iPhone Screenshots


This app warns you with audio (even in background) when your heart rate goes beyond the limits you set.

NOTICE Apple Watch users: you will still require a bluetooth sensor and background monitoring is not supported by apple on apple watch.
NOTICE: if you use this app at the same time with other fitness apps that use bluetooth, it is recommended to start cardio alarm app FIRST. This will avoid problems with bluetooth device discovery. It is known that some apps keep searching for bluetooth devices all the time, preventing other apps like this one from detecting bluetooth devices.

It will warn you with auditive voice warning even if being in background and/or listening to music. Perfect for working out outdoors!

This app needs a bluetooth 4.0 low energy (BLE) or bluetooth smart heart rate sensor in order to work. Some of the known working sensors are:
- Polar H6
- Polar H7
- Wahoo tickr
- Beets BLU
- Oregon Scientific BLE Fabric Chest Belt
- Runtastic heart rate combo monitor
- Mio Link
- Mio Alpha
- Geonaute BLE
- Sigma HRM

Such sensors are only compatible iPhone 4S or newer, which have bluetooth 4.0.

Disclaimer: do not use this app for medical or critical life purposes.

What’s New

Version 1.5

Apple Watch support.
Notice that with apple watch app you will still require a bluetooth sensor and background monitoring is not supported by apple.

Ratings and Reviews

2.5 out of 5
11 Ratings

11 Ratings

GunnerKit ,

needs fix & haptic touch option

I've been looking for an app just like this which warns you when you are outside your target heart rate zone. Most heart rate apps have predefined zones but this app lets you create your own custom zone, which is great.

The major problem for me was that while the iPhone app could finds my Bluetooth heart rate sensor fine, the Apple watch app couldn't find it all. This needs to be fixed urgently.

A great enhancement would be if the app could give either an audio warning OR a haptic tap to the apple watch which is more discreet when I'm running outside.

I'll give it a modest rating now but will upgrade to 4 star if the problem is solved and 5 star if the enhancement is made.

R8nd0mN8me ,

Exactly what I needed

Works great for me on iPhone 5s, iOS 9.3.2 with a Polar H7. Per the instructions this app has to connect to the HR monitor first, and that means making sure Apple Health is not connected to it. After this app is connected I can connect Apple Health and Nike+ Running. This app audibly alerts when my heart rate exceeds the max I set, even when in the background, so I don't have to constantly look at my phone while on a run. Exactly what I needed!

CRByrne ,

Needs a lower limit to make it perfect

I was able to connect this app with my wrist heart rate monitor. FWIW - I use a Basis Peak (had to unpair it with Basis app first in order to make the connection).

My problem is that the lowest possible heart rate is 50, but my resting heart rate dips into the 40s, so it's constantly alarming.

If this could be fixed, this would be a perfect app for my needs. Seems simple... just a tiny software tweak. Is that possible?


Ignasi Artigas Cucurella
1.2 MB

Requires iOS 7.0 or later. Compatible with iPhone 4s, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6S, iPhone 6S Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPad Wi-Fi (3rd generation), iPad (3rd generation) Wi‑Fi + Cellular, iPad Wi-Fi (4th generation), iPad (4th generation) Wi‑Fi + Cellular, iPad mini Wi-Fi, iPad mini Wi-Fi + Cellular, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, iPad Pro (9.7‑inch), iPad Pro (9.7-inch) Wi‑Fi + Cellular, iPad (5th generation), iPad (5th generation) Wi‑Fi + Cellular, iPad Pro (12.9‑inch) (2nd generation), iPad Pro (12.9‑inch) (2nd generation) Wi‑Fi + Cellular, iPad Pro (10.5‑inch), iPad Pro (10.5-inch) Wi‑Fi + Cellular, iPad (6th generation), iPad Wi-Fi + Cellular (6th generation), iPad Pro (11-inch), iPad Pro (11-inch) Wi-Fi + Cellular, iPad Pro (12.9-inch), iPad Pro (12.9-inch) Wi‑Fi + Cellular, iPad mini (5th generation), iPad mini (5th generation) Wi-Fi + Cellular, iPad Air (3rd generation), iPad Air (3rd generation) Wi-Fi + Cellular, and iPod touch.


English, Catalan, Spanish

Age Rating
Rated 4+
© 2015 Ignasi Artigas


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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