Round Timer: HIIT & Tabata gives you a clear clock for repeated work and rest periods. Start with one of six presets: Classic Tabata, Beginner HIIT, EMOM 10, AMRAP 20, Boxing rounds or Sprint intervals.

Create a named workout with your own work seconds, rest seconds, rounds and 1–10 sets. Add preparation and cooldown time, then enter exercise labels in the order you want to see them. Check the total before starting. A single set omits its final rest; workouts with multiple sets include every trailing rest.

Follow the current phase, remaining time and round count. Choose tones and voice cues, pause when needed, or skip to the next interval. Available speech voices depend on your device. Save custom workouts locally, review finished and stopped sessions, share a session or delete records you no longer need.

This edition is free, with no ads or purchases. Presets, settings and session history stay on your device. There are no accounts or analytics.

For the published iPhone app, Android release information and timer setup details, visit https://tabatatimeronline.com.