Comparison

Sleep Timer vs Sleep Calculator App

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

Head to head
About

Sleep Timer

This app helps you wake up feeling refreshed by tracking your sleep cycles. It calculates the optimal time to go to bed or wake up based on your sleep patterns and allows you to set an alarm for the ideal moment.

Highlights
  • Sleep cycle tracking
  • Optimal wake-up time calculation
  • Bedtime recommendations
  • One-click alarm setting
  • Growth Bundle integration
Read full description

*** THE #1 APP FOR SLEEP TRACKING *** Sleep is a sequence of several cycles, each lasting 1.5 hours. A good night sleep consists of 5-6 complete cycles. If you wake up in the middle of the cycle, you feel groggy and exhausted. Therefore, to feel refreshed and alert, it is important to wake up between cycles. Sleep Timer counts sleep cycles, taking into account the average time needed for a person to fall asleep (it is 14 minutes). With this app, you can find out when to go to bed, if you need to wake up at a certain time or when to wake up if you go to sleep right now. Then, in just one click, you can set up an alarm to wake up at the right time. --- Sleep Timer is also part of the Growth Bundle. Get discounted premium access to a bundle of the most popular productivity and lifestyle apps. See more under the Growth Bundle section in the app's settings. Sleep Timer contains subscription plans for its own Premium and the Growth Bundle - both of which are optional annual subscriptions. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period, for the chosen plan's price. Subscriptions may be managed and auto-renewal may be turned off by going to your iTunes/App Store Account Settings after purchase. Read our full Privacy Policy and Terms of Service here: Privacy Policy: https://growthbundle.com/privacy-policy Terms of Service: https://growthbundle.com/terms-of-service

About

Sleep Calculator App

Optimize your sleep by calculating ideal bedtime and wake-up times based on natural 90-minute sleep cycles. Includes relaxing sounds and meditation to help you fall asleep faster and wake up feeling refreshed.

Highlights
  • Calculate best bedtime
  • Calculate best wake-up time
  • Select desired wake-up time
  • Relaxing sounds
  • Sleep meditation
  • No registration required
Features
Read full description

A good day starts with a good night! Go to bed at the right time and wake up between your natural 90-minute sleep cycles to feel rested and refreshed. A good night's sleep consists of 3 to 6 complete cycles. ◦ Calculate your best bedtime ◦ Calculate your best wake-up time ◦ Select when you want to wake up ◦ Relaxing sounds and sleep meditation to help you fall asleep faster. The average person takes about 15 minutes to fall asleep. If you wake up at one of the calculated times, you'll wake up between 90-minute sleep cycles. The Sleep Calculator app helps you decide when to go to sleep so you can wake up at a specific time and ensure a good night's rest, or what time you should wake up if you want to go to sleep right now. Completely free app. No registration required. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://scannercalorieios2024.web.app/

Screenshots

Sleep Timer4 screens
Sleep Calculator App4 screens

Verdict

The call

The clearest difference is review sentiment: Sleep Timer at 57% against Sleep Calculator App's 0%. Sleep Timer also leads on rating (4.7 vs 3.0) and ads (none vs shown). Sleep Calculator App's advantage is monetization model (free with in-app purchases vs subscription). On price, in-app purchases, device support and iOS requirement 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 Timer sells 10 in-app purchases, starting at $1.99 per 7 days and Sleep Calculator App 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 Timer holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Sleep Timer has 1.5K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 57% of Sleep Timer's written reviews are positive against 0% of Sleep Calculator App's.

UpkeepUpdate frequency

Sleep Timer ships an update every 2 months, Sleep Calculator App every 8 months. The most recent releases landed on October 26, 2026 and October 21, 2026 respectively.

Scorecard6 real differences · 4 level
Sleep Timer versus Sleep Calculator App: the parameters behind the verdict, then further details
ParameterSleep TimerSleep Calculator App
PriceFreeFree
Rating4.7 (1.5K ratings) — better3.0 (2 ratings)
Positive reviews56.7% of reviews — better0.0% of reviews
Number of ratings1.5K — better2
Update frequencyEvery 2 months — betterEvery 8 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.0 — better15.1
Further details — not scored
Size84 MB31 MB
Age rating4+4+
DeveloperKodeon, Inc.Luz Ochoa

Customer experience

Sleep Timer

All ratings1,457 ratings
Positive92.7%
Neutral3.0%
Negative4.4%
Written reviews157 reviews
Positive56.7%
Neutral12.7%
Negative30.6%

Sleep Calculator App

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

10 purchases

Sleep Timer

Subscriptions9
  • Week$1.997 Days
  • Week$2.997 Days
  • Month$5.991 Month
Show 6 more
  • Year$6.991 Year
  • Year$14.491 Year
  • Year3 Days trial$17.991 Year
  • Year3 Days trial$29.991 Year
  • Sleep Timer Premium1 Year trial2 variants$29.991 Year
  • Growth Bundle: Yearly1 Year trial$99.991 Year
One-time1
  • Upgrade to Premium$2.99
1 purchases

Sleep Calculator App

One-time1
  • Lifetime Premium Subscription$6.99

Questions

Is Sleep Timer free?
Sleep Timer is free to download, with in-app purchases available.
Is Sleep Calculator App free?
Sleep Calculator App is free to download, with in-app purchases available.
Which has better reviews, Sleep Timer or Sleep Calculator App?
Sleep Timer is rated higher. Sleep Timer averages 4.7 out of 5 from 1.5K ratings, while Sleep Calculator App averages 3.0 from 2 ratings.
Do Sleep Timer or Sleep Calculator App have ads?
Sleep Calculator App shows ads; Sleep Timer does not.
Which is updated more often, Sleep Timer or Sleep Calculator App?
Sleep Timer ships an update every 2 months, and Sleep Calculator App every 8 months. Most recently, Sleep Timer was updated on October 26, 2026 and Sleep Calculator App on October 21, 2026.

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