I'm not familiar w/the app/device drivers in use with your shades, but shades are supported in the Room Lighting app. If your shades expose a % close/open setting, you should be able to use an RL scene set to activate based on time, or as a switch in a dashboard, to get what you want.
Set the shades to the desired opening manually (all three of them) then capture them as a scene in the Room Lighting app, and then set that scene to come on at the specific time you want.
In Room Lighting you can create an "activator" (basically just a virtual switch created by the app that is tied to your scene) to enable/disable the scene in a dashboard. Add the scene activator to a dashboard and all your wife should have to do is tap on it to set all the shades to the desired position if she wants to control the blinds from a dashboard.
Below is an example of what the scene activator from a blinds scene I have looks like.
Off
