# True or False Math vs Calcul Mental in Space

The clearest difference is rating: Calcul Mental in Space at 4.4 against True or False Math's 3.8. Calcul Mental in Space also leads on update cadence (every 6 days vs every 17 months) and ratings volume (575 vs 13). True or False Math's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, review sentiment, in-app purchases and device support there is nothing between them.

Both are free to download. True or False Math sells 1 one-off in-app purchase and Calcul Mental in Space sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Calcul Mental in Space holds the better App Store score, 4.4 against 3.8. That said, the two scores are not equally well evidenced: Calcul Mental in Space has 575 ratings behind it against 13, so its average is the more settled of the two. Written reviews split almost evenly too, at 79% and 79% positive.

True or False Math ships an update every 17 months, Calcul Mental in Space every 6 days. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | True or False Math | Calcul Mental in Space |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (13 ratings)](https://appshunter.io/ios/app/true-or-false-math/id742047523/reviews) | **[4.4 (575 ratings)](https://appshunter.io/ios/app/calcul-mental-in-space/id1510484802/reviews)** |
| Number of ratings | 13 | **575** |
| Positive reviews | **79.4% of reviews** | 78.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 17 months | **Every 6 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 134 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Peter Li](https://appshunter.io/developer/424298074) | [Huy Le](https://appshunter.io/developer/1279607371) |

## What reviewers say

### True or False Math

[App page](https://appshunter.io/ios/app/true-or-false-math/id742047523)

Test your mental math skills in a fast-paced, one-minute challenge. Solve basic arithmetic problems by quickly identifying if they are true or false. Compete with others on leaderboards and unlock achievements.

**Highlights:** One-minute timed challenges, True/False math problem solving, Basic arithmetic operations (+, -, ×, ÷), Leaderboard competition, Achievement unlocking, Game Center integration

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| REMOVE ADS (True or False Math) | $0.99 | one-time |


### 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 |


## Frequently asked questions

### Is True or False Math free?

True or False Math is free to download, with in-app purchases available.

### Is Calcul Mental in Space free?

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

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

Calcul Mental in Space is rated higher. True or False Math averages 3.8 out of 5 from 13 ratings, while Calcul Mental in Space averages 4.4 from 575 ratings.

### Do True or False Math or Calcul Mental in Space have ads?

Calcul Mental in Space shows ads; True or False Math does not.

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

True or False Math ships an update every 17 months, and Calcul Mental in Space every 6 days. Most recently, True or False Math was updated on October 24, 2026 and Calcul Mental in Space on October 27, 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.*