# 13 vs Brain training through math

The clearest difference is in-app purchases: Brain training through math at none against 13's 1. Brain training through math also leads on ads (none vs shown). 13's advantage is iOS requirement (12.6 vs 15.6). On price and device support there is nothing between them.

Both are free to download. 13 sells 1 one-off in-app purchase. Brain training through math asks for nothing beyond the download.

## The numbers

| Metric | 13 | Brain training through math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (31 ratings)](https://appshunter.io/ios/app/13-the-game/id1458483490/reviews)** | — |
| Number of ratings | **31** | — |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 11 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 51 MB | 45 MB |
| Requires iOS | **12.6** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PLAYTOUCH](https://appshunter.io/developer/608330754) | [Iuliia Ianalina](https://appshunter.io/developer/1807541065) |

## What reviewers say

### 13

[App page](https://appshunter.io/ios/app/13-the-game/id1458483490)

A simple yet challenging puzzle game where players merge adjacent similar boxes to reach the number 13. It's easy to learn but difficult to master, with only a small percentage of players achieving the ultimate goal.

**Highlights:** Merge adjacent similar boxes, Goal: Create a box with the number 13, Simple gameplay mechanics, Challenging difficulty, Puzzle-based

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove all ADS from the game | $1.99 | one-time |


### Brain training through math

[App page](https://appshunter.io/ios/app/brain-training-through-math/id6744409630)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 13 free?

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

### Is Brain training through math free?

Brain training through math is free to download, with no in-app purchases.

### Do 13 or Brain training through math have ads?

13 shows ads; Brain training through math does not.

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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.*