Measure Time in Bed Across Midnight Without Losing Minutes
Bed at 23:30 and up at 07:15 is 465 minutes in bed — if you count across midnight correctly. Log each night as minutes before and after midnight and see the shortest night, not just the average.
1 · night | bedtime minutes before midnight | wake minutes after midnight
FIRST-LOAD
Input is processed locally and a draft is saved automatically in this browser profile when storage is available. Reset to sample clears that draft; Pro history has its own clear button. A state link encodes your inputs in its URL: share only non-sensitive rows. Browser history, clipboard and anyone receiving the link may retain it. Optional AI use below leaves this device; it is not required.
Data note: Everything runs in this browser tab on the night window strip: your night | bedtime minutes before midnight | wake minutes after midnight stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Perspective: Before: 23:30 to 07:15 is not 7.15 minus 23.30 hours. After: the night window strip shows the working beside each named row so the reader can change the assumption and inspect the consequence.
2 · Read the night window strip
Arithmetic on times you enter. Time in bed is not sleep duration or quality, and this is not sleep medicine or a diagnosis; discuss persistent problems with a clinician.
Paid layer: night window strip print and history
one-time step · the free reading above stays complete
Free tier
- one complete night window strip run in the app
- three samples plus unlimited article-demo runs
- unwatermarked result text and an explicit, user-triggered state link
What $4 one-time adds
- print the night window strip with its row workings
- CSV of minutes in bed and row explanations
- last five reading summaries saved in this browser profile
$4 once for repeated filing of the night window strip, not for a better answer. Illustrative time basis: avoiding one five-minute manual reformat per saved reading; no market-price or guaranteed-savings claim.
Local history (this device)
- No saved runs yet — your first run files here.
Checkout is unavailable until a payment link is configured. The optional unlock is browser-local, profile-scoped and best-effort, not server-verified access. Clearing browser data can remove it; there is no account or cross-device recovery.
Boundary and sources
Arithmetic on times you enter. Time in bed is not sleep duration or quality, and this is not sleep medicine or a diagnosis; discuss persistent problems with a clinician.
- Method: If you sleep 0 minutes before midnight and wake 420 minutes after, the window is 420 — the edge sample. Wake offsets must stay below 1440 minutes; use the night you went to bed as the row label.
- All sample records are invented examples. The app does not fetch measurements, policies, files or personal records.
- Google’s official pricing page, fetched 2026-09-28, lists free-tier access including AI Studio. Optional formatting only; limits and availability can change. Free-tier content may be used to improve products. Never paste private records there.
Mechanism: competence-autonomy-loop
Optional AI formatting, not calculation
For this night window strip, use the free AI Studio interface only if available to you, with no paid API key. Manual entry completes the same workflow for free. Supply only fictional or non-sensitive notes. Review its output against the source; never paste unresolved questions into the numeric rows.
Format my non-sensitive notes for a night window strip. Return plain rows only: night | bedtime minutes before midnight | wake minutes after midnight. Preserve supplied quantities exactly. Do not guess missing values; list questions separately. Do not calculate or add advice. I will check every row before pasting into the local tool.
Accepted schema: night | bedtime minutes before midnight | wake minutes after midnight. No AI response is executed as code.