HIIT Timer - Interval Flex 4+

Create complex HIIT and breathwork sequences that simple timers can't handle. Perfect for advanced workouts and meditation.

Interval Flex: Advanced Interval Timer

Create complex interval sequences that simple timers can't handle. Perfect for HIIT workouts with group repetitions, breathwork patterns like 4-7-8 breathing, and pyramid training routines.

Why Choose Interval Flex:

- Complex Patterns: Group intervals and repeat sections - ideal for boxing rounds, Tabata circuits, and breathing exercises
- Smart Grouping: Set up sequences like "warm-up, then repeat high-intensity/rest 5 times, then cool-down"
- Breathwork Templates: Pre-built sequences for 4-7-8 breathing, box breathing, and custom patterns
- Template Library: HIIT, Tabata, pyramid workouts, and meditation timers ready to use
- Visual Feedback: See which intervals are grouped and how many repetitions remain
- Multisensory Alerts: Sound, vibration, and visual cues for seamless transitions

Perfect For:
- Complex HIIT workouts with grouped intervals
- Breathwork and meditation sequences
- Tabata training with custom rest periods
- Pyramid interval training
- Any timing pattern simple apps can't create

Built for users who need more than basic 30-second/10-second timers. If you've been frustrated by simple interval apps, Interval Flex gives you the flexibility to create exactly the sequences you need.

Download now and build the perfect timer for your routine!