Tabata. HIIT. AMRAP. EMOM. Boxing. Voice cues call every phase. Volume buttons skip them. You never break to look at a screen.
Download R3P5Small buttons. Tiny numbers. Tap-to-pause when your hands are wrapped, gloved, sweaty, or holding something heavy. R3P5 was built for the gym floor, not the App Store screenshot.
Your phase changes get called out in your earbuds. Vol+ pauses. Vol− skips. The countdown fills the whole screen so you can read it from across the floor. The phone stays put. You stay in the round.