Observed arrival · 2026-11-11
Slowtide turns Apple Watch readings into an energy budget
A planned iPhone and Apple Watch app compares overnight health data with a user’s recent baseline, then tracks activity and symptoms.
- For
- People pacing activity with POTS, dysautonomia, ME/CFS, or long COVID
- Worth noticing
- It compares readings with a personal 14–28-day baseline and says it avoids population norms and red-number judgments.
Field notes
The proposed morning view compares overnight HRV, resting heart rate, and sleep with the user's own previous 14–28 days; the site says it avoids population norms and red-number judgments. During the day, activity above a personal heart-rate zone would be tracked on the watch face or lock screen, with a tap alert, while symptom presets include POTS and delayed post-exertional malaise (PEM). The page also describes a weekly pattern view and PDF export for clinician conversations; these are product plans, not verified live features.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue