TRounds vs Mariabs · Interval Timer

Stop wasting time fumbling with a stopwatch. TRounds is the interval timer that serious athletes actually use — obsessively precise, brutally simple, and built to push you harder. Whether you're crushing Tabata, boxing rounds, or designing your own custom protocol, TRounds keeps you locked in. Big, color-coded countdowns. Haptic feedback on every phase change. Audio cues that fire the moment each interval switches — so your eyes stay on the work, not the screen. And when the session ends, the data tells the whole story. A 365-day heatmap shows every workout you've completed. Streak counters keep you honest. Completion rates reveal the truth. Weekly bar charts track your momentum. No cloud. No account. No excuses — everything lives on your device, private by default. --- 6 BATTLE-TESTED PRESETS --- Classic Tabata: 20s on / 10s off / 8 rounds. The original protocol that changed fitness forever. HIIT Beginner: 30s on / 30s off / 6 rounds. The perfect starting point. Fight Club: 45s on / 15s off / 10 rounds. Train like a fighter. Endurance Beast: 60s on / 20s off / 12 rounds. Build serious stamina. Quick Burn: 15s on / 5s off / 16 rounds. Fast and absolutely furious. Boxing: 3 min rounds / 1 min rest / 12 rounds. Classic gym-style training. --- BUILD YOUR OWN --- Create unlimited custom presets. Set work time (5-300s), rest time (5-60s), and rounds (1-30) exactly the way your training demands. Save them. Use them every session. --- SMART ANALYTICS --- - 365-day workout heatmap calendar - 12-week activity bar chart - Current streak and longest streak - Total sessions and total time trained - Completion rate tracking - Expandable recent session history --- BUILT DIFFERENT --- - Zero accounts. Zero cloud. Zero tracking. - All data stored on-device, permanently private. - Background audio so the timer keeps firing even when your screen locks. - Dark, distraction-free UI designed for the gym floor, not the boardroom. Download free. Train harder.

Mariabs is a sharp, minimal interval timer for anyone who trains in rounds — tabata, HIIT, EMOM, circuits, or your own custom intervals. Set your prepare, work, rest, cycles, blocks, and block-rest durations in seconds. Press the white play button. Mariabs counts you in, calls out each phase, and chimes the final 3-2-1 of every interval so you can keep your eyes on what you're doing instead of on the screen. WHAT YOU GET • Six adjustable parameters: prepare, work, rest, cycles per block, number of blocks, and rest between blocks • Voice cues for every transition: "Prepare", "Work", "Rest", and "Block complete — get ready for the next" • Distinct musical chimes per phase, generated on-device, synced with light haptics • 3-2-1 countdown ticks before each phase change • Big, monochrome timer dial with a subtle progress ring tinted to the current phase • Cycle and block progress shown at all times so you always know where you are • Plays over whatever you're already listening to — music, podcasts, anything — and lowers it only for the moment Mariabs speaks • Stays awake automatically while a workout is running • Settings remembered between launches DESIGNED TO STAY OUT OF THE WAY The screen is dark, glanceable from across a gym, and built around one button. There are no menus, no levels, no streaks, no badges, no analytics. You configure once, then press play. PRIVACY Mariabs collects nothing. No account. No email. No analytics. No tracking. Your settings stay on your device. The privacy policy is one page; you can read it before you tap install. NO ADS Mariabs has no ads, no in-app purchases, and no premium tier. No account required.