KREW seems promising for Android

[Tenshuu]

All of my issues with 'stability' ended up stemming from my PM5 firmware not being completely up to date- I bought my erg with the PM5 back in 2014 I believe, not sure if that's 1st gen or not.

That is a first gen PM5. Current firmware is V30.
https://www.concept2.com/service/monitors/pm5/firmware

I was incorrect on my purchase date, looked back, April 2016. Thanks for the link, I had never seen the pm5 timeline before.

[Pie Man]

The Krew app now supports pm3/4 via usb although there are issues if you are have a log card inserted (fine with USB)
The app itself seems good, developers have a facebook page and respond quickly to questions etc.

[Dicentim]

Hi,
There's the Pete plan in this app so it's great to access every workout with 1 click.