@jmjm @jessamyn

I'd add MACRODROID is a fantastic complement to BIG launcher.

I've set it up so it auto answers from a.white list of numbers and blocks others.

A one touch button will call designated numbers, defaulting to WhatsApp voice if in WiFi range.

It can also reply to a SMS from one of the same numbers with location information.

And ring/vibrate as when their phone disconnects from their Bluetooth hearing aid (eg they've left it behind)