# Busy Binary vs Hydrogen Voice H2

The clearest difference is update cadence: Hydrogen Voice H2 at every 2 days against Busy Binary's every 6 weeks. Busy Binary's advantage is iOS requirement (9.0 vs 13.0). 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, Hydrogen Voice H2 every 2 days. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Busy Binary | Hydrogen Voice H2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/busy-binary/id1273591168/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 2 days** |
| Monetization | Ad-supported | Ad-supported |
| Size | 180 MB | 110 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) | [KAEDE Games](https://appshunter.io/developer/1511783814) |

## 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


### Hydrogen Voice H2

[App page](https://appshunter.io/ios/app/hydrogen-voice-h2/id6473839795)

This app demonstrates the creation of hydrogen water using a special stick. It shows how the stick releases hydrogen bubbles into water and highlights the quantity of hydrogen water that can be produced.

**Highlights:** Hydrogen water creation demonstration, Visual display of hydrogen bubbles, Information on production volume, Highlights the use of a hydrogen stick, Shows how to use the product

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Busy Binary free?

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

### Is Hydrogen Voice H2 free?

Hydrogen Voice H2 is free to download, with no in-app purchases.

### Do Busy Binary or Hydrogen Voice H2 have ads?

Both Busy Binary and Hydrogen Voice H2 show ads.

### Which is updated more often, Busy Binary or Hydrogen Voice H2?

Busy Binary ships an update every 6 weeks, and Hydrogen Voice H2 every 2 days. Most recently, Busy Binary was updated on October 6, 2026 and Hydrogen Voice H2 on October 5, 2026.

---

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