Comparison

Sleep Cycle Bedtime Calculator vs Refresh

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

Head to head
About

Sleep Cycle Bedtime Calculator

This app helps you determine optimal wake-up and bedtime based on sleep cycles. It calculates ideal times to go to sleep and wake up to feel more refreshed, considering the average 90-minute sleep cycle duration. You can also customize your estimated time to fall asleep.

Highlights
  • Calculate optimal wake-up times
  • Calculate optimal bedtime
  • Based on 90-minute sleep cycles
  • Supports 5-6 sleep cycles
  • Customizable fall asleep time
  • Apple Watch support
Features
Read full description

Plan your bedtime, calculate wake-up options, and explore your sleep history with Sleep Calc for iPhone and Apple Watch. No account or sign-up required. Find a time that fits Enter your wake-up time to see bedtime options, or enter your bedtime to see wake-up options. Adjust the time you need to fall asleep and the range of sleep cycles shown. Calculate on Apple Watch Check bedtime and wake-up options from your wrist. Your calculator settings sync between your iPhone and paired Apple Watch. Review your sleep history Connect Apple Health to view sleep records from your Apple Watch or other compatible apps. Explore your sleep duration, bedtime consistency, interruptions and Sleep Scores with summaries and charts. The most recent 14 days are available for free. Full available sleep history requires Sleep Calc Pro. Set bedtime and wake-up alarms Create alarms from your calculated times, edit their times and labels, choose repeat days and select an alarm sound. Requires Sleep Calc Pro and an iPhone or iPad running iOS 26 or iPadOS 26 or later. Purchases and subscriptions Additional paid features are available through one-time purchases and auto-renewable subscriptions. Available options, included features, and prices are shown in the app before purchase. Subscriptions renew automatically unless canceled. You can manage or cancel them in your App Store account settings. About the estimates The calculator uses fixed 90-minute cycle estimates; actual sleep cycles vary. It does not measure or predict your sleep stages. Sleep Scores summarize the sleep data available in Apple Health and are not a medical assessment. Privacy Policy: https://sleepcycles.carrd.co/#privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Refresh

Features
Read full description

Refresh 手环控制APP,检测身体状况

Screenshots

Sleep Cycle Bedtime Calculator3 screens
Refresh3 screens

Verdict

The call

The clearest difference is in-app purchases: Refresh at none against Sleep Cycle Bedtime Calculator's 4. Refresh also leads on update cadence (every 10 days vs every 3 months) and iOS requirement (11.0 vs 18.0). On price, 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. Sleep Cycle Bedtime Calculator sells 3 in-app purchases, starting at $4.99 per year. Refresh asks for nothing beyond the download.

UpkeepUpdate frequency

Sleep Cycle Bedtime Calculator ships an update every 3 months, Refresh every 10 days. The most recent releases landed on October 21, 2026 and October 13, 2026 respectively.

Scorecard3 real differences · 7 level
Sleep Cycle Bedtime Calculator versus Refresh: the parameters behind the verdict, then further details
ParameterSleep Cycle Bedtime CalculatorRefresh
PriceFreeFree
Rating4.1 (302 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings302 — better—
Update frequencyEvery 3 monthsEvery 10 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.011.0 — better
Further details — not scored
Size35 MB49 MB
Age rating4+17+
DeveloperKai OelfkeRefresh Technology Co., Ltd.

Bugs and requests

Sleep Cycle Bedtime Calculator

Reported bugs

5 issues
  • Touch screen unresponsive
  • App settings reset upon closing
  • Alarm goes off at unintended times
  • Skips certain time slots in calculations
  • Confusing icon similarity with Apple Watch app

Requested features

9 requests
  • Add graphs and visual data representations
  • Integrate with Apple Health or Fitbit data
  • Display number of sleep cycles achieved
  • Built-in alarm functionality
  • Persist settings when closing app
Show 4 more
  • Multi-language support
  • Detailed sleep analysis and personalized insights
  • Larger, more detailed charts for phone display
  • Calculate wake time from current time

Refresh

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Sleep Cycle Bedtime Calculator

Subscriptions2
  • SleepCalc Pro Yearly3 Days trial$4.991 Year
  • SleepCalc Pro Yearly$4.991 Year
One-time1
  • SleepCalc Pro2 variants$9.99
None

Refresh

No in-app purchases

Questions

Is Sleep Cycle Bedtime Calculator free?
Sleep Cycle Bedtime Calculator is free to download, with in-app purchases available.
Is Refresh free?
Refresh is free to download, with no in-app purchases.
Do Sleep Cycle Bedtime Calculator or Refresh have ads?
Neither Sleep Cycle Bedtime Calculator nor Refresh shows ads.
Which is updated more often, Sleep Cycle Bedtime Calculator or Refresh?
Sleep Cycle Bedtime Calculator ships an update every 3 months, and Refresh every 10 days. Most recently, Sleep Cycle Bedtime Calculator was updated on October 21, 2026 and Refresh on October 13, 2026.

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