Interval Timer
v2.1
Engineered for athletes who want an instant, across-the-room readable interval timer for Tabata, HIIT, Boxing, Circuit, and EMOM—with zero ads, zero subscriptions, and zero telemetry.
1:1 live engine — press Space or tap Pause / Start, or pause to open Workouts & Settings
When your heart rate is at 175 BPM, tiny grey labels fail. Interval Timer floods the entire viewport with unmistakable, high-contrast phase colors and oversized tabular numerals. Click any phase below to jump the live timer directly to that state.
Every interaction is tuned for sweaty hands, noisy gym floors, and locked screens—powered by a deterministic state machine that never drifts.
Distinct harmonic chimes and physical motor pulses cut through loud gym playlists while letting your background music keep playing. Click any cue below to audition the actual in-app sound synthesis:
Backed by a native Android Foreground Service, your countdown, chimes, and Pause/Resume controls stay live right on your lock screen without drifting when your display turns off.
The outer card border maps every Prepare, Work, and Rest segment of your entire routine clockwise from top-center, while the inner ROUND badge border tracks the exact time elapsed in your current interval.
Built-in presets for Tabata (20/10), HIIT (30/15), Circuit (45/15), Boxing (3m/1m), EMOM (10m), and Quick (15/5). Long-press any card to reorder your grid with fluid spring physics.
No analytics SDKs, no crash-reporting spyware, no login walls, and no "Start 7-Day Free Trial" popups before your set. 100% local storage with instant offline cold start.
Build everything from classic Tabata sets to multi-block conditioning pyramids and compound circuits. Try the actual 1:1 Edit Workout drawer below—toggle steps between WORK and REST, drag to reorder or move steps between blocks, and save directly into the live timer above.
Unlike rigid timers that lock you into a single Work/Rest pair, Interval Timer 2.1 lets you combine standalone steps with multi-step Repeat Blocks, label individual exercises ("Push-ups, squats..."), and automatically skip the redundant final rest interval so your workout finishes the moment your last rep ends.
00:20) or rounds pill (8 Rounds ⌄) to open the tactile wheel-picker drawer
Every screen is captured directly from the native build—zero marketing mockups, zero fake UI overlays, and zero clutter.
Color-coded preset cards with total round & duration summaries and drag-and-drop reordering.
Full-bleed emerald state with hundredths precision and segmented perimeter progress border.
High-contrast recovery countdown with "→ UP NEXT: WORK" preview badge and remaining session time.
Configure preparation countdowns, multi-step repeat blocks, custom step names, and final-rest skipping.
Unmistakable electric blue completion screen with instant 1-tap Restart for multi-set conditioning.
Independent toggles for countdown sound effects and physical motor vibrations—nothing else to get in your way.
Most fitness timers on Google Play hold basic interval customization hostage behind $49/year subscriptions and 30-second video ads. Interval Timer is built to respect your training and your privacy.
| Capability | Interval Timer v2.1 | Typical Store Timers |
|---|---|---|
| Price & Subscriptions | 100% Free Forever ($0) | $4.99/wk or $49.99/yr paywalls |
| Advertisements | Zero ads or popups | Full-screen video ads between sets |
| Repeat Blocks & Custom Steps | Included (Unlimited routines) | Locked behind "Pro" tier |
| Lock Screen & Background Service | Native Foreground Service + Controls | Frequently stops when screen locks |
| Account & Telemetry | Zero sign-up, zero tracking, 100% offline | Mandatory login & ad-network trackers |