Sleep Calculator Support

We're here to help you get the most out of Sleep Calculator

App Information

App Name: Sleep Calculator Version: 1.0 Platform: iOS 15.6 or later Developer: Sleep Calculator Team Last Updated: January 2026

Frequently Asked Questions

How does Sleep Calculator work?

Sleep Calculator uses the concept of 90-minute sleep cycles to suggest optimal bedtimes and wake-up times. The idea is that sleeping in complete cycles (about 90 minutes each) may help you wake up feeling more refreshed than waking up in the middle of a cycle.

Simply enter when you want to wake up, and we'll suggest 5 different bedtimes based on 5-6 complete sleep cycles. Or enter when you plan to go to bed, and we'll suggest optimal wake-up times.

Is Sleep Calculator free?

Yes! Sleep Calculator is completely free to use. There are no subscriptions, no in-app purchases, and no advertisements.

Does the app track my sleep?

No, Sleep Calculator does not track or monitor your sleep. It is a simple calculation tool that helps you plan sleep schedules. All calculations happen instantly on your device - no data is stored or transmitted.

Do I need to create an account?

No account is required. You can use all features of Sleep Calculator immediately without any registration or login.

Does the app work offline?

Yes! All calculations are performed locally on your device. No internet connection is needed to use the app.

What is a sleep cycle?

A sleep cycle is a period of sleep that typically lasts about 90 minutes and includes different stages: light sleep, deep sleep, and REM (Rapid Eye Movement) sleep. Completing full cycles before waking up may help you feel more refreshed.

Most adults need 4-6 complete sleep cycles per night, which equals about 6-9 hours of sleep.

Why are there multiple suggested times?

We provide multiple options because everyone's sleep needs are different:

5 cycles (7.5 hours) - Good for people who need less sleep
6 cycles (9 hours) - Ideal for most adults
4 cycles (6 hours) - Minimum for some people

The "Best" label indicates times that align with commonly recommended sleep durations.

Is this medical advice?

No. Sleep Calculator provides general sleep timing suggestions based on commonly discussed sleep cycle concepts. It is not medical advice, diagnosis, or treatment. Individual sleep needs vary greatly. If you have persistent sleep problems, please consult a healthcare professional.

How to Use the App

Calculate Bedtime

Tap the "Bedtime" mode at the top
Select the time you need to wake up using the time picker
Tap "Calculate"
View the suggested bedtimes, each showing the number of sleep cycles
Times marked "Best" align with recommended sleep durations

Calculate Wake-up Time

Tap the "Wake Time" mode at the top
Select the time you plan to go to bed
Tap "Calculate"
View the suggested wake-up times based on complete sleep cycles

Switch Themes

Tap the theme button (sun/moon icon) in the top right to switch between light and dark modes.

Tip: It typically takes about 15 minutes to fall asleep after getting in bed. Our calculations account for this "fall asleep time" to give you more accurate recommendations.

Troubleshooting

App won't open or crashes

Ensure your device is running iOS 15.6 or later
Try restarting the app: double-tap home button (or swipe up) and swipe away the app, then reopen
Restart your device
Check for iOS updates in Settings > General > Software Update

Calculations seem incorrect

Remember that sleep cycles are approximately 90 minutes - individual variation is normal
The app accounts for about 15 minutes of "fall asleep time"
Results are suggestions based on general sleep cycle concepts, not personalized medical recommendations

Dark mode not working

Tap the theme toggle button in the top right of the app
Ensure your device's display settings allow app-specific theme settings

Feature Requests and Feedback

We'd love to hear your suggestions for improving Sleep Calculator! While we aim to keep the app simple and focused, we welcome feedback on:

New features you'd find helpful
User experience improvements
Bug reports
Translation requests

Contact Us

Have a question not answered here? Need to report a bug? We're here to help!

Email Support

For general inquiries and support:

Email: iocompile67692@gmail.com

GitHub Issues

For bug reports and feature requests, please use our GitHub repository:

Submit an Issue on GitHub

Open GitHub Issues

Response Time

We typically respond to inquiries within 24-48 hours during business days.

Privacy

Your privacy is important to us. Sleep Calculator does not collect any personal data. For complete privacy information, please review our Privacy Policy.

App Store

If you find Sleep Calculator helpful, please consider leaving a review on the App Store. Your feedback helps others discover the app and motivates us to keep improving it.

Thank you for using Sleep Calculator!
Sleep better, wake refreshed.