Apple’s September Ultra 4 launch added a Readiness score from 0 to 10 with plain-language recommendations such as Recover, Pace Yourself, Ready and Go For It. It combines recent activity, training load, vitals and sleep, and can update during the day.
This is a useful feature to evaluate even if you do not want a new watch. The important question is whether a recovery indicator changes a real decision—such as whether to take a harder workout—or merely adds another number to check.
Compare the published feature list with the Apple Watch you already wear, including battery life and sensor differences. Do not assume Readiness is available on older models just because they run a similar watchOS version; check compatibility before considering an upgrade.