# THOTH ECG vs Heart Plot

The clearest difference is in-app purchases: THOTH ECG at none against Heart Plot's 1. THOTH ECG also leads on iOS requirement (13.0 vs 26.2). Heart Plot's advantage is update cadence (every 2 weeks vs every 8 months). On price, ads and device support there is nothing between them.

Both are free to download. Heart Plot sells 1 one-off in-app purchase. THOTH ECG asks for nothing beyond the download.

THOTH ECG ships an update every 8 months, Heart Plot every 2 weeks. The most recent releases landed on September 18, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | THOTH ECG | Heart Plot |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 weeks** |
| Size | 5 MB | 3 MB |
| Requires iOS | **13.0** | 26.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [索思(苏州)医疗科技有限公司](https://appshunter.io/developer/1425728935) | [Ole Luhrs](https://appshunter.io/developer/1880446879) |

## What reviewers say

### THOTH ECG

[App page](https://appshunter.io/ios/app/thoth-ecg/id6472871296)

**Features:** macOS Compatibility

**In-app purchases:** none


### Heart Plot

[App page](https://appshunter.io/ios/app/heart-plot/id6759740007)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Heart Plot Premium | $1.99 | one-time |


## Frequently asked questions

### Is THOTH ECG free?

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

### Is Heart Plot free?

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

### Do THOTH ECG or Heart Plot have ads?

Neither THOTH ECG nor Heart Plot shows ads.

### Which is updated more often, THOTH ECG or Heart Plot?

THOTH ECG ships an update every 8 months, and Heart Plot every 2 weeks. Most recently, THOTH ECG was updated on September 18, 2026 and Heart Plot on September 23, 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.*