# Count Doku vs Number Orbit

The clearest difference is in-app purchases: Number Orbit at none against Count Doku's 8. Number Orbit also leads on ads (none vs shown) and update cadence (every 4 days vs every 3 weeks). Count Doku's advantage is iOS requirement (15.0 vs 17.6). On price and device support there is nothing between them.

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

Count Doku ships an update every 3 weeks, Number Orbit every 4 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Count Doku | Number Orbit |
| --- | --- | --- |
| 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 | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 38 MB | 5 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Digiruu](https://appshunter.io/developer/1549213591) | [William McRitchie](https://appshunter.io/developer/1823233240) |

## 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 |


### Number Orbit

[App page](https://appshunter.io/ios/app/number-orbit/id6764070976)

**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 Number Orbit free?

Number Orbit is free to download, with no in-app purchases.

### Do Count Doku or Number Orbit have ads?

Count Doku shows ads; Number Orbit does not.

### Which is updated more often, Count Doku or Number Orbit?

Count Doku ships an update every 3 weeks, and Number Orbit every 4 days. Most recently, Count Doku was updated on October 21, 2026 and Number Orbit 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.*