Sheepful - The Perfect Sleep Cycle Calculator

Our Promise to the Flock

We value your privacy and promise not to be woolly about how we handle your data. This policy outlines how Sheepful collects, uses, and protects your information.

Information We Collect

Sheepful is a simple tool. We do not require you to create an account or provide personal details like your name or email. The only data we process is the time information you enter into the sleep calculator, which is handled locally in your browser and never stored on our servers.

Use of Cookies and Analytics

We use Google Analytics to understand how people use Sheepful and improve our service. Google Analytics may use cookies to collect anonymized traffic data, such as pages visited or time spent on the site. You can opt out of Google Analytics tracking by installing the Google Analytics Opt-out Browser Add-on.

Affiliate Disclosure

Some links on Sheepful are affiliate links. If you click a link and make a purchase, we may receive a small commission — at no extra cost to you. These partnerships help us keep Sheepful free and ad-light. We only recommend tools and products that align with our values and mission to support better sleep.

Data Security

Since we do not store your personal information, the risk of a data breach is minimal. We take reasonable steps to ensure the safety and privacy of your browsing experience.

Changes to This Policy

We may update this privacy policy from time to time. We encourage you to review it periodically. Your continued use of our service after any updates signifies your acceptance of the revised terms.

Sheepful calculates your ideal sleep times by mapping your natural 90-minute sleep cycles. By waking up at the end of a cycle, you avoid grogginess and start your day feeling more energized and refreshed.

To find your ideal bedtime, our calculator works backwards from your desired wake-up time. It subtracts full 90-minute sleep cycles and adds an average of 15 minutes for falling asleep. This ensures you wake up during a light sleep phase.

Feeling groggy after a long sleep is often due to "sleep inertia," which happens when you wake up during a deep or REM sleep phase. Our sleep calculator helps you avoid this by aligning your alarm with your body's natural light sleep stages.

Most adults need 7-9 hours of sleep for optimal health. However, quality is just as important as quantity. Using a sleep cycle calculator helps improve the quality of your rest, making every hour more restorative.

Our calculations are based on averages that work for most people. While factors like age, stress, and caffeine can affect your personal sleep cycle length, timing your sleep in 90-minute blocks is a proven way to improve morning alertness.

While it's not a cure for chronic insomnia, a bedtime calculator can significantly help by establishing a consistent sleep routine. This regularity helps regulate your internal clock, making it easier to fall asleep. For persistent sleep issues, please consult a healthcare professional.

Yes, consistency is the key to better sleep. Using the sleep calculator daily helps reinforce your natural circadian rhythm. Try to maintain a similar wake-up time, even on weekends, for optimal sleep health.

Short "power naps" of 10-20 minutes can boost alertness without harming your nighttime sleep. However, long naps (over 30 minutes) or napping late in the day can make it harder to fall asleep at your regular bedtime.

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