I understand. I myself am quadriparetic, use a wheelchair and have limited hand function, so I need an automatic option as well.
In my case, I use an iBeacon, which can work quite well if you have an iOS tablet to act as a receiving station, but is not as good with android.
To make it work with SmartThings, I use a third party app, geofency, which can send a webhook to IFTTT. We have had other community members in both the US and the UK use it. Note that the following thread uses the Estimote brand as an example but they no longer sell individual units. There are other brands available in different regions, you just have to search.
To be honest these days I mostly use mine directly with HomeKit since there is now native integration. But I still use geofency occasionally.
So that’s a solid reliable handsfree presence option as long as you have an iPad at home to act as a receiving station. However, integration with ST does require cloud operations and a fairly clunky integration.