Comparison

Sleep Calculator vs Sleep Calculator

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

Head to head
About

Sleep Calculator

Features
Read full description

Your Brain Needs Good Sleep to Stay Healthy Not getting enough quality sleep can really hurt your body and mind: - Forgetfulness: Poor sleep messes with your memory and makes it harder to remember things. - Brain Buildup: When you don’t get deep sleep, harmful stuff can build up in your brain, which is linked to diseases like Alzheimer’s. - Mood Swings: Lack of sleep makes anxiety and depression worse, and faster. - Faster Aging: Even one bad night can make your body age quicker at the cellular level. - Weight & Blood Sugar Problems: Bad sleep confuses your body, making it harder to manage weight and blood sugar. The science is clear Your body requires complete 90-minute sleep cycles. Here's why that matters for your health: - Sharper Brain: Each full cycle helps your brain process memories, boost focus, and clear out mental fog. - Deeper Recovery: You only hit the most healing stages of sleep (like deep and REM) when you complete the full cycle. - Balanced Hormones: Full sleep cycles help regulate key hormones like cortisol, insulin, and melatonin, keeping your mood, metabolism, and energy in check. - Stronger Immunity: Completing cycles gives your immune system the time it needs to repair, recharge, and fight off illness. This App Fixes What You're Doing Wrong We Do the Math for Perfect Sleep You Have Two Choices: 1. Continue bad sleep patterns and suffering the consequences 2. Let science optimize your sleep starting tonight The difference between these choices determines whether you'll be sharp and healthy at 50... or forgetful, overweight, and chronically exhausted. Download Now Before Another Night Damages Your Brain Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/view/sleep-calculator-wake-up/privacy-policy

About

Sleep Calculator

Optimize your sleep schedule by aligning with natural 90-minute sleep cycles. This app provides recommended times to fall asleep and wake up, helping you feel more rested and energized. It also offers calming sleep sounds and smart reminders to ensure you don't miss your ideal sleep windows.

Highlights
  • Smart sleep cycle calculations
  • Recommended wake-up times
  • Optimal sleep time suggestions
  • Calming sleep sounds
  • Smart reminders
Features
Read full description

Sleep Better Tonight Fall asleep peacefully, wake up refreshed, and plan your perfect sleep schedule with smart sleep cycle calculations and calming sleep sounds. helps you align your sleep with natural 90-minute sleep cycles so you can wake up feeling more rested and energized. Wake up feeling refreshed. Sleep Cycle Calculator helps you choose the best time to fall asleep or wake up based on your body's natural sleep cycles. Whether you're going to bed now or planning a wake-up time for tomorrow, this app helps you align your sleep with 90-minute sleep cycles to minimize grogginess. Features: 1.Tap "Sleep Now" to get recommended wake-up times 2.Choose a wake-up time to see when you should fall asleep 3.Set smart reminders to never miss the ideal sleep window Based on proven sleep science, this app is perfect for students, professionals, night owls, or anyone looking to improve sleep quality. Start sleeping smarter today. Legal Terms of Use: https://sleep.leaphealth.fitness/privacypolicy.html Privacy Policy:https://www.apirox.com/contact.php

Screenshots

Sleep Calculator4 screens
Sleep Calculator4 screens

Verdict

The call

The clearest difference is update cadence: Sleep Calculator at weekly against Sleep Calculator's every 6 weeks. 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. Sleep Calculator sells 1 one-off in-app purchase and Sleep Calculator sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Sleep Calculator ships an update weekly, Sleep Calculator every 6 weeks. The most recent releases landed on September 9, 2026 and September 13, 2026 respectively.

Scorecard1 real difference · 9 level
Sleep Calculator versus Sleep Calculator: the parameters behind the verdict, then further details
ParameterSleep CalculatorSleep Calculator
PriceFreeFree
Rating5.0 (1 ratings) — better
Positive reviews100.0% of reviews
Number of ratings1 — better
Update frequencyWeekly — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree
DevicesiPhone, iPad — betteriPhone
Requires iOS17.616.6 — better
Further details — not scored
Size13 MB127 MB
Age rating4+4+
DeveloperTharindu Prabath凤英 刘

In-app purchases

1 purchases

Sleep Calculator

One-time1
  • Sleep Calculator Premium$2.99
3 purchases

Sleep Calculator

One-time3
  • Weekly Member$3.99
  • Monthly Member$9.99
  • Yearly Member$29.99

Questions

Is Sleep Calculator free?
Sleep Calculator is free to download, with in-app purchases available.
Is Sleep Calculator free?
Sleep Calculator is free to download, with in-app purchases available.
Do Sleep Calculator or Sleep Calculator have ads?
Neither Sleep Calculator nor Sleep Calculator shows ads.
Which is updated more often, Sleep Calculator or Sleep Calculator?
Sleep Calculator ships an update weekly, and Sleep Calculator every 6 weeks. Most recently, Sleep Calculator was updated on September 9, 2026 and Sleep Calculator on September 13, 2026.

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