---
title: Read Your Sleep Journal as a Strip Chart — Free
description: Seven nights of a diary, drawn the way a chart recorder would: time in bed per night, how far your bedtime drifts, and what your notes actually line up with.
category: health
last_verified: 2026-09-12
freshness: green
published: 2026-09-12
canonical_url: https://gratis-ai.pages.dev/articles/sleep-journal-hypnogram-reader.html
companion_app_url: https://gratis-ai.pages.dev/apps/sleep-journal-hypnogram-reader.html
reading_time_minutes: 4
tags: health, sleep, journal, charts, no-account, local
---

# Read Your Sleep Journal as a Strip Chart — Free

Seven nights of a diary, drawn the way a chart recorder would: time in bed per night, how far your bedtime drifts, and what your notes actually line up with.

**Free and complete.** This guide is a standalone free tool — no account, no card, anywhere. The only paid option is one optional extra outcome: $5 one-time. Nothing in the free tier is gated.

## Who it's for

Anyone keeping a sleep diary — including for CBT-I — who cannot see a pattern in seven lines of times

## What's free

- Plot time in bed per night from a pasted journal, locally, with nothing uploaded
- Compute bedtime and wake-time spread as circular standard deviations
- Tally the notes you wrote against the nights you wrote them

## Optional paid add-on

**$5 one-time.**

- Rolling 90-night chart — estimate: ~30 min saved versus stitching seven-day views together to see a trend
- Note-to-outcome table across the whole period — estimate: ~20 min saved of re-reading your own journal
- Clinic handout — estimate: ~25 min saved of explaining from memory at an appointment

## Sources & verification

- Tool: Local time arithmetic and circular statistics (no model needed)
- Primary source: the free tool itself (local-first, no external dependency)
- Last verification: 2026-09-12 (green)

## Use it

- Interactive guide: https://gratis-ai.pages.dev/articles/sleep-journal-hypnogram-reader.html
- Companion app: https://gratis-ai.pages.dev/apps/sleep-journal-hypnogram-reader.html
- This machine-readable mirror: /mirrors/sleep-journal-hypnogram-reader.md

*Generated free at https://gratis-ai.pages.dev/articles/sleep-journal-hypnogram-reader.html — every guide on GratisAI is a complete, working tool. $0, no account, no card, anywhere.*