Hi Product Hunt 👋 I'm Alex, and I built Pulz8.

Gyms running HYROX and hybrid classes want to see who's working hard and who's coasting, but the usual live heart-rate systems need a hub, a dedicated app and per-seat pricing. I wanted something a coach could set up in five minutes with the straps athletes already own.

How it works:

Pair Bluetooth chest straps and armbands (Polar, Garmin, Wahoo, Coospo and others) straight from Chrome or Edge. No hub, nothing to install.
Assign each strap to an athlete once. Pulz8 remembers it, along with their own max heart rate and zones.
Go live on the gym TV. Every athlete gets a tile with % of max, BPM and zone, readable from across the room.
Review after class: time in zone for the group and a heart-rate chart for each athlete.

It's free for one athlete training on their own. Gyms pay €49 a month (or €490 a year) with every athlete included, and there's a 7-day trial with no card.

You can try the live board with 12 simulated athletes, no sign-up: app.pulz8.com/?demo=1

One honest limit: Web Bluetooth doesn't work in Safari or on iPhone/iPad, so the board needs Chrome or Edge on a computer or Android device.

I'd love feedback from coaches and anyone who trains by heart rate. What would you want on the board?