A two-second beat is slow enough to act on each tick yet quick enough to keep things moving. Breathe to it, lift to it, or call a walking or stepping rhythm that one tick a second would make frantic. It loops until you stop it, so settle into the rhythm and let it run as long as you like.
For paced breathing it gives a calm in-and-out you can hold for minutes; on a controlled lift it marks an even tempo through each phase. Two seconds leaves room to react to a tick rather than chase it.
One clean beep a second, on repeat — a metronome-style tick for counting reps aloud, pacing reaction drills, and holding a one-per-second cadence. Runs in your browser, no install.
Tempo lifting, paced photography, a steady drill cadence — a deliberate beep every 3 seconds, on repeat. No account, no install.