Fartlek vs OnTrack Interval Timer

Tell your AI coach your goal and the days you can run, and get a training plan that adapts every week to how your runs go. Need a single workout? Describe it or paste a screenshot, and it's ready in seconds. Then just run: voice and haptic cues guide every interval, even with your screen off. 25 workouts runners actually love — HIIT, fartlek, tempo, hills, Yasso 800s. On iPhone and Apple Watch. Because running the same pace every day only makes you better at running the same pace. Break the plateau. EVERY RUN IS A NEW CHALLENGE Every workout here has a specific goal and a different feel — so you actually train different muscles, systems, and skills instead of just logging miles. Your running workout is fun now :) Speed: 200m pops, ladders, strides, sprint finishers Strength: Hill repeats, power builders, switchbacks Stamina: HIIT, Cruise intervals, tempo waves, Yasso 800s Endurance: Progressive aerobic, negative splits, scenic cruises Fun: Fartlek games, stoplight play, music flow runs Each workout has a warm-up, main set, and cooldown — with clear effort guidance through every phase. AI WORKOUT GENERATOR Tell the AI coach what you want — "30 minutes, hill repeats, moderate" or "a fartlek that doesn't bore me" — and get a runnable workout in seconds. Paste a screenshot of a workout you saw online and we'll convert it into intervals. TRAIN BY EFFORT, NOT NUMBERS Every interval shows a target effort (80% for work, 30% for recovery). No heart rate monitor needed. GPS pace lies anyway — effort just works better. AUTO-LAP BY DISTANCE OR TIME Distance intervals auto-complete when you hit 200m, 400m, 800m, or whatever target you set. Time intervals count down with precision. No fumbling with lap buttons mid-stride. AUDIO & HAPTIC CUES Get notified at interval start, halfway, and end. Works with your screen off, works on Apple Watch. Built for running outside, where you can't keep glancing at a screen. APPLE WATCH COMPANION Run straight from your wrist. Leave your phone behind for track sessions — the Watch app handles everything on its own. CLEAN, GET-OUT-OF-THE-WAY DESIGN Big, glove-friendly controls. Dark mode. One-screen run view with your current interval front and center, and what's next right there too. AFTER YOUR RUN Review every completed interval — distance, time, pace. Auto-syncs to Apple Health. WORKOUT TYPES Tempo: Sustained-effort training Intervals: Structured speed work Fartlek: Mixed-pace playful running Hills: Uphill repeat sessions Long Run: Extended endurance efforts 3 DURATION OPTIONS Quick (10–15 min): Short, sharp sessions Standard (20–35 min): Complete workouts Long (40–60+ min): Extended training WHO IT'S FOR - Runners looking to improve their times - Runners who like variety and fun - Amateur athletes who want to gain leg strength and power - Anyone looking to improve overall fitness and health - Anyone looking to lose weight with HIIT (High-Intensity Interval Training) - Anyone who wants to run intervals without 10 minutes of setup - Anyone tired of complex running apps that feel more like Instagram No social feeds. No data mining. Just running. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Run your track intervals by ear. OnTrack is an audio-first interval timer for track runners. Set your reps, rests, and target pace — then put your phone away. OnTrack beeps you through every rep, every recovery, and every checkpoint, so your eyes stay on the track instead of your screen. No subscription. No ads. No account. Premium is a single one-time purchase. HEAR EVERY REP • Countdown beeps before every phase change, and a clear cue when it switches • Distance checkpoint cues inside each rep — every 100m, 200m, or 400m, timed from your target pace • Works alongside your music BUILT FOR THE TRACK • Warm-up, main set, and cool-down in a single preset • Repeat blocks for sessions like 8×1000m with 400m recovery • Set each phase by time, pace, or distance • Pace checkpoint table: see your split at every 100m before you start GLANCEABLE WHEN YOU DO LOOK • A full-screen color for every phase — warm-up, interval, rest, cool-down • A huge timer with high-contrast text that stays readable in bright sunlight • Hold-to-pause and hold-to-stop, so a bump in your pocket never ends your session PRIVATE BY DESIGN • No GPS, no sign-up, no account • Your presets and workout summaries are stored on your device • No ads and no analytics tracking your training FREE AND PREMIUM Free: build and run complete workouts with every block type while the app is open. Premium (one-time purchase): keep the workout running — with every audio cue — when the screen is off or the app is in the background. PERFECT FOR • Track repeats like 8×400m, 6×800m, or 5×1000m • Tempo and goal-pace sessions • Runners who want a dedicated, distraction-free audio pacer alongside their watch GET STARTED 1. Create a preset: warm-up, main set, cool-down 2. Check your pace checkpoints 3. Hit start, pocket your phone, and run by ear