# Heart Rate PRO vs NDSR355A

The clearest difference is price: NDSR355A at Free against Heart Rate PRO's $2.99. NDSR355A also leads on iOS requirement (9.0 vs 11.3). Heart Rate PRO's advantage is update cadence (every 6 weeks vs every 10 months). On ads, in-app purchases and device support there is nothing between them.

NDSR355A is free to download; Heart Rate PRO costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Heart Rate PRO ships an update every 6 weeks, NDSR355A every 10 months. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Heart Rate PRO | NDSR355A |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.2 (758 ratings)](https://appshunter.io/ios/app/heart-rate-pro/id1063248233/reviews)** | — |
| Number of ratings | **758** | — |
| Positive reviews | 10.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 10 months |
| Monetization | Free | — |
| Size | 23 MB | 39 MB |
| Requires iOS | 11.3 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aexol Studio](https://appshunter.io/developer/1711767918) | [Guangzhou Aidan Blessindo Electronic Co.,Ltd.](https://appshunter.io/developer/1413008258) |

## What reviewers say

### Heart Rate PRO

[App page](https://appshunter.io/ios/app/heart-rate-pro/id1063248233)

Transform your iPhone into a personal heart rate monitor. Track your pulse anytime, anywhere without additional hardware. Ideal for monitoring your physical and mental condition.

**Highlights:** Measure heart rate without extra devices, Track resting heart rate, Monitor heart rate before/during/after workouts, Uses iPhone camera and flashlight, Simple finger placement method

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

**In-app purchases:** none

**What reviewers like**

- 👍 App works well
- 💡 Accurate heart rate measurements

**What reviewers complain about**

- 🐛 Compatibility issues with newer iPhone models
- 🔋 App crashes or stops working
- 💸 Ads in paid 'Pro' version
- 🤔 Inconsistent performance

**Reported bugs**

- App unable to detect finger
- Measurements not saving
- Crashes during use

**Requested features**

- Integration with Apple Health
- Continuous heart rate monitoring mode
- Export data for analysis


### NDSR355A

[App page](https://appshunter.io/ios/app/ndsr355a/id6449562008)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Heart Rate PRO free?

Heart Rate PRO costs $2.99, with no in-app purchases.

### Is NDSR355A free?

NDSR355A is free to download, with no in-app purchases.

### Do Heart Rate PRO or NDSR355A have ads?

Neither Heart Rate PRO nor NDSR355A shows ads.

### Which is updated more often, Heart Rate PRO or NDSR355A?

Heart Rate PRO ships an update every 6 weeks, and NDSR355A every 10 months. Most recently, Heart Rate PRO was updated on October 24, 2026 and NDSR355A on October 14, 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.*