Interval Timer ++

What It Does

Interval Timer ++ is an award-winning mobile application designed for high-intensity interval training (HIIT) and circuit workouts. Available on iPhone and Apple Watch, it provides a simple yet powerful way to structure workout sessions with customizable work/rest intervals, making it ideal for fitness enthusiasts who need precise timing during their training routines.

Key Features & Capabilities

• One-Touch Setup: Quickly configure workout duration (2 seconds to 8 minutes), rest periods (0 to 8 minutes), and repetitions (up to 20 times free, 50+ with premium)
• Multiple Timer Management: Create, name, and organize unlimited custom timers for different workout types with swipe-to-delete and drag-and-drop reordering
• Premium Workout Templates: Pre-built timers mixing various exercise types including Planks, Jumping Jacks, Push Ups, Sit Ups, High Knees, Side Planks, Butt Kicks, Side Lunges, and Lunges
• Apple Watch Support: Full native support for working out directly from your wrist
• Background Notifications: Continue workouts while browsing other apps or with the screen locked
• Audio & Haptic Feedback: Customizable countdown sounds, vibration alerts between intervals, and music playback compatibility with automatic volume adjustment
• Health App Integration: Syncs with HealthKit to track and visualize workout sessions and step data
• Calendar View: Review your complete workout history with detailed session information
• Flexible Controls: Pause, resume, or reset workouts at any time; 10-second countdown before each interval

Who It's For

This app serves home fitness enthusiasts, gym-goers, personal trainers, and anyone following HIIT, Tabata, or circuit training protocols. Its clean, colorful interface and straightforward controls make it accessible for beginners while offering the depth and customization that advanced users demand.

Pricing & Premium Features

The app is free to download with in-app purchases available. Interval Timer Pro (available via monthly subscription, annual subscription, or one-time purchase) unlocks unlimited custom timers, premium workout templates, and extended repetition counts beyond 20. The app has earned a 4.8-star rating from over 15,000 users who consistently praise its simplicity, reliability, and eye-catching design.