Burst - Smart Interval Timer
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Description
Burst is the interval timer built for people who actually train.
It's the only timer with TRUE random beeps — unpredictable cues that hit when you least expect them. Choose the duration, choose how many beeps, and the engine spreads them randomly through your round. No pattern, no anticipation. Just react.
RANDOM BEEPS — THE FEATURE NO OTHER TIMER GETS RIGHT
Boxing & combat sports: shadowbox to unpredictable attack cues
Agility drills: change direction the second the beep hits
Conditioning: break the rhythm — your body never settles into a pattern
Reaction training: real stimulus-response work for sport prep
BUILT DIFFERENT
Smart intervals: work/rest, rounds, optional exercise labels
Pyramids: auto-increasing intervals (10s - 20s - 30s - 40s...)
Distance reps: 100m × 10, manual lap stop with split times
Tabata, HIIT, AMRAP, EMOM-friendly templates
Official fitness tests with officially paced audio cues: Beep Test, Luc-Léger, Yo-Yo IR1 & IR2, Cooper, demi-Cooper, 2 km, 30-15 IFT, Gacon 45/15, T-Test, FTP cycling, RSA
AUDIO CUES THAT WORK
Distinct sounds for start, transition, 3-second warning, cue, end
Volume boost up to 3× system max — perfect for outdoor sessions or Bluetooth speakers
Plays alongside Spotify, podcasts, music apps — no conflict
Vibrations option for silent training
EVERYTHING YOU NEED
50+ ready-to-use presets across 5 categories: Endurance, CrossFit, Combat, Tests, Mobility
Custom timer builder: simple intervals, pyramids, random cues, distance, fitness tests
Favorites tab — one tap to restart your regular sessions
Session history with effort tracking, notes, and VMA / palier progression
Clean interface, readable even mid-exhaustion
Persistent notification: your timer stays alive on a locked screen
Bilingual: English & French
MADE FOR
Boxing, kickboxing, MMA, Muay Thai, BJJ, CrossFit, functional fitness, running intervals, track and field, agility prep for team sports (football, basketball, rugby), lab-grade fitness testing.
NO FRICTION
No mandatory account
No email signup
No paywall on core features
No ads during your session — only between
No bloat, no 50 useless buttons
Set it up once, save it as a favorite, and next session you're one tap away from go.
The rest is on you.