# Smooth Breath vs THOTH ECG

The clearest difference is update cadence: THOTH ECG at every 8 months against Smooth Breath's every 60 months. THOTH ECG also leads on iOS requirement (13.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Smooth Breath ships an update every 60 months, THOTH ECG every 8 months. The most recent releases landed on September 20, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Smooth Breath | THOTH ECG |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 60 months | **Every 8 months** |
| Size | 0 MB | 5 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Koral Oztan Schemel](https://appshunter.io/developer/1072267156) | [索思(苏州)医疗科技有限公司](https://appshunter.io/developer/1425728935) |

## What reviewers say

### Smooth Breath

[App page](https://appshunter.io/ios/app/smooth-breath/id1072267157)

**Features:** macOS Compatibility

**In-app purchases:** none


### THOTH ECG

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Smooth Breath free?

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

### Is THOTH ECG free?

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

### Do Smooth Breath or THOTH ECG have ads?

Neither Smooth Breath nor THOTH ECG shows ads.

### Which is updated more often, Smooth Breath or THOTH ECG?

Smooth Breath ships an update every 60 months, and THOTH ECG every 8 months. Most recently, Smooth Breath was updated on September 20, 2026 and THOTH ECG on September 18, 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.*