YMMV but as a teenager I devised my own low tech solution: I taught my cat her name. We lived in a rural-ish area with little traffic and a large wooded area behind the house. She would be outside for sometimes 10 hours/day and if I ever needed her, I would shout her name from the back porch or partway into the back yard. Instant cat in <10 minutes.

Except during or in the leadup to thunderstorms. She was afraid of thunder and would hide.