Not sure what to tell you about it. Maybe rebooting your tablet. I've been dealing with DJI and the Pilot App for what seems to be like an eternity and I was spoiled at how simple the Solo App is, compared to Pilot and or Tower.
Please, please don't compare the solo app to the Tower app.
It's like comparing the earth to the moon..
It's round...
That's were it ends, it may be made up of the same components but completely more complex.
The Solo App is a very simple app and it's functionality is limited to the solo.
Tower is a lightweight version of Mission Planner and is capable of many things to numerous to talk about here.
As for the issue with imperial to metric or vs versa I know raw data is always metric and I don't know if the app is capable of changing that yet, ,
If it is, please let me know as I didn't have any luck in doing so , I couldn't get it to change on my solo app. .
Again the solo controller screen is setup in metric also so if you can't change the solo TX screen I wouldn't bother changing from metric to imperial for the simple reason of making mistakes..
Wasn't it a few years ago one of the missions to Mars failed because one person inputted metric data and another imperial data and the lander opened its parachute at ground level or something along that line?
Mistakes can happen if you're trying to read two differant measurements and keep them clear in your head. ..
Ask the boys at JPL...
What I'm trying to say is, , unless the Solo TX can be changed from metric to imperial I personally would not change the app, ,
Just asking for troube .. but that's me. .