# Calcul Mental in Space vs Fast Math

Calcul Mental in Space and Fast Math both sit at 4.4 stars, but that hides the real split: 71% of Calcul Mental in Space's written reviews are positive against 25% of Fast Math's. Calcul Mental in Space also leads on update cadence (every 6 days vs fortnightly) and ratings volume (576 vs 84). Fast Math's advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 15.0). On price, rating, ads and device support there is nothing between them.

Both are free to download. Calcul Mental in Space sells 1 one-off in-app purchase. Fast Math asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.4 for Calcul Mental in Space against 4.4 for Fast Math. That said, the two scores are not equally well evidenced: Calcul Mental in Space has 576 ratings behind it against 84, so its average is the more settled of the two. Written reviews are what separate them: 71% of Calcul Mental in Space's written reviews are positive against 25% of Fast Math's.

Calcul Mental in Space ships an update every 6 days, Fast Math fortnightly. The most recent releases landed on November 9, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Calcul Mental in Space | Fast Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (576 ratings)](https://appshunter.io/ios/app/calcul-mental-in-space/id1510484802/reviews)** | [4.4 (84 ratings)](https://appshunter.io/ios/app/fast-math-brain-training/id1539556236/reviews) |
| Number of ratings | **576** | 84 |
| Positive reviews | **71.4% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 6 days** | Fortnightly |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 134 MB | 8 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Huy Le](https://appshunter.io/developer/1279607371) | [Zhengzhou Sibo Intelligent Technology Co., Ltd.](https://appshunter.io/developer/803144645) |

## What reviewers say

### Calcul Mental in Space

[App page](https://appshunter.io/ios/app/calcul-mental-in-space/id1510484802)

Practice mental math with a fun, space-themed game. Improve your calculation speed, reflexes, and math skills through engaging challenges. Master addition, subtraction, multiplication, and division with increasing difficulty levels.

**Highlights:** Mental math practice, Speed and reflex training, Addition, subtraction, multiplication, division, Times and division tables review, Progressive difficulty levels, Achievement encouragement

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Premium | $2.99 | one-time |


### Fast Math

[App page](https://appshunter.io/ios/app/fast-math-brain-training/id1539556236)

Test your mental agility with rapid-fire math challenges. Quickly decide if presented equations are correct or incorrect under tight time constraints. It's a fast-paced game designed to sharpen your quick thinking and calculation skills.

**Highlights:** Rapid math problem solving, Time-sensitive judgments, Quick decision making, Brain training exercises, Simple interface

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calcul Mental in Space free?

Calcul Mental in Space is free to download, with in-app purchases available.

### Is Fast Math free?

Fast Math is free to download, with no in-app purchases.

### Which has better reviews, Calcul Mental in Space or Fast Math?

Calcul Mental in Space is rated higher. Calcul Mental in Space averages 4.4 out of 5 from 576 ratings, while Fast Math averages 4.4 from 84 ratings.

### Do Calcul Mental in Space or Fast Math have ads?

Both Calcul Mental in Space and Fast Math show ads.

### Which is updated more often, Calcul Mental in Space or Fast Math?

Calcul Mental in Space ships an update every 6 days, and Fast Math fortnightly. Most recently, Calcul Mental in Space was updated on November 9, 2026 and Fast Math on November 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*