# Busy Binary vs Prime Nerd

The clearest difference is update cadence: Prime Nerd at every 3 days against Busy Binary's every 6 weeks. Busy Binary's advantage is device support (3 vs 1) and iOS requirement (9.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Busy Binary ships an update every 6 weeks, Prime Nerd every 3 days. The most recent releases landed on October 6, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Busy Binary | Prime Nerd |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/busy-binary/id1273591168/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | Ad-supported | Ad-supported |
| Size | 180 MB | 50 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [teruhisa nagato](https://appshunter.io/developer/1034153997) | [Hiroki Sekimoto](https://appshunter.io/developer/1877884860) |

## 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


### Prime Nerd

[App page](https://appshunter.io/ios/app/prime-nerd/id6760544446)

Tap prime numbers as they float across the screen within a time limit. This speed math game offers multiple difficulty levels, a combo system for score multipliers, and a training mode to hone your skills. Compete globally on the leaderboard and customize your challenge with digit selection.

**Highlights:** Identify prime numbers, Timed challenges, Global leaderboard, Multiple difficulty levels, Combo score multiplier, Training mode, Dark/Light theme

**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 Prime Nerd free?

Prime Nerd is free to download, with no in-app purchases.

### Do Busy Binary or Prime Nerd have ads?

Both Busy Binary and Prime Nerd show ads.

### Which is updated more often, Busy Binary or Prime Nerd?

Busy Binary ships an update every 6 weeks, and Prime Nerd every 3 days. Most recently, Busy Binary was updated on October 6, 2026 and Prime Nerd on October 11, 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.*