# Count Doku vs 2 Keys

The clearest difference is review sentiment: 2 Keys at 100% against Count Doku's 50%. 2 Keys also leads on in-app purchases (none vs 8) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Count Doku sells 8 one-off in-app purchases. 2 Keys asks for nothing beyond the download.

Count Doku ships an update every 3 weeks, 2 Keys every 5 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Count Doku | 2 Keys |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/count-doku-mental-math-games/id6474322246/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 38 MB | 88 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Digiruu](https://appshunter.io/developer/1549213591) | [Visual Theory Ltd](https://appshunter.io/developer/1771285448) |

## What reviewers say

### Count Doku

[App page](https://appshunter.io/ios/app/count-doku-mental-math-games/id6474322246)

This game offers a fun and easy way to practice mental arithmetic, including addition, subtraction, multiplication, and division. It uses a unique approach to enhance problem-solving skills and understanding of mathematical relationships in short, daily sessions.

**Highlights:** Mental math practice, Addition, subtraction, multiplication, division, Creative problem-solving, Short daily sessions, Unlimited levels, Minimalist design

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pocket of Coins | $0.99 | one-time |
| Get 5 Hints | $0.99 | one-time |
| Get 15 Hints | $1.99 | one-time |
| Get 5 Hints and Remove Ads | $1.99 | one-time |
| Pouch of Coins | $2.99 | one-time |
| Get 40 Hints | $4.99 | one-time |
| Chest of Coins | $5.99 | one-time |
| Vault of Coins | $9.99 | one-time |


### 2 Keys

[App page](https://appshunter.io/ios/app/2-keys/id6740829929)

This rhythm-based game challenges players to control two pianos simultaneously. Collect specific keys while avoiding others, requiring focus and coordination. It's a fun brain workout for all ages, especially beneficial for pianists.

**Highlights:** Control two pianos at once, Collect keys, avoid obstacles, Boost hand coordination, Fast-paced gameplay, Train reflexes and concentration, Suitable for all ages

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

**In-app purchases:** none


## Frequently asked questions

### Is Count Doku free?

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

### Is 2 Keys free?

2 Keys is free to download, with no in-app purchases.

### Do Count Doku or 2 Keys have ads?

Count Doku shows ads; 2 Keys does not.

### Which is updated more often, Count Doku or 2 Keys?

Count Doku ships an update every 3 weeks, and 2 Keys every 5 days. Most recently, Count Doku was updated on October 21, 2026 and 2 Keys on October 24, 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.*