Ninety seconds bridges the one- and two-minute beats — the interval for tasks that need a little longer than a minute each. A stage in a process, a longer drill round, a paced cycle you want marked without watching: the single beep calls each minute and a half so you can work straight through it.
It is the beat for when a minute clips a task short but two minutes leaves you waiting. Leave it running for the length of the cycle and it holds the same pace throughout.
A once-a-minute pulse — a beep every minute, on repeat, for pacing exam questions, pages, or drill stations by the clock. Free in any browser, no sign-up.
A relaxed two-minute beat: one beep every 2 minutes, repeating, for longer process stages, rotations that need real time, and move-on cues.