Every stretching routine has the same problem: somebody has to watch the clock. Count the seconds, remember when to switch sides, track how many reps are left — all while you're trying to actually relax into the stretch. ExtendTimer exists to take that job off your hands.
Set a hold time, a switch-sides time, a rep count and a rest period once. Press start, and ExtendTimer runs the whole thing for you — with a distinct sound for every phase, so you always know what to do next without opening your eyes or checking a screen. Build a routine out of multiple stretches and it carries you straight through, phase by phase, stretch by stretch.
Single stretches and routines of up to two stretches are free forever, no account required. As a visitor you'll see the occasional ad — create a free account and those go away, plus you get stretch tracking and saved routines, at no cost.
If you build longer routines or want full control over every sound, Pro unlocks unlimited stretches per routine, unlimited saved routines, the full sound studio, and the ability to upload your own custom sounds for any phase — for $4.99 a month or $29.99 a year.
ExtendTimer is a progressive web app. Open it once while connected — ideally installed to your home screen — and it keeps working without a connection after that, sounds included, so a spotty signal mid-stretch doesn't interrupt a session.