You can probably just use one of the fitness bracelets (Fitbit style) and sync them to your phone. I don’t know how reliable they are, but one of their explicit purposes is recording your heart rate during exercise.
Losing the heart rate connection for a few seconds during exercising isn’t a big deal.
The old tech with chest straps certainly loses signals from time to time.
I’m not sure about the newer tech, but I would doubt that you get cheap tech that doesn’t from time to time loses track of the pulse.
You can probably just use one of the fitness bracelets (Fitbit style) and sync them to your phone. I don’t know how reliable they are, but one of their explicit purposes is recording your heart rate during exercise.
Losing the heart rate connection for a few seconds during exercising isn’t a big deal.
The old tech with chest straps certainly loses signals from time to time. I’m not sure about the newer tech, but I would doubt that you get cheap tech that doesn’t from time to time loses track of the pulse.