Hummingbird Biofeedback

Hummingbird Biofeedback

Live HRV — Whoop, Polar, more

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Released
May 8, 2026
Updated
October 26, 2026

Features

Hummingbird Biofeedback screenshot #1 for iPhone
Hummingbird Biofeedback screenshot #2 for iPhone
Hummingbird Biofeedback screenshot #3 for iPhone
Hummingbird Biofeedback screenshot #4 for iPhone
Hummingbird Biofeedback screenshot #5 for iPhone
Hummingbird Biofeedback screenshot #6 for iPhone
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About

Hummingbird Biofeedback reads the Bluetooth signal your heart-rate strap (Whoop, Polar H10, Garmin HRM, …) is already broadcasting and shows live HRV, beat by beat, on your screen. No server. No account. The strap you already own, finally fully visible — alongside real-time biofeedback for humming, meditation, breathwork, or simply sitting still. Pick a humming pattern and a pitch target moves across the screen, you hum along, and three live readouts update underneath — a real-time picture of what your nervous system is doing, not just one number. — WHAT YOU WATCH, LIVE — HRV 5-minute rolling rMSSD — the same metric used across the HRV ecosystem. Different moment of the day than your nightly score, same math. RSA Vagal depth. Every breath stretches and releases your heart rate; RSA measures how big that swing is, in milliseconds. It's the amplitude of your breath's pull on your heart — and slow, deep humming widens it. Watch it widen, breath by breath. COHERENCE Rhythm, on a 0–100 scale. How clean and orderly that wave is. When your breath and heartbeat settle into one smooth oscillation, coherence climbs toward the resonance "zone" — the difference between a flute holding one clear note and a radio stuck between stations. Why three and not one? HRV alone is jumpy, and during slow breathing it can even dip — even as the rhythm underneath gets deeper (RSA) and cleaner (coherence). The extra two metrics catch what a single number misses, so you can watch a session take shape in real time instead of guessing. What does five minutes of slow humming do to these numbers right now? What about fifteen minutes of meditation? Hummingbird is the simplest answer. — FIVE HUMMING PATTERNS — UNWIND Slow descending hum, the most-studied pattern. DRIFT Long, narrowly-descending hum with a lullaby-shaped contour. ANCHOR A held, steady pitch at a slow cadence. RESONATE Pitch and pace near the cardiovascular resonance band (~6 BPM). EXPLORE Free-form humming — no target, no prescribed cadence. — PLUS STILLNESS — Silent, mic-free biofeedback for any quiet practice — meditation, yoga nidra, body scan, pre-sleep wind-down, post-stress reset. No pitch target, no prescribed cadence. A passive expanding ring paces ~5.5 breaths/minute if you want an anchor; ignore it and the session still captures HRV, RSA, and coherence either way. Pick a 5, 10, 15, 20, or 30-minute timer (or Open) and tag the session with what you actually did, so a 6-ms rMSSD rise after "Pre-sleep" and a 6-ms rise after "Cold plunge" stay sortable in your history. Tap the (i) on any card for the design rationale and references to the published research that informed each parameter (pitch contour, range, cycle timing, session length).
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What's New in Hummingbird Biofeedback

1.2.2

October 26, 2026

MADE FOR IPHONE DUO Open your iPhone Duo and Hummingbird now uses the whole screen as two pages, and keeps everything you tap out of the fold. • In a humming session, the pitch chart stretches across both pages and shows about 18 seconds at once, so the next breath and the next phrase are already in view. Your controls sit on the left page and your live body trends on the right. • Home, Heart, History, the session summary, Stillness, the resting baseline and the recovery hold all lay out across two pages. • Settings, Pro and strap pairing open on the right page, with the screen you came from still in view on the left. • Half-fold your Duo on a table during a session: what you watch sits on the top half, what you tap on the bottom. • iPad in landscape gets the same two-page layouts. FAIRER MATCH SCORES You now get full credit whenever your hum is close to the target note: anywhere inside the darker stripe in the middle of the green band. Before, only a hum dead on the note counted in full, so the natural wobble of a steady hum quietly cost you points. Credit still tapers off toward the edge of the band. What this means for you: the same humming now scores higher than it used to. Your 10-session average will climb over your next few sessions as older scores roll out of it. That's the new scoring, not a change in you. A CLEARER LOOK AT YOUR NUMBERS • The live pitch chart is redrawn. Real musical notes run up the side, a green band marks the target, and your hum line turns green when you're in it. Drift off, and the chart shows how far and whether to hum higher or lower. Breaths are marked "Inhale", and the next phrase is labelled before it starts. • MATCH now shows what it's made of: how close your pitch was, times how much of the time you hummed. New "match by breath" bars fill in as you go. • Each body reading (heart rate, HRV, stress, RSA and coherence) now sits right beside its own trend line. Drag across any trend to see every reading at that moment. • Home, the resting baseline, the recovery hold and the Stillness pace check share the same look, so your numbers read the same before, during and after a session. • Stress has its own neutral colour, with a Calm, Balanced, Elevated or High tag, so it's never mistaken for Coherence. • Every 10-second reading now appears at the moment it was measured, not a few seconds early. • On the free plan, Home shows your heart rate and one simple line naming the Pro metrics, instead of a block of blurred numbers. ALSO IN THIS UPDATE • If a call, Siri or an alarm interrupts a session, it now pauses and picks up cleanly when you resume, instead of carrying on without hearing you. • In the background, Hummingbird lets go of your heart-rate strap so your watch or bike computer can use it. • Sessions save reliably when you finish, and if a save ever fails you'll see a Retry. • Restoring a backup is safer: if anything goes wrong, your previous data is put back.

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Subscriptions & In-App Purchases

$29.99

Hummingbird Biofeedback

Live HRV from your Whoop or Bluetooth heart rate strap

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