Sleepm vs Fourthzone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sleepm
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.
- Real-time sleep status monitoring
- Sleep reports
- Smart light with music
- Connects to sleep buttons, lights, and smart bedding
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The Seepm App supports the connection of sleep buttons, sleep lights, and smart bedding, which can help you monitor your personal real-time sleep status, view sleep reports, and also use the sleep light to play music and light to aid sleep.
Fourthzone
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Book classes, wellbeing experiences and restorative sessions with Fourthzone – intentional wellbeing, your way. More than a fitness app, Fourthzone is your gateway to a carefully curated wellbeing experience designed to support movement, healing, mindset and meaningful connection. Use the app to explore and book classes, wellbeing experiences and restorative sessions that help you feel stronger, calmer and more connected to yourself. With the Fourthzone app you can: • View and book classes and events • Manage your schedule with ease • Discover movement, recovery and wellbeing experiences • Stay connected with the Fourthzone community • Receive updates on new classes, workshops and events • Access important studio information and opening hours Whether you're seeking strength, stillness, restoration or personal growth, Fourthzone provides a space where wellbeing is approached with intention. Designed to support your whole self.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Sleepm | Fourthzone |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 9.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 44 MB | 194 MB |
| Age rating | 17+ | 4+ |
| Developer | SLEEPM GLOBAL INC | FOURTHZONE LIMITED |
In-app purchases
Sleepm
No in-app purchases
Fourthzone
No in-app purchases









