# Sleepm vs Fourthzone

The clearest difference is update cadence: Fourthzone at every 3 weeks against Sleepm's every 5 months. Sleepm's advantage is iOS requirement (9.0 vs 16.0). 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.

Sleepm ships an update every 5 months, Fourthzone every 3 weeks. The most recent releases landed on September 29, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Sleepm | Fourthzone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sleepm/id6470255913/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 44 MB | 194 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [SLEEPM GLOBAL INC](https://appshunter.io/developer/1692279167) | [FOURTHZONE LIMITED](https://appshunter.io/developer/6785445065) |

## What reviewers say

### Sleepm

[App page](https://appshunter.io/ios/app/sleepm/id6470255913)

This app connects to smart sleep devices to monitor your sleep in real-time. It provides detailed sleep reports and uses a smart light with music to help you fall asleep.

**Highlights:** Real-time sleep status monitoring, Sleep reports, Smart light with music, Connects to sleep buttons, lights, and smart bedding

**Features:** macOS Compatibility

**In-app purchases:** none


### Fourthzone

[App page](https://appshunter.io/ios/app/fourthzone/id6785445063)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sleepm free?

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

### Is Fourthzone free?

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

### Do Sleepm or Fourthzone have ads?

Neither Sleepm nor Fourthzone shows ads.

### Which is updated more often, Sleepm or Fourthzone?

Sleepm ships an update every 5 months, and Fourthzone every 3 weeks. Most recently, Sleepm was updated on September 29, 2026 and Fourthzone on October 4, 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.*