Comparison

zZZ vs Gentle Smart Alarm

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

Head to head
About

zZZ

This app analyzes your sleep patterns using data from your Apple Watch and Apple Health. It provides detailed sleep stage diagrams, trends, and insights to help you understand and improve your sleep quality. Features include tracking sleep history, heart rate, and respiratory rate.

Highlights
  • Automatic sleep detection with Apple Watch
  • Detailed sleep stage analysis (Awake, REM, Core, Deep)
  • Sleep history tracking (Day, Week, Month, Custom)
  • Monitoring of heart rate and respiratory rate during sleep
  • Sleep quality rating and improvement suggestions
  • Watch app support
  • Privacy-focused data storage
Features
Read full description

zZZ - Sleep Tracker Sleep better with zZZ, your smart sleep assistant. We can analyze your sleep data automatically using your Apple Watch. We using sleep data with the Apple Health app on iPhone empowers you to better manage your sleep. Explore trends about your sleep and compare your sleep quality with many Apple Health metrics that affect sleep. Join us that have discovered the life-changing benefits of great sleep! Track your sleep - Wearing your Apple Watch during sleep. We will automatically detect and analyze your sleep. Analysis your sleep - Detailed sleep stage diagram (Awake, REM, Core Sleep, Deep Sleep) and sleep rate. - Show the percentage & duration of that More Sleep Info - Asleep & Awake time - Explore your sleep history with Day, Week, Month, and Custom Date - Sleeping wrist temperature, Sleeping heartbeat rate, Respiratory rate - Discover all aspects of your sleep Sleep Quality - Analyze your sleep and rate that.Find the bad days or nice dream days - Help you to improve your sleep Setting - Theme Setting - Widget - Notification - More App Icons - Share with friends Watch App - You can also use the app in your watch. Privacy by Design - We uses Apple’s HealthKit API which reads and writes data directly on your device only, and all of your data is stored locally, or on other devices which you enabled iCloud syncing. FINALLY, Wish you have a good night~

About

Gentle Smart Alarm

This smart alarm app uses your iPhone and Apple Watch to detect your light sleep phase for gentle wake-ups. It provides personalized sleep insights, customizable alarms, and seamless integration with your wearable devices to improve sleep quality.

Highlights
  • Smart sleep phase detection
  • Personalized sleep insights
  • Customizable alarm options
  • Foreground mode with auto-dimming
  • Apple Watch integration
  • Sleep health notifications
Features
Read full description

Better nights start with understanding your sleep. Wakey brings sleep tracking, smart alarms, personal insights, and a dream journal together in one thoughtfully designed app. Get to know your sleep habits, see how your routine changes over time, and make room for better rest. TRACK YOUR NIGHTS Keep track of your sleep duration, bedtimes, and wake-up times. Review your latest night or explore your history to see the patterns behind your rest. UNDERSTAND YOUR SLEEP SCORE See how sleep duration, bedtime timing, and the consistency of your routine contribute to your score. A clear breakdown helps you understand each part and see where there’s room to improve. SEE THE BIGGER PICTURE One night tells only part of the story. Explore trends and weekly summaries to understand how much rest you’re getting and how regularly you’re sleeping. WAKE YOUR WAY Start your morning with a smart alarm, or choose a standard alarm when you simply need a wake-up call without tracking your sleep. KEEP YOUR DREAMS CLOSE Capture your dreams before the details fade. Your dream journal gives those fleeting moments a place to stay, ready to revisit whenever curiosity calls. GET TO KNOW THE SCIENCE OF SLEEP Explore approachable articles about sleep, dreams, body clocks, caffeine, naps, and more. Discover what happens while you rest and how everyday habits can shape your nights. From your last thought at bedtime to your first moments awake, Wakey helps you get to know your sleep—one night at a time. Benefitial Links: Privacy Policy - https://www.synaptivetechnology.com/wakey-privacy-policy Terms & Conditions - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

zZZ4 screens
Gentle Smart Alarm4 screens

Verdict

The call

The clearest difference is in-app purchases: zZZ at none against Gentle Smart Alarm's 2. zZZ also leads on update cadence (every 2 days vs weekly). On price, review sentiment, ads 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. Gentle Smart Alarm sells 2 in-app purchases, starting at $1.99 per month. zZZ asks for nothing beyond the download.

UpkeepUpdate frequency

zZZ ships an update every 2 days, Gentle Smart Alarm weekly. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
zZZ versus Gentle Smart Alarm: the parameters behind the verdict, then further details
ParameterzZZGentle Smart Alarm
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 2 days — betterWeekly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS17.017.0
Further details — not scored
Size41 MB70 MB
Age rating12+12+
Developer子龙 郭Serkan Adiguzel

Customer experience

zZZ

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Gentle Smart Alarm

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews12 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

zZZ

No in-app purchases

2 purchases

Gentle Smart Alarm

Subscriptions2
  • Premium Features-Monthly Plan7 Days trial$1.991 Month
  • Premium Features - Annual Plan7 Days trial$14.991 Year

Questions

Is zZZ free?
zZZ is free to download, with no in-app purchases.
Is Gentle Smart Alarm free?
Gentle Smart Alarm is free to download, with in-app purchases available.
Do zZZ or Gentle Smart Alarm have ads?
Neither zZZ nor Gentle Smart Alarm shows ads.
Which is updated more often, zZZ or Gentle Smart Alarm?
zZZ ships an update every 2 days, and Gentle Smart Alarm weekly. Most recently, zZZ was updated on November 4, 2026 and Gentle Smart Alarm on October 30, 2026.

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