Capi: Sleep Factors Analysis1.9 - App Store

Capi helps you discover how your daily habits and health events relate to your sleep. Track the factors you want to test, import sleep data from Apple Health, and review clear statistical insights built from your own history.

Log the details that matter to you
- Track routines, workouts, caffeine, alcohol, supplements, screen time, stress, travel, naps, and other daily factors.
- Create custom event types as yes/no, numeric, or low/medium/high entries.
- Edit past logs and archive factors you no longer want to track while keeping historical data intact.

Use your Apple Health sleep data
- Import sleep, activity, workout, mindful minutes, and medication records with your permission.
- Choose a preferred sleep source when multiple devices or apps write sleep data.
- Review nightly sleep summaries including total sleep, awake time, REM sleep, deep sleep, and a single-night Sleep Quality Score.

Find patterns with statistics
- See which factors are associated with changes in total sleep, deep sleep, REM sleep, awake time, or sleep quality.
- Compare impact estimates, confidence levels, sample size, and charts for each result.
- Learn how to interpret correlation, reliability, and limitations directly inside each insight.

Private by design
Capi runs on your device and is built for personal experimentation. Your logged events and Health data are processed locally, and Health data is not sent to a server for analysis. The optional iCloud backup stores only the events you log yourself in your personal iCloud - never your Health data.

Unlimited Access unlocks unlimited custom event types, custom analysis date ranges, and data export for deeper personal review. It also includes iCloud backup, so your logged events survive reinstalling the app or moving to a new device.

Capi is for wellness and self-experimentation only. It is not a medical device and does not provide medical advice, diagnosis, or treatment.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Version History What's new:
• Swiping between Journal dates no longer accidentally changes manual event logs. 1.9 Aug 15 What's new:
• Fixed an issue where sleep imported through Apple Health could be counted multiple times when some fitness apps replaced records during sync. Previously affected nights are repaired automatically after updating.
• The Journal now makes it clearer that each day’s factors are compared with the sleep that follows them.
• Switching between Journal dates is now smoother and more responsive. 1.8 Aug 9 What's new:
• Fixed an issue where sleep vitals (wrist temperature, respiratory rate, resting heart rate) could be missing for the latest night when Apple Watch delivered them late. Previously affected nights fill in automatically after updating. 1.7 Jul 15 Capi: Sleep Factors Analysis — See which daily habits and factors are actually associated with better or worse sleep.

What's new:
• iCloud Backup — back up the events you log to your personal iCloud, so your data survives reinstalling the app or moving to a new device. Turn on automatic backup and it stays up to date on its own. Data imported from Apple Health never leaves your device. 1.6 Jul 14 Capi: Sleep Factors Analysis — See which daily habits and factors are actually associated with better or worse sleep.

What's new:
• Sleep vitals from Apple Health — import sleeping wrist temperature, respiratory rate, and resting heart rate, shown on the nightly sleep card and analyzed against your habits.
• Two new derived metrics — sleep efficiency and awakenings join your sleep metrics in Insights.
• Smarter insight colors — results are now colored by whether a change is good for your sleep (for example, a lower resting heart rate counts as positive).
• Switching days in the Journal is now smoother — content slides in the direction you swipe and the new day appears instantly.
• Redesigned Reliability section in insight details — a plain-language verdict with clear correlation, significance, and nights rows, plus explanations of every number.
• Consistent confidence ratings — every tier is now based on significance adjusted for how many factors you track, so an insight's label always matches its statistics. 1.5 Jul 12 Capi: Sleep Factors Analysis — See which daily habits and factors are actually associated with better or worse sleep.

What's new:
• A welcome screen explaining how Capi uses Apple Health — your health data stays on your device.
• Flip between days in the Journal with new previous/next buttons or a quick swipe.
• An improved iPad layout — content is now comfortably centered instead of stretched edge to edge.
• Stability improvements. 1.4 Jul 9 Minor UI update 1.3 Jun 28 Minor UI update 1.2 Jun 23 Minor UI update 1.1 Jun 16 1.0 Jun 15