MapMyRun No Cellular Coverage
Using the iPhone 5 with no Cellular and MapMyRun+
Can you still use MapMyRun+ with an old iPhone that no longer has cellular enable?
The answer is yes, MapMyRun will still record your activity, but what you won't get it a nice map route of your run. You will still get the speed and duration of your run. Many cases, this is the most important part of tracking your workout.
Here's a screenshot of a walk I did to Dunkin Donuts in 2016:
So if you don't care about people knowing where you run/walk then, by all means, use you non-cellular phone with your workout. But, if you like to track your running territory then use your current iPhone.
This is good to know if you upgraded to a bigger phone and want to take an iPhone 4 or 5 out running.
I'll have to look for a decent iPhone Plus holder for my future runs.