Fartlek: Interval Run Timer
by Axis SA
· Health & Fitness
· Free
On the App Store since October 2025
· Data updated
Fartlek: Interval Run Timer is made and published by Axis SA. AppBrain is an independent app data site and isn't affiliated with Axis SA. The app name, icon, screenshots and description belong to Axis SA and are shown as published on the App Store.
AppBrain's verdict
- Last updated
- October 16, 2026
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Releases
Updates seen on the App Store- Version
- 2.3.2
- Launched
- October 2025
No changelog data
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Technology
Found in the app by AppBrain- Price
- Free
- App size
- 29.0 MB
- Content rating
- Everyone
Technologies used by Fartlek: Interval Run Timer
About the app and developer
About Fartlek: Interval Run Timer
Fartlek: Interval Run Timer is a health & fitness app developed by Axis SA.
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The app has no ratings yet.
App Information
Fartlek: Interval Run Timer is freely available from the App Store. The app size is 29.05 MB. The latest version available is 2.3.2. The last update was on October 16, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since October 2025.
Developer information for Axis SA
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Store listing
By Axis SA, from the App Store
Screenshots by Axis SA, from the the App Store listing
Description by Axis SA Written by the developer, not by AppBrain. Click to read.
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/
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/