Whoop won't show it. Hummingbird does — straight from the strap, beat by beat, on your screen. Add humming and breathwork to see what moves the number.
A pitch target moves across the screen. You hum along. Your live HRV updates underneath the hum in 5-minute rolling rMSSD — the same math Whoop, Oura, Garmin, Elite HRV, and Kubios all use.
A custom YIN detector runs in pure Dart on your phone. Per-pixel color shows match quality against the target wave.
Pair a Bluetooth chest strap (Whoop, Polar, Garmin, others on the 0x180D HR profile). Beat-by-beat, directly from the strap.
All pitch detection, all HR/HRV math, all session storage on your phone. No server. No account. Nothing uploaded.
Continuous match scoring with a locked-on pulse and an expanding teal breath cue. A summary chart shows accuracy per cycle.
After 10 sessions an on-device grid search retunes the RESONATE pattern from your own response — cycle duration, hum/pause ratio, pitch start, pitch drop.
Grouped Today / Yesterday / This week. HR sparklines, per-cycle accuracy, lifetime stats, and an Impact view that tracks HRV across weeks.
Each pattern card opens a design rationale with references to the published research that informed its parameters — pitch contour, range, cycle timing, session length.
A guided arc for people who already know how to breathe slowly and want to see the floor of their nervous system. Seven sessions, progressively quieter, ending in a fully silent practice with the strap doing the talking.
Hum volume tapers across the program. By day seven there's no vocalization — just paced breath and your live HRV trace.
The screen goes dark between cues. The breath ring is the only thing moving. Eyes open or closed; the pacing holds either way.
An additional Impact panel shows your minimum HR and peak HRV per session — the deepest point you reached, not just the average.
Five seconds of comfortable hum, two seconds of silence. Noisy-environment detection runs in the background.
UNWIND, DRIFT, ANCHOR, RESONATE, STILLNESS, or free-form EXPLORE. Tap the (i) for design notes and references.
The target scrolls. Your live pitch trace overlays it. A breath cue ring expands and contracts with the cycle.
Match %, per-cycle accuracy, an HR sparkline, and HR/HRV deltas against your pre-session baseline.
No audio is recorded. No pitch sample, heart-rate beat, or session record leaves the device. There's no account to sign up for. The microphone and Bluetooth permissions are runtime-only.
7-day free trial up front. After the trial, the daily-launch free tier shows live HRV once a day until you upgrade.
For bug reports, billing, or anything that needs a private reply, email spicy.ginger.labs@gmail.com.
Trade notes with other users, share session screenshots, and follow what's coming next on our Discord.