Fartlek Interval Trainer vs Sprint Intervals

Build the interval workout you want. Stay on target while you train. Then learn from every session. FiT is an interval timer and training companion for runners on Apple Watch and iPhone. Create classic intervals, HIIT and Tabata workouts—or run freely with automatic Fartlek interval detection. CREATE WORKOUTS YOUR WAY Build simple work-and-rest sessions or advanced workouts with warm-ups, cooldowns, repeated sets and multiple effort levels. FiT makes even complex sessions clear and easy to follow. STAY ON TARGET Color-coded feedback shows whether you’re on pace. Spoken coaching, audio and haptic alerts help you respond without constantly checking your device—and spoken cues automatically match your chosen language. The Dual Progress Ring shows both your current interval and your overall workout progress at a glance. FARTLEK WITHOUT THE BUTTONS Switch to Fartlek mode and run by feel. FiT detects changes in your speed and automatically converts them into recorded intervals. No reaching for your device. No tapping between efforts. Just run. LEARN FROM EVERY WORKOUT See how each interval performed with detailed pace, heart rate, cadence and distance metrics. Compare workouts to understand how your performance changes over time. Personalized coaching insights use your workout data to highlight meaningful patterns and offer practical recommendations for future sessions. ADVANCED EFFORT TRACKING Advanced workouts can distinguish between sprint, hard, moderate and easy efforts, helping you create more varied sessions and analyze every effort afterwards. APPLE WATCH, IPHONE AND YOUR FITNESS APPS Train in your chosen language on Apple Watch or iPhone. Create and edit interval workouts directly on your watch, with controls for inserting, reordering and deleting interval groups. Save completed workouts to Apple Health and sync your sessions with Strava. KEY FEATURES • Flexible interval timer for running, HIIT and Tabata • Automatic Fartlek interval detection • Dual-ring live workout progress • Color-coded pace and effort feedback • Localized spoken coaching, plus audio and haptic alerts • Create and edit interval workouts on Apple Watch • Detailed pace, heart rate, cadence and distance metrics • Performance tracking for every interval • Workout comparisons and personalized insights • Sprint, hard, moderate and easy effort levels • Apple Health and Strava integration • Light and dark appearance Run free. Train smart. Learn from every session. SUBSCRIPTION TERMS FiT offers an optional auto-renewable subscription. Payment will be charged to your Apple ID account at confirmation of purchase. The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel your subscription at any time in your Apple ID account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.iubenda.com/privacy-policy/39192677

Sprint Intervals is a precision interval timer built for athletes, coaches, and anyone who trains with purpose. Design complex interval sequences in seconds with our drag-and-drop timer builder — then let the app guide you through every rep, every set, every second. Stop settling for rigid, one-size-fits-all timers. Sprint Intervals lets you build exactly the workout you want — then guides you through it hands-free. CREATE YOUR PERFECT TIMER Drag, drop, and reorder interval blocks to design any routine. Assign custom categories like Work, Rest, or Cardio — each with its own color and icon. Use repeat groups to build complex sessions in seconds. Save your favorites and start them with one tap. HANDS-FREE VOICE COACHING Never look at your phone mid-set. Voice announcements call out every transition, set number, and interval name so you stay focused. Countdown beeps warn you before each switch. Mute everything instantly when you need silence. SEE YOUR PROGRESS Dive into session insights with interactive charts. View workout minutes by day, week, month, or year. Filter by category to see exactly where your time goes. Every session is saved with a full interval-by-interval breakdown. DESIGNED FOR YOUR WORKOUT • Dynamic progress ring with interval markers • Live Activity on Lock Screen and Dynamic Island • Floating timer bar so you never lose your place • Confetti celebration when you finish • Fully accessible with VoiceOver support