Tools · Daily
Sleep journal
Last night in three fields; the truth over a fortnight underneath — average duration, typical bedtime, how steady your schedule really is, and how often you hit your target. After-midnight bedtimes are handled correctly, and your nights stay in your browser unless you choose to sync.
Questions people actually ask
- How much sleep should I be getting?
- The American Academy of Sleep Medicine and Sleep Research Society consensus recommendation for adults is seven or more hours per night on a regular basis — the figure the CDC’s sleep guidance uses. The journal’s target defaults to 8 hours and is editable, because seven is the floor of the recommendation, not a prescription; needs vary by person and age.
- What does the consistency number mean?
- It is the spread of your bedtimes (a standard deviation, in minutes) over the last fortnight. Sleep research consistently finds regularity matters alongside duration — a schedule that swings hours night to night fights your circadian rhythm even when the total hours look fine. Smaller is steadier; under ±30 minutes is a genuinely consistent schedule.
- How does it handle bedtimes after midnight?
- Correctly, and automatically: each night is anchored to its wake-up morning, and 00:30 to 06:15 logs as 5h 45m without any special handling from you. Even the "typical bedtime" statistic does the right thing — averaging 23:00 and 01:00 gives midnight, not the noon a naive average would produce.
- Is this a medical tool?
- No. It is a journal — a record of when you slept, with honest arithmetic on top. It does not measure sleep quality, detect sleep disorders, or replace clinical assessment. If you regularly sleep enough hours and still wake exhausted, or snore heavily, or fight to fall asleep for weeks, that pattern belongs in front of a clinician, and a filled-in journal like this is genuinely useful to bring along.