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Excellent open source app. It can be connected to Polar H10 chest strap. The developer is so good and intellectual that he has provided all the features requested. Now it can also alert if the strap is disconnected or zero like for some people the heart beat completely stopped for few minutes (useful especially while sleep or exercise) in addition to high low heart beat. Earlier it was called Polar Alert
★★★★★Admin Elevation650· Mar 20, 2026
Better than the professiona apps! Why? Because it's SIMPLE. When I'm working out I don't want to look at the app, I just want to know if my heart is in the zone. For my morning readiness reading I use Polar Sensor Logger for 3 minutes, upload that to Gemini, and it gives me better feedback than Polar, HRV4Training, or Elite HRV. For my workouts, I run Polar Sensor Logger in the background and use this to keep me in that days zone. I was making my own app when I found this. Use this!
★★★★★Laib· Sep 8, 2025
I've been looking for just this functionality in an app, and I was so surprised that it wasn't already incorporated into Polar Beats. Thank you for providing this.
★★★★★Hadi Zadeh· Jan 27, 2026
Great app!! If you need a realtime heart rate monitor with min/max heart rate alerts that can pick it up from. Polar and other devices, this is it.
★☆☆☆☆Theo· Apr 22, 2026
Couldn't pick up on a single device in the area, not even my fit bit that was on, connected, and less that 10 cm away from it
★☆☆☆☆Ricky Kean· Nov 23, 2024
Will not connect to polar H₉, just does not work.
Google Play Rankings for Heart Alert
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Technologies used by Heart Alert
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