# weECG vs FourierSleep

The clearest difference is in-app purchases: weECG at none against FourierSleep's 1. weECG also leads on device support (3 vs 1) and iOS requirement (11.0 vs 17.0). FourierSleep's advantage is update cadence (daily vs every 8 months). On price and ads there is nothing between them.

Both are free to download. FourierSleep sells 1 one-off in-app purchase. weECG asks for nothing beyond the download.

weECG ships an update every 8 months, FourierSleep daily. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | weECG | FourierSleep |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Daily** |
| Size | 24 MB | 18 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [borsam Biomedical](https://appshunter.io/developer/839314648) | [TANG CHENGJUN](https://appshunter.io/developer/1887430333) |

## What reviewers say

### weECG

[App page](https://appshunter.io/ios/app/weecg/id6470260121)

**Features:** macOS Compatibility

**In-app purchases:** none


### FourierSleep

[App page](https://appshunter.io/ios/app/fouriersleep/id6761359040)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock PRO | $4.99 | one-time |


## Frequently asked questions

### Is weECG free?

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

### Is FourierSleep free?

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

### Do weECG or FourierSleep have ads?

Neither weECG nor FourierSleep shows ads.

### Which is updated more often, weECG or FourierSleep?

weECG ships an update every 8 months, and FourierSleep daily. Most recently, weECG was updated on October 8, 2026 and FourierSleep on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*