Originally Posted by
hokiefyd
Recall that I'd like to keep track of each of my bikes' mileage (odometer) individually, which wouldn't be possible if I used the same unit on multiple bikes. I also have a variety of bikes with different tire circumferences, so I wouldn't get an accurate reading with some of them.
Take a look at Cyclemeter. As I stated above, it will use the wheel size of the bike that you are currently riding. And while the app's odometer will only give you the total number of miles for all rides on all bikes, the app will show the number of miles ridden on each bike and the number of times the bike has been ridden, in the bike list.