# Istel ECG vs Watch ECG Pro

The clearest difference is rating: Watch ECG Pro at 4.4 against Istel ECG's 3.0. Watch ECG Pro also leads on ratings volume (64 vs 1). Istel ECG's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Watch ECG Pro sells 3 in-app purchases, starting at $6.99 per 7 days. Istel ECG asks for nothing beyond the download.

Watch ECG Pro holds the better App Store score, 4.4 against 3.0. That said, the two scores are not equally well evidenced: Watch ECG Pro has 64 ratings behind it against 1, so its average is the more settled of the two.

Istel ECG ships an update every 3 months, Watch ECG Pro every 2 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Istel ECG | Watch ECG Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/istel-ecg/id1238398630/reviews) | **[4.4 (64 ratings)](https://appshunter.io/ios/app/watch-ecg-pro-deep-analysis/id1542744328/reviews)** |
| Number of ratings | 1 | **64** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 22 MB | 102 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Diagnosis S.A.](https://appshunter.io/developer/1238398629) | [Shenzhen Plus1Health Technology Co., Ltd](https://appshunter.io/developer/372583780) |

## What reviewers say

### Istel ECG

[App page](https://appshunter.io/ios/app/istel-ecg/id1238398630)

This application works with a compatible recorder to perform quick ECG tests. It displays heart electrical activity, stores measurement history, and allows for easy sharing of results. Configuration of device parameters and PDF export are also supported.

**Highlights:** Real-time ECG signal display, Measurement history tracking, Built-in browser for interpretation, Device parameter configuration, Export measurements to PDF, Share measurement results

**In-app purchases:** none


### Watch ECG Pro

[App page](https://appshunter.io/ios/app/watch-ecg-pro-deep-analysis/id1542744328)

Monitor your heart rhythm and analyze ECG data from wearables or patch recorders. Receive detailed feedback and practical tips for improving your physical health. This app is for informational purposes and not a substitute for professional medical advice.

**Highlights:** Analyze ECG from Apple Watch or patch recorder, Measure and analyze pulse rhythm with phone camera, Real-time ECG data capture via Bluetooth, Detect cardiac rhythm, AFib, tachycardia, bradycardia, Export PDF ECG analysis reports, Track heart rate and provide health tips

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Features 1 Week | $6.99 | per 7 days |
| Premium Features For 1 Year | $49.99 | per year |
| Premium Features (Permanent) | $129.99 | one-time |


## Frequently asked questions

### Is Istel ECG free?

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

### Is Watch ECG Pro free?

Watch ECG Pro is free to download, with in-app purchases available.

### Which has better reviews, Istel ECG or Watch ECG Pro?

Watch ECG Pro is rated higher. Istel ECG averages 3.0 out of 5 from 1 ratings, while Watch ECG Pro averages 4.4 from 64 ratings.

### Do Istel ECG or Watch ECG Pro have ads?

Watch ECG Pro shows ads; Istel ECG does not.

### Which is updated more often, Istel ECG or Watch ECG Pro?

Istel ECG ships an update every 3 months, and Watch ECG Pro every 2 months. Most recently, Istel ECG was updated on November 6, 2026 and Watch ECG Pro on November 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.*