ZoneCue Cardio
Change sensorJoin the Android beta
Polar · Free Android beta

Turn your Polar sensor into live cardio guidance.

A compatible Polar sensor can send live heart rate over Bluetooth. ZoneCue Cardio turns that real-time signal into proactive voice and vibration cues that help you stay aligned with your workout target.

Apply to beta test →See how it connects

Requires Android and a Polar sensor broadcasting heart rate over Bluetooth.

LIVE WORKOUT
18:42
♥132BPM
ZONE 2Dialed In
TIME IN ZONE14:08
ZONE DISCIPLINE92%
GOAL30 min
COACHING CUEDialed In
01
POLARBroadcasts your live heart rate
→
02
ZONECUEMonitors your target and goal
→
03
YOUHear when to push or ease up

Connect Polar

From live heart rate to live guidance.

Requires Android and a Polar sensor broadcasting heart rate over Bluetooth.

  1. 01

    Wear and activate your Polar sensor according to its instructions.

  2. 02

    Make sure its Bluetooth heart-rate connection is available to ZoneCue Cardio.

  3. 03

    Select the sensor in ZoneCue, choose your zones and goal, then begin your workout.

What ZoneCue adds to Polar

Keep the sensor you trust. Add coaching built for the workout.

Polar offers capable heart-rate sensors and a broad training ecosystem. ZoneCue adds a focused Android coaching layer that uses the sensor’s live Bluetooth signal to guide the session in real time.

01

Proactive, not passive

Hear and feel when to make a small adjustment while the workout is happening.

02

Your zone methodology

Use maximum heart rate, heart-rate reserve or fully custom ranges instead of adapting to one fixed model.

03

Flexible workout design

Move between steady aerobic work, 4×4 intervals and studio-style zone sessions without changing sensors.

04

Execution-focused review

Review zone discipline, recovery, aerobic efficiency, exertion and the trends that help refine your next session.

One community. Many sensors.

Help build cardio coaching that works across devices.

ZoneCue brings users with different sensors into one beta community. Together, testers can share what works, identify connection differences and shape features around real workouts—not one hardware ecosystem.

Join with Polar →

Learn across devices

Compare zone strategies and workout structures with people using different sensors.

Improve compatibility

Report real connection behavior so support can become broader and more reliable.

Shape the roadmap

Help prioritize the coaching, goals and insights that matter during actual training.

Join the tester community

Two workouts. Fourteen days. Honest feedback.

  1. 1

    Join the closed Google Play test using the Google Account email in your application.

  2. 2

    Complete at least two cardio workouts and test the Polar connection and coaching cues.

  3. 3

    Tell us what happened—including bugs, confusing moments and features that helped.

Limited beta

Ready to put your heart-rate data to work?

We’re looking for a mix of Android phones, heart-rate sensors and cardio routines. The beta is free, and every current feature is included.

You’re a good fit if you:

  • ✓ Use an Android phone
  • ✓ Have a compatible broadcasting sensor
  • ✓ Train with heart-rate zones
  • ✓ Can test during two or more workouts

Beta application

Help shape ZoneCue Cardio

Android + a compatible Polar device required. Fields marked with * are required.

What cardio activities do you do? *

By applying, you agree that we may use your information to administer the beta as described in our Privacy Notice.

Prefer to wait?

Get notified when ZoneCue Cardio launches.

Interested, but not ready to beta test? Join the launch list and we’ll let you know when the Android app becomes publicly available.

By joining, you agree to receive an email when ZoneCue Cardio becomes publicly available. See our Privacy Notice.

Please read before applying

Beta and exercise disclaimer

ZoneCue Cardio is beta software intended for general fitness and informational purposes only. It is not a medical device and does not provide medical advice, diagnosis or treatment. Heart-rate readings, alerts and workout guidance may be delayed, interrupted or inaccurate. Consult a qualified healthcare professional before beginning or changing an exercise program, and stop exercising if you experience pain, dizziness, unusual shortness of breath or other concerning symptoms. Participation is voluntary and use of the beta is at your own risk.

ZoneCue Cardio is an independent app and is not affiliated with or endorsed by WHOOP, Polar, Garmin, Wahoo or Orangetheory Fitness.