# B vs Aquarium Master

The clearest difference is update cadence: Aquarium Master at every 10 days against B's every 5 months. B's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

B ships an update every 5 months, Aquarium Master every 10 days. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | B | Aquarium Master |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 10 days** |
| Size | 95 MB | 47 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Hon Cho International Trade Co., Ltd.](https://appshunter.io/developer/1232497891) | [雨 梁](https://appshunter.io/developer/1218726051) |

## What reviewers say

### B

[App page](https://appshunter.io/ios/app/b-one/id1491640533)

**Features:** macOS Compatibility

**In-app purchases:** none


### Aquarium Master

[App page](https://appshunter.io/ios/app/aquarium-master/id6723864411)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is B free?

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

### Is Aquarium Master free?

Aquarium Master is free to download, with no in-app purchases.

### Do B or Aquarium Master have ads?

Neither B nor Aquarium Master shows ads.

### Which is updated more often, B or Aquarium Master?

B ships an update every 5 months, and Aquarium Master every 10 days. Most recently, B was updated on October 9, 2026 and Aquarium Master on October 7, 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.*