# DS Heart Rate vs ChiMaster App

The clearest difference is in-app purchases: ChiMaster App at none against DS Heart Rate's 1. ChiMaster App also leads on update cadence (every 11 days vs every 85 months) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. DS Heart Rate sells 1 one-off in-app purchase. ChiMaster App asks for nothing beyond the download.

DS Heart Rate ships an update every 85 months, ChiMaster App every 11 days. The most recent releases landed on October 8, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | DS Heart Rate | ChiMaster App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 85 months | **Every 11 days** |
| Size | 3 MB | 38 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [思迪 李](https://appshunter.io/developer/1448600251) | [Med Bait OOO](https://appshunter.io/developer/1530451124) |

## What reviewers say

### DS Heart Rate

[App page](https://appshunter.io/ios/app/ds-heart-rate-pulse-tracker/id1450171413)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $1.99 | one-time |


### ChiMaster App

[App page](https://appshunter.io/ios/app/chimaster-app/id1530451122)

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

**In-app purchases:** none


## Frequently asked questions

### Is DS Heart Rate free?

DS Heart Rate is free to download, with in-app purchases available.

### Is ChiMaster App free?

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

### Do DS Heart Rate or ChiMaster App have ads?

Neither DS Heart Rate nor ChiMaster App shows ads.

### Which is updated more often, DS Heart Rate or ChiMaster App?

DS Heart Rate ships an update every 85 months, and ChiMaster App every 11 days. Most recently, DS Heart Rate was updated on October 8, 2026 and ChiMaster App on October 3, 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.*