# Brain Training & Snake Math vs DD

The clearest difference is ads: DD at none against Brain Training & Snake Math's shown. DD also leads on update cadence (daily vs every 9 days) and iOS requirement (13 vs 15.6). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Brain Training & Snake Math sells 10 one-off in-app purchases and DD sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Brain Training & Snake Math ships an update every 9 days, DD daily. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Brain Training & Snake Math | DD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/brain-training-and-snake-math/id6747933654/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 9 MB |
| Requires iOS | 15.6 | **13** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ENES ARIKAN](https://appshunter.io/developer/1823481881) | [四川省与初电竞俱乐部有限公司](https://appshunter.io/developer/1669013411) |

## What reviewers say

### Brain Training & Snake Math

[App page](https://appshunter.io/ios/app/brain-training-and-snake-math/id6747933654)

This app blends classic snake and Tetris gameplay with math challenges. Solve equations by guiding a snake to correct answers or clearing blocks in falling puzzles. Collect characters and unlock achievements while improving your mental math skills.

**Highlights:** Math brain training with snake and Tetris gameplay, Three game modes: Snake, Tetris, and Quick Math, Collect 14 unique snake characters, 50 achievements and 36 collectible stickers, Supports addition, subtraction, multiplication, division, Offline play

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cool Penguin | $4.99 | one-time |
| Tommy Turtle | $4.99 | one-time |
| Cherry Skin | $4.99 | one-time |
| Honey Skin | $4.99 | one-time |
| Character Fox | $4.99 | one-time |
| Character Chick | $4.99 | one-time |
| Candy Skin | $4.99 | one-time |
| Merry Monkey | $4.99 | one-time |
| Crystal Skin | $4.99 | one-time |
| Rainbow Skin | $4.99 | one-time |


### DD

[App page](https://appshunter.io/ios/app/dd-knots-knotpuzzlechallenge/id6757379599)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP | $2.99 | per month |


## Frequently asked questions

### Is Brain Training & Snake Math free?

Brain Training & Snake Math is free to download, with in-app purchases available.

### Is DD free?

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

### Do Brain Training & Snake Math or DD have ads?

Brain Training & Snake Math shows ads; DD does not.

### Which is updated more often, Brain Training & Snake Math or DD?

Brain Training & Snake Math ships an update every 9 days, and DD daily. Most recently, Brain Training & Snake Math was updated on October 28, 2026 and DD on October 25, 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.*