NapBot vs zZz
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NapBot
Automatically track and analyze your sleep cycles using on-device machine learning. Gain insights into sleep phases, heart rate, and environmental sound exposure to understand and improve your sleep quality. Access historical data and trends with a PRO subscription.
- Automatic sleep tracking
- Detailed sleep phase analysis
- Environmental sound exposure analysis
- Sleep heart rate summary
- Sleep history overview
- Sleep trend tracking
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NapBot is an automatic sleep tracking and analyzing app for your iOS and watchOS devices. It uses on-device Machine Learning to detect and understand your sleep. * Sleep Tracking NapBot uses machine learning to automatically track your sleep. * Detailed Sleep Analysis NapBot presents detailed sleep phases analysis by calculating deep and light phases. * Environmental Sound Exposure NapBot analyzes your Environmental Sound Exposure to understand how it affects your sleep quality. * Sleep Heart Rate NapBot presents a sleep Heart Rate summary chart based on your HR zones. PRO Features: * Sleep History Gain insight into your full sleep history in beautifully designed overviews. * Sleep Trends Track your sleep trends to understand how new habits influence your sleep. This app requires an iPhone that has the Health App installed and Apple Watch. Heart readings are read from the Health Data Store which is populated by your Apple Watch. Subscription information Your payment will be charged to your iTunes Account as soon as you confirm your purchase. You can manage your subscriptions and turn off auto-renewal from your Account Settings after the purchase. Your subscription will renew automatically unless you turn off auto-renew at least 24 hours before the end of the current period. The cost of renewal will be charged to your account in 24 hours prior to the end of the current period. When canceling a subscription, your subscription will stay active until the end of the period. Auto-renewal will be disabled, but the current subscription will not be refunded. Any unused portion of a free trial period, if offered, will be forfeited when purchasing a subscription. Terms & Privacy Policy: https://napbot.swiftwithmajid.com/privacy
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.
- One-tap sleep logging
- Home and lock screen widgets
- Tracks time in bed, awake, and sleep
- Syncs with Apple Health
- Siri and Shortcuts integration
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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
Verdict
The clearest difference is rating: NapBot at 4.2 against zZz's 2.9. NapBot also leads on ratings volume (6.3K vs 11) and review sentiment (21% vs 0%). zZz's advantage is update cadence (every 4 days vs every 11 days). On price, ads, in-app purchases and monetization model 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. NapBot sells 2 in-app purchases, starting at $4.99 per month and zZz sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
NapBot holds the better App Store score, 4.2 against 2.9. That said, the two scores are not equally well evidenced: NapBot has 6.3K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 21% of NapBot's written reviews are positive against 0% of zZz's.
NapBot ships an update every 11 days, zZz every 4 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | NapBot | zZz |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (6.3K ratings) — better | 2.9 (11 ratings) |
| Positive reviews | 20.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 6.3K — better | 11 |
| Update frequency | Every 11 days | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 16 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Majid Jabrayilov | Florian Schweizer |
Customer experience
NapBot
zZz
Bugs and requests
NapBot
Reported bugs
4 issues- App crashes after purchasing pro version
- Sleep data not syncing or disappearing
- Incorrect time zone and sleep duration displayed
- Fails to track sleep at all on some nights
Requested features
4 requests- Add ability to manually edit or delete sleep data
- Improve accuracy of sleep tracking
- Provide more detailed sleep analytics and insights
- Offer a one-time purchase option instead of subscription
zZz
Not enough reviews yet to summarise bugs or requests.
In-app purchases
NapBot
- NapBot PRO Monthly$4.991 Month
- NapBot PRO Annual7 Days trial$29.991 Year
zZz
- Pro Tier$0.99









