# tsubomaster vs AB Vitamin

The clearest difference is price: tsubomaster at Free against AB Vitamin's $2.99. AB Vitamin's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 6 months). On in-app purchases, device support and iOS requirement there is nothing between them.

tsubomaster is free to download; AB Vitamin costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

tsubomaster ships an update every 6 months, AB Vitamin every 3 weeks. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | tsubomaster | AB Vitamin |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Size | 9 MB | 7 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [JK-SCIENCE CO., LTD.](https://appshunter.io/developer/493464594) | [Alexander Berkovich](https://appshunter.io/developer/1460157188) |

## What reviewers say

### tsubomaster

[App page](https://appshunter.io/ios/app/tsubomaster/id493464591)

**Features:** macOS Compatibility

**In-app purchases:** none


### AB Vitamin

[App page](https://appshunter.io/ios/app/ab-vitamin/id1555871772)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is tsubomaster free?

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

### Is AB Vitamin free?

AB Vitamin costs $2.99, with no in-app purchases.

### Do tsubomaster or AB Vitamin have ads?

tsubomaster shows ads; AB Vitamin does not.

### Which is updated more often, tsubomaster or AB Vitamin?

tsubomaster ships an update every 6 months, and AB Vitamin every 3 weeks. Most recently, tsubomaster was updated on September 23, 2026 and AB Vitamin on September 26, 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.*