You could do this with Rule Machine.
Setup 3 Rules.
Rule 1 will be if your phone is present and hers is not.
Rule 2 will be if her phone is present and yours is not.
Rule 3 will be if both phones are present.
You could do this with Rule Machine.
Setup 3 Rules.
Rule 1 will be if your phone is present and hers is not.
Rule 2 will be if her phone is present and yours is not.
Rule 3 will be if both phones are present.