meiso is the world's simplest meditation timer that quantifies your practice with HRV (heart rate variability) analysis. • HRV-based meditation skill leveling (FFT, LF/HF) • External BLE heart-rate sensor support (Polar H10) • Real-time heart-rate waveform during sessions • Apple Watch app + Apple Health (Mindful Minutes) • Countdown / count-up timer with bell sound • 5 languages (EN / JA / ES / KO / ZH) • 100% free, no ads, no subscription, no account

AppSignal — Real-time monitoring that helps you ship with confidence

Real-time monitoring that helps you ship with confidence

Hi everyone! 👋 I'm Masayuki, a solo iOS developer from Japan. I built meiso because I wanted a meditation timer that goes beyond a simple stopwatch and actually shows whether my practice is working. How meiso quantifies meditation: • Apple Watch (or any Bluetooth heart-rate sensor like Polar H10) records your heart rate • A custom FFT pipeline computes HRV (LF/HF ratio) from R-R intervals • You get a "meditation skill level" — think of it as Strava for mindfulness Why it might help: • Beginners can finally see if they're "doing it right" • Long-time meditators can track progress over months • 100% free, no ads, no subscription, no sign-up — all data stays on-device / Apple Health Download on the App Store: https://apps.apple.com/app/id127... Feedback always welcome — what feature would help your practice most?

AppSignal — Real-time monitoring that helps you ship with confidence

Real-time monitoring that helps you ship with confidence

meiso — Meditation Timer with HRV

Visualize your meditation depth with HRV. Free, no ads.

Visualize your meditation depth with HRV. Free, no ads.