Sleep Log
Log bedtime, wake time and a quality rating each day.
Overview
The Sleep Log captures the three numbers that actually drive a useful sleep conversation, bedtime, wake time, and a quality rating. Each morning you record the previous night, and the log tracks duration, schedule consistency, and how your subjective rating tracks against the clock. After a couple of weeks you have a picture clearer than a smartwatch summary, because subjective rating is the only metric that consistently predicts how you actually feel during the day.
The log is built for the long, slightly boring middle of sleep improvement, the part where you are testing whether a habit, a supplement, a caffeine cut-off, or a new mattress is doing anything measurable. Bringing two months of data to a GP or sleep specialist is far more useful than answering "I think I sleep badly" from memory. For shift workers, new parents, and people with chronic insomnia, a written record is also a small relief, because it externalises the worry of remembering.
How it works
A morning entry asks for last night's bedtime, this morning's wake time, and a quality rating on a defined scale. Duration is computed automatically. The history view lists entries reverse-chronologically with averages over the past week and month, and surfaces the gap between bedtime variability and quality.
Entries live in your browser's local storage. There is no wearable integration and no automatic data import. The entry friction is the point: a small, daily act of paying attention.
Examples
- Logging an 11.30 p.m. bedtime, 7 a.m. wake, and a quality of 8 after a quiet, screen-free evening.
- Tracking a rough night with a 1 a.m. bedtime, 6 a.m. wake, quality 3, with a note about a late espresso.
- Recording an unusually long sleep at the weekend, quality 9, to see how it affects Monday's rating.
- Building a four-week record after starting a new wind-down routine, useful as an A/B comparison.
FAQ
What rating scale should I use?
A one-to-ten subjective rating is common. Stick with one scale so your history is comparable.
Does it track sleep stages or heart rate?
No. Those require a wearable. The log is intentionally simple and captures the three most useful numbers.
Can I back-fill missed nights?
Yes. Entries default to last night but can be set to any earlier date.
Is the data private?
All entries stay in your browser's local storage. Nothing is uploaded.
Should I bring this to a doctor?
Yes. A few weeks of dates, durations, and ratings is far more useful than memory and is the kind of record clinicians appreciate.