The SleepKit blog
Practical guides to sleep cycles, sleep debt, and consistency, with enough context to understand the numbers behind a good or rough night.
Why sleep consistency matters
A steady bedtime and wake time can matter alongside total sleep duration. Learn how consistency affects sleep and how to measure it.
Why SleepKit Doesn't Show You a Sleep Score
Most sleep apps lead with a single number out of 100. SleepKit keeps duration, consistency, and quality separate instead.
How to Manage Jet Lag
Jet lag is usually harder flying east than west. Learn how adjustment works and how to plan for it.
Sleep Cycles Explained
Sleep moves through roughly 90-minute cycles of light, deep, and REM sleep. Learn what happens in each stage and why wake-up timing matters.
What Is Sleep Efficiency?
Sleep efficiency measures how much of your time in bed you spend asleep. Learn the formula, common ranges, and practical ways to improve it.
How to Calculate and Recover From Sleep Debt
Sleep debt adds up night by night. Learn how to calculate it, what a larger debt can mean, and why one weekend sleep-in may not clear it.
How Many Hours of Sleep Do You Need?
An age-based guide to recommended sleep duration, the reference ranges sleep foundations use, and why one number cannot tell the whole story.
See last night clearly
SleepKit reads Apple Health and shows separate duration, consistency, and quality rings. Your sleep logs automatically.
iPhone · Apple Health · No account required