KneesUp
Guru
I get what you are saying @PpPete - but I don't think of the second device as a 'phone' per se - just as a computer that is marketed as a phone. The beauty of a computer running android is that you can get it to do pretty much anything, whereas locked down computers like Garmins can only do what Garmin allow. So I could use my computer to work out which star is which, or to record voice notes about my travels, or to update a blog, or to read books, for example. And I could add things like bluetooth cadence, heart rate and power sensors if I ever felt the urge.