Fartlek Interval Trainer 1.2.1

Fartlek Interval Trainer (FiT) is a comprehensive interval training application that offers both manual and automatic detection of running intervals, making it suitable for users seeking flexibility in their workout routines.

The app features five distinct types of manual intervals, each designed to target different training objectives:

• Flat Sets: Includes warm-up, cool-down, and alternating sets of work and rest intervals, with customizable repetitions and durations.
• Tabata: Comprises eight cycles of 20 seconds of work followed by 10 seconds of rest, adhering to the popular high-intensity interval structure.
• Pyramid Sets: Similar to Flat Sets but with progressively decreasing and then increasing durations of work and rest, making them effective for enhancing speed.
• Custom Sets: Allows users to specify exact lengths for individual work and rest intervals, offering tailored workout configurations.
• Random: Generates spontaneous intervals based on user-defined preferences, available across five difficulty levels ranging from light to very intense.

The application also incorporates an Auto Detect mode, which leverages data from the iPhone or Apple Watch to automatically identify the user’s motion type—whether running, walking, or stationary—and adjusts interval creation accordingly. This feature enhances usability by streamlining the workout setup process.

All completed workouts are seamlessly recorded within the Apple Health app, providing comprehensive data including interval start and end times, workout route, active and resting energy expenditure, average heart rate, and total distance covered.

Supports both metric and imperial units; users can select their preferred measurement system via the settings interface.

Overall, FiT presents a versatile platform suitable for athletes seeking structured interval training with intelligent detection capabilities and thorough activity tracking.