Heart Alert

Heart Alert connects to your Bluetooth heart rate monitor and plays a sound the moment your BPM goes above or below the range you set. Choose a minimum and a maximum, put your phone away, and train by ear.

No screen-watching. No zone math. No account.

How it works
1. Put on your Bluetooth heart rate monitor or chest strap.
2. Set your min and max BPM.
3. Press start — you get an alert when you drift too high or too low, and another one when you are back in range.

Features
– Custom minimum and maximum BPM limits
– High heart rate alerts and low heart rate alerts
– Immediate audio alerts, with adjustable volume
– Optional vibration
– Repeat interval of 1, 3, 5 or 10 seconds while you are out of range
– "Out of range for" delay, so a short spike or a passing dip stays quiet
– Initial delay, to keep things silent during your warm-up
– Sensor battery level at a glance
– Runs in the background while you use another app
– Fast setup, nothing to sign up for

Works with your heart rate monitor
Supports most compatible Bluetooth Low Energy (BLE) heart rate monitors, chest straps and armbands, including:
– Polar H10, H9, H7, OH1 and Verity Sense
– Garmin, Wahoo TICKR, CooSpo, Scosche, Decathlon and more

Any sensor that broadcasts a standard Bluetooth LE heart rate signal should work, though Bluetooth on its own does not guarantee compatibility. If yours is not detected, send the developer a message.

An external heart rate sensor is required. Camera-based and wrist-only phone measurement are not supported.

Made for
– Zone 2 work and aerobic base building
– Running, cycling and indoor cycling
– Cardio, gym sessions and interval training
– Endurance and steady-state efforts
– Easy recovery days, where the whole point is keeping the effort down
– Anyone who wants a heart rate alarm and nothing else

Why an alarm instead of a display?
A number on a screen only helps if you look at it. An alert means your target range takes care of itself, and you only think about it when something actually needs attention — on the treadmill, on the road, or with your phone in a jersey pocket.

Pricing
Your first 5 tracking sessions are free. Unlimited tracking is a one-time purchase. No subscription, no ads.

Privacy
Heart Alert has no internet permission at all. Your heart rate never leaves your phone.

Important: background use
The app keeps tracking in the background, but Android may shut it down to save battery. To prevent this, see dontkillmyapp.com.

Heart Alert is a fitness and training tool. It is not a medical device, it is not intended to diagnose, treat, cure or prevent any disease, and it should not be relied on for emergency or continuous health monitoring. Check with a doctor if you have questions about your heart rate or your training.

Recent changes:
– Added language setting