1. What's the oldest apple watch that supports heart monitoring?
2. Do the newer models monitor any better?
3. Are batteries replaceable in apple watches?
Considering buying something used/cheap just to be defensive as I get older but don't want to spend a lot.
2. Do the newer models monitor any better?
3. Are batteries replaceable in apple watches?
Considering buying something used/cheap just to be defensive as I get older but don't want to spend a lot.