Build a routine by naming exercises and choosing sets, reps, rest after a set, and the seconds spent lifting, holding, and lowering. The timer shows each phase and the current set so you can pace reps consistently instead of rushing through them.
For example, two seconds to lift, one to hold, and three to lower makes a six-second rep; eight reps take 48 seconds of paced movement before rest. Fullscreen keeps the countdown, exercise plan, progress, and controls visible on a sideways phone. Your routine stays in this browser; this timer is a pacing aid, not individualized exercise advice.