# Calcul Mental in Space vs Ready Math

Calcul Mental in Space and Ready Math both sit at 4.4 stars, but that hides the real split: 79% of Calcul Mental in Space's written reviews are positive against 29% of Ready Math's. Calcul Mental in Space also leads on update cadence (every 6 days vs every 2 months). Ready Math's advantage is ads (none vs shown). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Calcul Mental in Space sells 1 one-off in-app purchase and Ready Math sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.4 for Calcul Mental in Space against 4.5 for Ready Math. Both are backed by a comparable volume of ratings — 576 and 712 respectively. Written reviews are what separate them: 79% of Calcul Mental in Space's written reviews are positive against 29% of Ready Math's.

Calcul Mental in Space ships an update every 6 days, Ready Math every 2 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Calcul Mental in Space | Ready Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (576 ratings)](https://appshunter.io/ios/app/calcul-mental-in-space/id1510484802/reviews) | **[4.5 (712 ratings)](https://appshunter.io/ios/app/ready-math/id1584476382/reviews)** |
| Number of ratings | 576 | **712** |
| Positive reviews | **78.9% of reviews** | 28.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 6 days** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 134 MB | 382 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Huy Le](https://appshunter.io/developer/1279607371) | [Mehdi Tihadi](https://appshunter.io/developer/1578579408) |

## 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 |


### Ready Math

[App page](https://appshunter.io/ios/app/ready-math/id1584476382)

Engaging games designed to make learning math fun and accessible. Boost problem-solving skills and confidence through interactive activities covering counting to advanced challenges.

**Highlights:** Engaging math games, Learn faster, Build problem-solving skills, Counting to advanced challenges, Boost confidence, Practice and grow

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Math - Monthly subscription | $4.99 | per month |
| Math - subscription | $19.99 | per year |
| Math - Annual subscription | $49.99 | per year |
| Math - Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Calcul Mental in Space free?

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

### Is Ready Math free?

Ready Math is free to download, with in-app purchases available.

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

Ready Math is rated higher. Calcul Mental in Space averages 4.4 out of 5 from 576 ratings, while Ready Math averages 4.5 from 712 ratings.

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

Calcul Mental in Space shows ads; Ready Math does not.

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

Calcul Mental in Space ships an update every 6 days, and Ready Math every 2 months. Most recently, Calcul Mental in Space was updated on November 7, 2026 and Ready Math on November 3, 2026.

---

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