# Busy Binary vs 直感素数

The clearest difference is rating: 直感素数 at 5.0 against Busy Binary's 4.5. 直感素数 also leads on update cadence (weekly vs every 6 weeks). Busy Binary's advantage is iOS requirement (9.0 vs 13.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

直感素数 holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Busy Binary ships an update every 6 weeks, 直感素数 weekly. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Busy Binary | 直感素数 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/busy-binary/id1273591168/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/id6461164718/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | — | 71.4% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 180 MB | 34 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [teruhisa nagato](https://appshunter.io/developer/1034153997) | [Larry Works](https://appshunter.io/developer/1701632846) |

## What reviewers say

### Busy Binary

[App page](https://appshunter.io/ios/app/busy-binary/id1273591168)

Test your brain with a number conversion game. Convert binary to decimal in timed challenges or practice modes. Compete with others for high scores.

**Highlights:** Binary to Decimal Conversion, Training Mode, Challenge Mode, Difficulty Levels (Easy, Normal, Hard), Combo System, Global Ranking System

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

**In-app purchases:** none


### 直感素数

[App page](https://appshunter.io/ios/app/id6461164718)

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

**In-app purchases:** none


## Frequently asked questions

### Is Busy Binary free?

Busy Binary is free to download, with no in-app purchases.

### Is 直感素数 free?

直感素数 is free to download, with no in-app purchases.

### Which has better reviews, Busy Binary or 直感素数?

直感素数 is rated higher. Busy Binary averages 4.5 out of 5 from 2 ratings, while 直感素数 averages 5.0 from 3 ratings.

### Do Busy Binary or 直感素数 have ads?

Both Busy Binary and 直感素数 show ads.

### Which is updated more often, Busy Binary or 直感素数?

Busy Binary ships an update every 6 weeks, and 直感素数 weekly. Most recently, Busy Binary was updated on October 6, 2026 and 直感素数 on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*