# Train Clock vs 心臓くん

The clearest difference is ads: Train Clock at none against 心臓くん's shown. 心臓くん's advantage is update cadence (daily vs every 23 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Train Clock ships an update every 23 months, 心臓くん daily. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Train Clock | 心臓くん |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 23 months | **Daily** |
| Size | 143 MB | 50 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [hiroyuki uchida](https://appshunter.io/developer/669938829) | [Ryo Matsuura](https://appshunter.io/developer/1884074412) |

## What reviewers say

### Train Clock

[App page](https://appshunter.io/ios/app/train-clock/id1097870845)

**In-app purchases:** none


### 心臓くん

[App page](https://appshunter.io/ios/app/bpm/id6766859295)

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

**In-app purchases:** none


## Frequently asked questions

### Is Train Clock free?

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

### Is 心臓くん free?

心臓くん is free to download, with no in-app purchases.

### Do Train Clock or 心臓くん have ads?

心臓くん shows ads; Train Clock does not.

### Which is updated more often, Train Clock or 心臓くん?

Train Clock ships an update every 23 months, and 心臓くん daily. Most recently, Train Clock was updated on September 30, 2026 and 心臓くん on September 29, 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.*