Fartlek: AI Running Intervals

Your AI running coach. Custom-made runs and personalized training plans — HIIT, fartlek, tempo, hills — built around your goal in seconds.

Screenshot a workout. Describe it in a sentence. Or grab one from the library — and it's ready to run in seconds, warm-up to cooldown.

New: AI training plans that grow with you. Set a goal, and every run you finish shapes the next one.

50+ 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.

A PLAN THAT GROWS WITH YOU Tell your coach the goal — your first 5K, a faster 10K — and get a personalized training plan. Finish a run and the plan adapts: what comes next is always built on what you just did.

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

Open Run: Free running with manual laps 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/