About & editorial standards
A calm sleep journal, with clear boundaries.
SleepLedger is published by Borealbit Technology Limited. The app records your own perception of sleep; it does not diagnose, treat, or replace care from a qualified professional.
Who writes this site
Product pages, guides, and articles are written and maintained by the SleepLedger editorial team at Borealbit Technology Limited. We use a company byline because no individual clinician authored or medically reviewed the current content.
How we review content
- Product claims are checked against the current app experience and App Store offering.
- Health-adjacent claims are scoped to self-tracking and linked to primary or authoritative sources.
- We separate subjective records and consumer-device estimates from clinical evaluation.
- Material edits receive a visible updated date; dates are not refreshed automatically.
Site content was last reviewed on .
Evidence and safety boundary
Sleep diaries can help people record sleep and daytime context for later review. They are supporting records, not proof of a diagnosis. If sleep problems are persistent, severe, worsening, or affecting daytime safety, contact a qualified healthcare professional.
Start with the NHLBI sleep diary and the AASM position on consumer sleep technology for the external evidence used across this site.
Corrections and questions
If a product detail or source is outdated, use our support page to report it. We will review substantive corrections and update the page date when the content changes.