Zone 3 · Aerobic
Watch anything.
See your heart.
Pulse puts your live heart rate in a Picture-in-Picture window that floats over any app — a HIIT video, a running map, a timer. It's floating over this page right now.
iPhone + Apple Watch or any Bluetooth strap.
07:42
A HIIT video.
Your pulse stays on screen.
The floating window
iOS has no floating widgets. Pulse found the one that exists.
Picture-in-Picture is the only window iOS lets an app float over everything — so Pulse renders your heart into it. Move it, resize it, put it over fullscreen video. It keeps ticking while you train.
Over any app
YouTube, Peloton, maps, timers — if it's on screen, Pulse floats above it.
Keeps updating
The window stays live even when Pulse itself is in the background.
Second channel
Prefer glancing up? Your BPM also lives in the Dynamic Island and on the Lock Screen.
Zones
You don't read a number mid-burpee.
You see a color.
Five training zones tint the floating window — grey means recover, amber means hold, red means back off. The gauge below is live: it's the same heartbeat the card in the corner is showing.
Zones from %HRmax or Karvonen %HRR — bounds are yours to tune.
Sources
Works with the sensor you already own
Apple Watch
Start on iPhone, stream from the wrist. A real workout session keeps heart rate flowing and saves to Apple Health.
Bluetooth straps & armbands
Polar, Garmin, Wahoo, COROS — any sensor speaking the standard Bluetooth LE heart-rate service connects directly. No watch required.
Phone in charge
Start, pause and finish from either device — end a watch workout right from your iPhone.
After the workout
Save it, see it, own it
Every session ends with a summary — duration, average and max HR, time in each zone. Save it to Apple Health or discard it. History and charts live in the app; the data lives with you.
No account, no servers, no analytics. That's the whole privacy policy — but you can read it anyway.
Pricing
Free to try. Pro when you're hooked.
The floating window, Apple Watch streaming and the Live Activity are free. Pulse Pro unlocks zone coloring, Bluetooth sensors, and history with charts — as a subscription or a one-time lifetime purchase.
Coming soon to the App Store