pulz8
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For HYROX and hybrid training gyms

Live heart-rate zones. In your browser.

See every athlete's heart-rate zone on the gym TV during HYROX and hybrid classes. Connect Bluetooth straps in Chrome. No extra receiver or app to install. Record sessions to review the results afterwards.

Start free Try the live demo

From strap to screen in four steps.

The Pulz8 live board with twelve athletes. Each tile shows percent of max heart rate, BPM and zone, coloured by zone.

  1. Pair

    Open Pulz8 in Chrome and pair each strap or armband over Bluetooth. No hub, no extra app.

  2. Assign

    Link each strap to an athlete once. Pulz8 remembers it, with their own max heart rate and zones. On a personal account, your straps are yours automatically.

  3. Go live

    Put the board on a TV or laptop. Every athlete gets a tile with % of max heart rate, BPM and zone, readable from across the room.

  4. Review

    Press Start session to record. When you end it, each athlete's session is saved with time in zone and heart rate over time.

Every session, saved and readable.

Recorded sessions land in your history with the numbers that matter: duration, average and peak heart rate, and time in each zone.

The whole class at a glance

Group time in zone, then every athlete side by side.

Each athlete's heart rate over time

Their curve drawn over their own zone bands, with minutes in each zone.

A saved session: 45 minutes, 4 athletes, average 134 and peak 171 BPM, group time in zone and a per-athlete comparison.
One athlete's heart rate over a 45-minute interval session, drawn over five zone bands, with minutes spent in each zone.

  • History per athlete

    Filter sessions by client and see how effort changes week to week.

  • Straps remember their athlete

    Assignments are stored, so a paired strap shows the right name next time.

  • Install it like an app

    Add Pulz8 to your desktop or Android home screen and get reminders for your next session.

€49 a month for your whole gym.

Just me

Free for one athlete

For athletes training by zone on their own.

  • Your live heart rate, % of max and zone
  • Your straps pair to you automatically
  • Session history with time in zone and heart-rate charts
  • Switch to a team account any time
Start free

HYROX and hybrid gyms

€49 per month, for the whole gym

For coaches running HYROX, hybrid and group classes.

  • One live board for the whole class, on a TV
  • Client profiles with their own max heart rate and zones
  • Straps assigned once, reused every session
  • Per-athlete results after every session

Or €490 a year. Every athlete included. Try it free for 7 days with no card, or book a 15-minute call and we'll set up your gym with you.

Try it free for 7 days Book a 15-minute demo

What you need.

  • Chrome or Edge on a computer or Android

    Windows, macOS, ChromeOS or Android. Safari, Firefox, iPhone and iPad can't connect to Bluetooth sensors from a web page.

  • Bluetooth heart-rate sensors

    Chest straps and armbands that broadcast standard Bluetooth heart rate, from Polar, Garmin, Wahoo, Coospo and others. Watches work if they can broadcast heart rate.

  • A TV for group sessions

    Connect the computer to a TV and the board fills the screen. Training alone, your laptop or phone is enough.

Will your strap connect?

Put on your strap or armband, turn on Bluetooth, and check it here before you sign up.

Connection check only. No heart-rate readings are shown or saved.

Find out before you start.

Choose your monitor in the Bluetooth picker. We'll check the connection, then disconnect.

Common questions.

What is Pulz8?

Pulz8 is a web app that shows live heart-rate zones from Bluetooth heart-rate sensors. It runs in Chrome or Edge, with no extra receiver or app to install. Gyms display the board on a TV during HYROX, hybrid and group classes. Individuals use it to train by zone. Record a session to review the results afterwards.

Which heart-rate sensors work?

Any chest strap, armband or watch that broadcasts standard Bluetooth Low Energy heart rate. That includes most current straps from Polar, Garmin, Wahoo and Coospo. Sensors that only speak ANT+ do not work.

Do I need to install anything?

No. Open app.pulz8.com in Chrome or Edge and sign up. You can also install it as an app from the browser for quicker access.

Does it work on iPhone, iPad or Safari?

Not yet. Pulz8 reads sensors through Web Bluetooth, which Safari, Firefox and every browser on iOS do not support. Use Chrome or Edge on Windows, macOS, ChromeOS or Android.

How many athletes can be on the board at once?

As many as your Bluetooth adapter can hold, typically 7 to 10 straps per adapter. The tiles resize to fit the screen.

How much does it cost?

Pulz8 is free for individuals. A gym pays €49 a month, or €490 a year, for the whole gym, however many athletes train with it. New gyms get 7 days free with no card. Book a 15-minute call to get set up.

How are heart-rate zones calculated?

Zones are percentages of each athlete's max heart rate: Z1 Warm Up 50-60%, Z2 Easy 60-70%, Z3 Aerobic 70-80%, Z4 Threshold 80-90% and Z5 Maximum from 90%. Max heart rate is the athlete's measured value, or estimated as 220 minus age. Zones can also be based on heart-rate reserve.

Can I switch from a personal account to a gym account?

Yes. In Settings, turn your personal account into a team. Your profile and all your sessions stay.

Put your first session on screen today.

Create a free account, pair a strap and go live in minutes. Or open the demo board first, no sign-up needed.

Start free Try the live demo

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