Direct-Read HRV Pacing App For ME/CFS And Long COVID Users Who Already Own A Garmin Or Apple Watch But Refuse Visible's Recurring Subscription
Visible has become the default pacing app for ME/CFS, Long COVID, fibro, and POTS, but it requires either their proprietary armband (an extra device) or a $14.99/mo subscription to access advanced features with the user's own Garmin or Apple Watch. Patient forums and ME-focused research communities surface the same wish repeatedly: a one-time-purchase pacing app that reads HRV and overnight recovery directly from existing Garmin Fenix, Venu, or Apple Watch hardware, computes a daily energy envelope, and warns the user before they push into post-exertional malaise (PEM).
The trap is trying to be a 'better Visible.' Don't... be the angry-Garmin-owner alternative. Patient framing matters. Use language like 'energy envelope' and 'PEM warning' and explicitly say 'no subscription, ever' on the App Store screenshot. The ME community is small enough that word of mouth from one well-reviewed launch will saturate it.
landscape (3 existing solutions)
Visible owns the category UX-wise but is now hated by a meaningful subset of the patient community for paywalling features that should be table stakes. A direct-read pacing app for existing Garmin/Apple Watch owners, priced as a one-time $39 unlock, has a real opening.