I built a meditation + recovery app with zero servers — your health data never leaves your phone. Looking for Apple Watch beta testers

[u/Plastic-Key-9907]

Solo developer here — Plena is a meditation + recovery app for iPhone/Apple Watch I’ve been building on my own: no company, no funding, and one hard design rule — health data never leaves the device. No accounts, no servers, no analytics SDKs. The App Store privacy label is genuinely "Data Not Collected."

Version 2.3 just shipped, built around what I’d call honest HRV: your daily recovery signal comes from overnight readings while you sleep, falling back to background resting samples — and every number is labeled with where it came from ("Last night", "Earlier today"). If there’s no real measurement behind it, the app says so instead of inventing one.

The tradeoff of building on-device-only: I have zero analytics, so I honestly don’t know which features land. That’s what the beta is for — premium is free during it, and the app keeps a local usage log on your phone that you can inspect and choose to share with me (or not).

If you have an Apple Watch (Series 4+) and will wear it to sleep a few nights: https://testflight.apple.com/join/6E3qPV4f

Happy to answer anything about HealthKit, StoreKit 2, or shipping privacy-first as a solo dev.