let us know how it feels at hello@numbio.com.

### 5/5 — Please help me out

*2026-07-26*

Really love this app, one of my favorite things to play with when I’m relaxing. After the update though I find annoying that the numbers are now way too small and they’re vertically stacked (on addition that is, the section I mainly played on [1# global]) making it difficult for me to keep the usual speed of my calculations. Is there a way to change this setting? If not now in the will there be a way to change it in the future?

**Developer response:** Thanks so much for the great review! We’re happy to hear you’re enjoying Numbio as a fun way to pass the time. Keep having fun, and if you ever have any suggestions, feel free to reach out at hello@numbio.com. Happy calculating!

## Frequently asked questions about Mental Math Games

### What does the FastMath app do?

FastMath is a personal brain trainer designed to help users master mental math quickly. It offers a variety of interactive exercises to improve calculation speed and accuracy, making it suitable for test preparation, brain fitness, and everyday mental math training.

### What kind of math exercises are available?

The app supports a wide range of exercises including addition, subtraction, multiplication, and division. It also offers advanced options like squares, square roots, fractions, percentages, and modulo operations, catering to various skill levels.

### Is FastMath free to use?

The app is free to download and use with basic features. However, certain advanced features like squares, square roots, fractions, percentages, and modulo operations require an active FastMath Pro subscription.

### Who can benefit from using FastMath?

FastMath is ideal for a broad audience, including elementary and high school students, university students, graduates preparing for exams like the GMAT and GRE, professionals training for assessments, and adults seeking to enhance their mental sharpness and cognitive skills.

### How does FastMath help improve math skills?

It helps improve math skills through timed challenges that boost speed and accuracy, personalized goal setting, progress monitoring, and the learning of handy math tricks and shortcuts. The trainer mode also allows for customized exercises to focus on specific areas.

## Version history (last 5 releases)

### 4.5.0 — 2026-08-23

We regularly update Numbio to keep your mental math training smooth, fast, and fun. Every update brings a mix of improvements, refinements, and bug fixes to help you practice better.

Thanks for training with us, and happy calculating! Questions or feedback? Reach us at hello@numbio.com.

### 4.4.0 — 2026-08-16

We regularly update Numbio to keep your mental maths training smooth, fast, and fun. Every update brings a mix of improvements, refinements, and bug fixes to help you practise better.

Thanks for training with us, and happy calculating! Questions or feedback? Reach us at hello@numbio.com.

### 4.3.0 — 2026-08-01

We regularly update Numbio to keep your mental math training smooth, fast, and fun. Every update brings a mix of improvements, refinements, and bug fixes to help you practice better.

Thanks for training with us, and happy calculating! Questions or feedback? Reach us at hello@numbio.com.

### 4.2.0 — 2026-07-29

We regularly update Numbio to keep your mental maths training smooth, fast, and fun. Every update brings a mix of improvements, refinements, and bug fixes to help you practise better.

Thanks for training with us, and happy calculating! Questions or feedback? Reach us at hello@numbio.com.

### 4.1.1 — 2026-07-20

A major update is here!

Numbio just got a fresh new look, including a brand-new app icon, plus refinements across the app to make practising mental maths even better.

In this update:
• A completely refreshed design and new app icon
• More ways to practise, play, and track your progress
• Smoother, faster performance across the app
• Bug fixes and polish throughout

Thanks for training with us. Happy calculating!

Questions or feedback? Reach us at hello@numbio.com.

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## More apps by Peter Schmidt

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All apps by Peter Schmidt: https://appshunter.io/developer/1551025258

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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 2026-08-27.*