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.
Official product identity
This website refers only to SleepLedger: Sleep Diary, published byBorealbit Technology Limited. Its Apple App Store ID is 6757725138 and its iOS bundle identifier is com.borealbit.sleepledger. Other apps with similar names are separate products and are not affiliated with SleepLedger or Borealbit Technology Limited.
Verify the official listing on the Apple App Store.
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 diaryand 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If a product detail or source is outdated, use our support page to report it.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.