Comparison

Sleepm vs Fourthzone

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Real-time sleep status monitoring
  • Sleep reports
  • Smart light with music
  • Connects to sleep buttons, lights, and smart bedding
Features
Read full description

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.

About

Fourthzone

Features
Read full description

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

Sleepm4 screens
Fourthzone3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard2 real differences · 7 level
Sleepm versus Fourthzone: the parameters behind the verdict, then further details
ParameterSleepmFourthzone
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 5 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS9.0 — better16.0
Further details — not scored
Size44 MB194 MB
Age rating17+4+
DeveloperSLEEPM GLOBAL INCFOURTHZONE LIMITED

In-app purchases

None

Sleepm

No in-app purchases

None

Fourthzone

No in-app purchases

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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