I am with @Fuzzyligic here and get SmartTiles for sure. I basically don’t even load the app on her phone and simply pin the a specially formatted SmartTile home page just for her understanding and maximum WAF. I ended up mounting a tablet running her SmartTiles page on the wall for her.
If for some reason your wife prefers using the mobile app you also have an option to use a custom device
Mode Switch device/app by @gkl_sf I use both. I ended up renaming the Mode switch to .Mode Indicator then I put the period in front to cause it to always display first in the things list.
FYI: Not too long ago the mode use to display all the time on the Things page. When ST ended up removing it in favor of the thin pictureless header we now “enjoy” it was a major upset to the WAF. I don’t know who they were talking to about that change but it certainly wasn’t the wives. 
