Sleep Tools
Sleep Journal
Log your bedtime, wake time, and how you slept to start noticing your own patterns. No account. No cloud. Your entries stay on this device.
Log tonight's sleep
Stored on this device onlyHow was your sleep?
Entries save only in this browser, on this device. We never receive or store this data — clearing your browser data will erase it too.
Your history
No entries yet — log tonight's sleep above to start.
Why a written record helps
Sleep quality is easy to misjudge from memory alone — a rough week can make every night blur together, and a good stretch can make it hard to remember what changed. A short daily record turns vague impressions into something you can actually look back on and compare.
Sleep pattern tracking is the practice of recording bedtime, wake time, and how rested you feel over days or weeks to spot what is actually helping or hurting your sleep. It works best when entries are quick and honest rather than detailed — a minute a day is enough.
If you are not sure what time to log as your bedtime, the bedtime calculator can help you find a target based on 90-minute sleep cycles.
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Frequently Asked Questions
Is my sleep journal private?
Yes. Every entry is saved only in your browser's local storage, on your own device. We never receive, see, or store this data ourselves — there is no account and nothing is sent to a server. Clearing your browser data will also clear your journal.
Can I see my journal on another device or browser?
No — because entries are stored locally rather than in an account, they stay on the device and browser you used to enter them. If you switch phones or clear your browsing data, that history will not carry over.
Why keep a sleep journal at all?
A short written record makes it much easier to notice patterns you would otherwise miss — like a habit of poor sleep after late caffeine, or better nights after a consistent bedtime. Most people start to see patterns within a week or two of regular entries.
What if I forget to log a night?
Just pick back up whenever you remember. A journal with gaps is still useful — you are looking for patterns over weeks, not a perfect unbroken streak.
What should I write in the notes field?
Anything that might explain how the night went — caffeine timing, stress, room temperature, alcohol, screen use before bed. Short is fine; the goal is just enough detail to jog your memory later.