Quiet enough to wear. Steady enough to trust.
A comfortable, professional-grade wrist sensor — built with Polar, who's been making wearable hardware for over forty years.
Designed for all-day wear. Built for accuracy.
Soft fabric band, ~29g. Sleep in it. Work out in it. Forget it's there.
WR30, swim-rated by Polar. Shower, swim, sweat — no need to take it off.
Charges fully in ~90 minutes. Plan one quick top-up per week.
Pairs in seconds. Buffers offline — syncs when you're back.
The technical detail.
| Sensor | PPI (pulse-to-pulse interval) from PPG · 24/7 heart rate |
| Motion | Accelerometer · 50 Hz · 16-bit · ±8 G |
| Temperature | Skin temperature, continuous |
| Sleep | Stage detection (light, deep, REM) |
| Activity | Step count, energy expenditure |
| Storage | Offline buffering · up to 72 hours |
| Connectivity | BLE 5.x · iPhone (iOS 16+) |
| Battery | ~7 days typical · ~90 min full charge |
| Charging | USB charger included |
| Water rating | WR30 — swim-rated (Polar spec) |
| Materials | SoftWeave fabric band · professional-grade sensor |
| Weight | ~29g with band |
Everything you need to be live in ten minutes.
With the silicone band attached.
Clips on; any USB port.
S and M–L, both in Polar's box.
Our quick-start lives at /quick-start.
Pairs with the things you already own.
| iPhone | iOS 16 and later · TestFlight during the pilot |
| Android | On the roadmap |
Light upkeep. Rare attention.
You're a step ahead.
That's the band WiseHeart runs on. Join early access and we'll activate it when your wave opens — free while we test.
Full sensor and electrical reference.
The underlying platform the bracelet builds on.
Baseline, artifact screening, and what the signal means.