@zensaya
To change the units in the phone App, you must do it first on Desktop. The change will be applied automatically in the phone App.
For every layers ( Wind, Rain, Clouds....) you can change the units in the colour scale as shown here:

0_1534435713563_02A09023-ACAA-414F-8078-419115CF5EC1.jpeg

You can change also some units in Meteogram:

0_1534435796699_C114689A-511C-4EE0-ABBC-5065A7073E08.jpeg

In weather diagram,
1 Select Meteogram
2 Click to change unit of cloud base
3 Other units can be changed too : ºC, kt, hPa, mm
By this way it is possible to modified directly these units in the phone App