Proactive coaching
Voice and vibration cues help you adjust before or as your heart rate leaves the target zone.
ZoneCue Cardio Free Android beta
Turn your WHOOP into live cardio guidance.
WHOOP’s lesser-known Heart Rate Broadcast feature can share your heart rate in real time. ZoneCue Cardio uses it to proactively guide your workout—so you can pursue a goal while you train, instead of being surprised by the results afterward.
Requires Android and a WHOOP device with Heart Rate Broadcast enabled.
LIVE WORKOUT
18:42132BPM
ZONE 2Dialed In
TIME IN ZONE14:08
ZONE DISCIPLINE92%
GOAL30 min
COACHING CUEDialed In
01
WHOOPBroadcasts your live heart rate
→
02
ZONECUEMonitors your target and goal
→
03
YOUHear when to push or ease up
More than a zone alarm
Cardio feedback when it can still change the workout.
Choose the structure, zones and goal. ZoneCue handles the monitoring while you focus on moving.
Your zones, your method
Use maximum heart rate, heart-rate reserve or custom ranges from your own training plan.
More ways to train
Stay steady in Zone 2, complete Norwegian 4×4 intervals or create studio-style zone workouts.
Goals that guide the session
Train toward time, distance, time in zone or exertion goals—indoors or outdoors.
See what changed
Review zone discipline, recovery, aerobic efficiency, exertion and longer-term trends.
Built around HR Broadcast
Connect directly to WHOOP’s Heart Rate Broadcast over Bluetooth on your Android phone.
Learn your zones
Why Zone 2 matters
Your body uses a mix of fat and carbohydrate for energy during cardio. As intensity rises, that balance gradually changes—it is not an on/off switch.
EffortThe gas pedal
Heart rateThe dashboard gauge
Fat + carbohydrateThe fuel sources
MitochondriaAerobic engines inside your muscle cells
ZoneFat contributionCardio stimulusWhat it means
Easy and sustainable. Useful for recovery and adding activity volume.
Substantial fat contribution, meaningful aerobic conditioning and sustainable for longer sessions.
A stronger tempo effort as carbohydrate demand begins to rise.
Hard threshold work with greater reliance on glycogen and faster fatigue.
Near-maximal, carbohydrate-dominant work that is difficult to sustain.
The useful middle ground
The Zone 2 sweet spot
Zone 2 is hard enough to provide a meaningful aerobic stimulus, moderate enough to maintain substantial fat oxidation and easy enough to sustain. With consistent aerobic training, your mitochondria (aerobic engines inside your muscle cells) can become more numerous and efficient, helping you produce more energy aerobically and do more work at the same heart rate.
Zone 2 is not the only valuable training zone. It is simply one of the most practical places to build your aerobic foundation.
Keep the distinction clear
Fat burning is not the same as fat loss
A workout can emphasize fat oxidation without guaranteeing a loss of body fat. Long-term changes in body fat also depend on overall energy intake and expenditure over time.
Heart-rate zones are estimates and vary by person, method and device. This lesson is general fitness education, not medical advice.
Further reading: fat oxidation and exercise intensity · exercise and mitochondrial adaptation
What beta testers do
Two workouts. Fourteen days. Honest feedback.
- 1
Join the closed Google Play test using the Google Account email in your application.
- 2
Complete at least two cardio workouts and test the WHOOP connection and coaching cues.
- 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, WHOOP models 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 WHOOP with HR Broadcast
- ✓ Train with heart-rate zones
- ✓ Can test during two or more workouts
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.
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 or Orangetheory Fitness.