AppMarketSpy › Health & Fitness › Nodly: Sleep Debt & Caffeine
Nodly: Sleep Debt & Caffeine
Circadian Rhythm & HRV Tracker
Eiji Shibayama · Health & Fitness
—average rating
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+0new ratings, last 7 days
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App info
- Developer
- Eiji Shibayama
- Category
- Health & Fitness, Lifestyle
- Released
- Oct 5, 2026
- Version
- 1.0.0 (Oct 5, 2026)
- Price
- Free
- Size
- 7.6 MB
- Requires
- iOS 17.0
- Age rating
- 13+
- Languages
- English and Japanese
In-app purchases
| 買い切り（Lifetime） | $59.99 |
| 年額プラン | $22.99 |
| 月額プラン | $2.99 |
Current prices, App Store US.
🔒 Price history2 snapshots: when prices changed and new plans appearedGet Pro access
About Nodly: Sleep Debt & Caffeine
Sleep debt does not disappear in a single night. Nodly visualizes accumulated sleep debt, estimates daily cognitive readiness, tracks active caffeine clearance, and guides evening bedtime relaxation—all in one place. Powered exclusively by on-device processing from Apple Health data, Nodly helps you understand how much energy you have today, when to stop drinking coffee, and when to start winding down for sleep. [Key Features] 1. Sleep Debt & Daily Readiness - Estimates sleep debt in hours using a 14-day exponential decay weighted model. - Combines sleep duration, Heart Rate Variability (HRV), and resting heart rate against your 7-day baseline to display a 0–100 Readiness score. - Clearly flags "Preliminary" or "Not Measured" when data is insufficient. 2. Caffeine Clearance & Cutoff - 1-tap logging for coffee, tea, espresso, and energy drinks. - Calculates active blood caffeine (mg)…
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