I use both an Apple Watch and a Kardia device to monitor heart rate. Both are very helpful.
The Apple watch will send me a message/vibrate when my heart rate exceeds certain parameters.
You can get an average heart rate or a single lead ECG.
The Kardia is a bit more accurate and you can easily download the ECG either single lead or six lead and forward to your EP doctor if necessary.
Go to [
www.kardia.com] for info on that device or Apple for the watch.
Best of luck.
Tony