Comparison

Sleep++ vs zZz

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

Head to head
About

Sleep++

This app automatically tracks your sleep duration and quality using your Apple Watch. Gain insights into your rest patterns to improve your sleep routines. Offers both automatic and manual tracking options for personalized control.

Highlights
  • Automatic sleep tracking
  • Sleep duration measurement
  • Sleep quality analysis
  • Manual sleep tracking
  • Health App integration
  • Detailed nightly reports
Read full description

Use your Apple Watch to AUTOMATICALLY track your sleep! Sleep++ takes advantage of the motion and health monitoring capabilities of your Apple Watch to measure both the duration and quality of your sleep. The better you understand how well you are sleeping the more you are able to make changes in your routines to benefit your rest. Simply wear your Apple Watch overnight and each morning Sleep++ will analyze your sleep and give you a report about how long and restfully you slept. NOTES: Sleep++ integrates with the Health App providing you a safe and private way to share your activity data with Sleep++. This data is used for automatic sleep tracking. You can also optionally have Sleep++ save your Sleep Analysis into your Health database after each night.

About

zZz

Easily log your sleep with a single tap using home or lock screen widgets. Track time in bed, awake time, and actual sleep duration, syncing data with Apple Health for insightful analysis.

Highlights
  • One-tap sleep logging
  • Home and lock screen widgets
  • Tracks time in bed, awake, and sleep
  • Syncs with Apple Health
  • Siri and Shortcuts integration
Read full description

One Tap and your sleep schedule is tracked. Add a small widget to your home or lock screen, tap it before going to bed and after waking up and your sleep is tracked. It doesn't get any easier than this. Widgets: • Go to bed • I just woke up • Used to track your sleep as easy as possible Shortcuts & Siri: • Go to bed • I just woke up • Used to track your sleep as easy as possible via Siri, Shortcuts or Automations • Activate in the zZz settings Your time in bed, time awake (the duration before you fall asleep) and your actual sleeping time is saved to Apple Health. The same data is also read from Apple Health to give you great insights into your sleeping schedules.

Screenshots

Sleep++4 screens
zZz4 screens

Verdict

The call

The clearest difference is rating: Sleep++ at 4.1 against zZz's 2.9. Sleep++ also leads on review sentiment (39% vs 0%) and ratings volume (5.7K vs 11). zZz's advantage is ads (none vs shown) and update cadence (every 4 days vs every 2 months). On price, in-app purchases, monetization model 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. Sleep++ sells 1 one-off in-app purchase and zZz sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sleep++ holds the better App Store score, 4.1 against 2.9. That said, the two scores are not equally well evidenced: Sleep++ has 5.7K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 39% of Sleep++'s written reviews are positive against 0% of zZz's.

UpkeepUpdate frequency

Sleep++ ships an update every 2 months, zZz every 4 days. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

Scorecard6 real differences · 4 level
Sleep++ versus zZz: the parameters behind the verdict, then further details
ParameterSleep++zZz
PriceFreeFree
Rating4.1 (5.7K ratings) — better2.9 (11 ratings)
Positive reviews38.6% of reviews — better0.0% of reviews
Number of ratings5.7K — better11
Update frequencyEvery 2 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS26.016.0 — better
Further details — not scored
Size11 MB6 MB
Age rating4+4+
DeveloperCross Forward Consulting, LLCFlorian Schweizer

Customer experience

Sleep++

All ratings5,653 ratings
Positive76.2%
Neutral9.0%
Negative14.8%
Written reviews868 reviews
Positive38.6%
Neutral15.8%
Negative45.6%

zZz

All ratings11 ratings
Positive45.5%
Neutral0.0%
Negative54.5%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Sleep++

Reported bugs

4 issues
  • Doubles data on some nights
  • Misses some nights of sleep
  • Incorrectly records awake time as sleep
  • Stops working after iOS updates

Requested features

5 requests
  • Add sleep diary
  • Include pre-sleep factors
  • Graph core sleep, deep sleep, and REM over time
  • Add alarm that wakes during light sleep
  • Integrate with Fitbit data

zZz

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Sleep++

One-time1
  • Support Development$1.99
1 purchases

zZz

One-time1
  • Pro Tier$0.99

Questions

Is Sleep++ free?
Sleep++ is free to download, with in-app purchases available.
Is zZz free?
zZz is free to download, with in-app purchases available.
Which has better reviews, Sleep++ or zZz?
Sleep++ is rated higher. Sleep++ averages 4.1 out of 5 from 5.7K ratings, while zZz averages 2.9 from 11 ratings.
Do Sleep++ or zZz have ads?
Sleep++ shows ads; zZz does not.
Which is updated more often, Sleep++ or zZz?
Sleep++ ships an update every 2 months, and zZz every 4 days. Most recently, Sleep++ was updated on October 19, 2026 and zZz on October 14, 2026.

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