Presence Detector

Do you have three separate SmartThings accounts, each one active on only one device?

If you are also signed into SmartThings on a tablet and a tablet stays home, that can throw everything off. Or if you used your own SmartThings account to sign in on your wife’s phone, that creates problems as well.

Also, the SmartThings presence App requires that the phone have Internet access and a data plan. We have had some community members in the past who had children with those that did not have a data plan and the presence feature did not work for those devices.

The following might be of interest: