What the polar does not have as an ECG device is SpO2 obviosly (don't see that for their opticals either though).
I do have a pollux 400 here, which can measure and record SpO2, but this has no bluetooth so sync will be more effort.
Ah, I will have a think, perhaps getting something for that makes more sense.
I have access to a Blood Pressure cuff when we have got the basics sorted. I don't know of any devices that claim to do BP without requiring calibration, nor in motion, so lack of Bluetooth isn't a big deal there.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
What the polar does not have as an ECG device is SpO2 obviosly (don't see that for their opticals either though).
I do have a pollux 400 here, which can measure and record SpO2, but this has no bluetooth so sync will be more effort.