By Owen PalmerUpdated November 2026
Fartlek is one of the simplest ways to build speed without setting up a track or a stopwatch-heavy schedule. You alternate faster efforts with easy running, and the rhythm is driven by feel and by landmarks. A free fartlek training app can help you structure those surges, call out the switch from easy to hard, and keep a log so you can see progress. The picks below were selected through research: we looked at the features each app’s listing describes, the type of runner it seems built for, and the kinds of feedback owners commonly report. Nothing here reflects personal testing, and you should check current features and terms before you download.
Our top picks at a glance
- 1
TOP CHOICEBest overallApp Group Running TrackerView on Amazon - 2
TOP CHOICEBest for general fitness mixfitness and bodybuilding appView on Amazon - 3
TOP CHOICEBest for walkers easing into speedWalking for weight loss appView on Amazon - 4
Best for tracking across workoutsFitness Tracker & Workout AppView on Amazon - 5
Best budget pickFitness AppView on Amazon
Our Top Picks
Before the detailed reviews, here is a side-by-side view. Fartlek is unstructured by design, so the most useful feature in any app is the ability to cue effort changes without forcing you to watch a screen. Look for audio prompts, simple interval timers, and a clean log.
Quick Comparison
| Product | Best for | Key feature |
|---|---|---|
| App Group Running Tracker | Runners who want route and pace logging | Run tracking with split-style data |
| fitness and bodybuilding app | Runners who also lift and cross-train | Workout logging beyond running |
| Walking for weight loss app | Walkers building toward light running | Walk and run session guidance |
| Fitness Tracker & Workout App | Multi-sport training logs | Activity history and workout tracking |
| Fitness App | Runners who want a simple starting point | Basic workout tracking |
App Group Running Tracker
App Group Running Tracker
Best for: Runners who want to log outdoor runs and review how each session went.
This is a running-focused tracker, which makes it a natural fit for fartlek sessions where you want a record of distance, time and pace shifts. Runners who prefer to plan their own surges and review them afterward tend to get the most from this type of app.
Key specs
- Running-focused activity tracking
- Session history for comparing weeks
- Free to download as listed on the store page
Pros
- Keeps running logs organized in one place
- Useful for seeing whether fast segments are getting faster over time
- Simple enough to use mid-training block
Cons
- Fartlek cueing may require you to rely on your own pace judgment
- Interval-specific structure is less prominent than in dedicated timer apps
Bottom line: A strong choice for runners who mostly want tracking and reflection rather than guided interval prompts.
fitness and bodybuilding app
fitness and bodybuilding app
Best for: Runners who combine speed work with strength training.
Fartlek builds aerobic power and leg speed, and many runners pair it with lifting. An app built around general fitness and bodybuilding can organize both halves of the week in a single log.
Key specs
- Workout logging for strength and cardio
- Exercise library and routine planning
Pros
- Good for tracking strength work alongside running
- Routine structure helps keep a training week balanced
- Familiar format for gym-focused users
Cons
- Running-specific features such as pace splits may be limited
- Can feel busy if you only want fartlek prompts
Bottom line: Best for hybrid athletes who want one app covering lifting and speed play.
Walking for weight loss app
Walking for weight loss app
Best for: Walkers who are building up to running and want gentle speed variation.
Fartlek does not have to start fast. A walk-run structure can be the first step, and this type of app often includes interval guidance that mirrors the alternation of effort fartlek requires.
Key specs
- Walk and run interval guidance
- Progress tracking over several weeks
Pros
- Gentle entry point for beginners
- Clear cues for switching between effort levels
- Encourages consistency over time
Cons
- Built for weight loss goals, so speed-focused runners may find it too basic
- Fewer options for advanced pace targets
Bottom line: A sensible pick for newer runners who want to add surges gradually.
Fitness Tracker & Workout App
Fitness Tracker & Workout App
Best for: Athletes who want one place to record runs, rides and gym sessions.
If your fartlek sessions are one part of a broader plan, a multi-activity tracker keeps your data together and makes it easier to spot patterns in load and recovery.
Key specs
- Multi-activity workout tracking
- Activity history across sports
Pros
- Consolidates training data from different activities
- Useful for seeing total weekly volume
- Flexible for cross-training blocks
Cons
- Not specialized for fartlek cueing
- Some features may sit behind paid tiers, so check the store listing before committing
Bottom line: Good for multi-sport athletes who value a single training log.
Fitness App
Fitness App
Best for: Beginners who want a simple, low-commitment starting point.
A general fitness app can be enough to begin fartlek. You do not need advanced metrics to alternate between a comfortable jog and a faster stretch of your choosing.
Key specs
- General workout tracking
- Simple session logging
Pros
- Easy to learn in a few minutes
- Minimal clutter for focused sessions
- Good entry point before moving to specialized tools
Cons
- Limited running-specific analysis
- May lack advanced interval customization
Bottom line: A practical first download for runners new to speed play.
Buying Guide
Choosing a free fartlek training app comes down to a few practical factors. The list below covers what to check before you commit your training to any single tool.
1. Interval or cueing support
Fartlek is loose by design, so you want an app that can prompt you without demanding constant screen checks. Audio cues, vibration alerts and simple timers all help. Some apps offer structured interval templates that you can adapt to a fartlek feel by choosing your own surge lengths.
Good picks for this: App Group Running Tracker, Fitness App
2. Logging and history
Fartlek progress shows up over weeks, not single sessions. An app that stores your runs and lets you compare them makes it easier to see whether your faster segments are getting quicker or your recovery is improving.
Good picks for this: Fitness Tracker & Workout App, App Group Running Tracker
3. Pace versus effort
Beginners often do better working by effort (breathing, perceived exertion) than by strict pace. Check whether the app lets you run without a rigid pace target. Apps that show pace will be useful for runners who want data, but you should still learn to read your own effort.
Good picks for this: App Group Running Tracker, Walking for weight loss app
4. Cross-training fit
If you lift, cycle or do mobility work, consider whether your running app should also handle those sessions. A single log can make it easier to manage total load across the week.
Good picks for this: fitness and bodybuilding app, Fitness Tracker & Workout App
5. Ease of use during a run
Fartlek happens on roads, trails and parks. Large text, one-tap controls and clear audio are more useful than dense dashboards. Test the basic start, pause and stop functions before your first session.
Good picks for this: Fitness App, Walking for weight loss app
6. Privacy and data handling
Running apps often use location and health data. Read the privacy policy and permission requests. Only grant access that the app genuinely needs for the features you plan to use.
Good picks for this: Fitness App, App Group Running Tracker
7. Level of experience
A beginner needs guidance and a gentle start. An experienced runner may want pace targets and custom session building. Match the app’s complexity to where you are now, and plan to upgrade later if your training outgrows it.
Good picks for this: Walking for weight loss app, Fitness Tracker & Workout App
FAQ
Is there a truly free fartlek training app?
Many running and fitness apps offer a free tier that includes basic interval or session tools. Some features may be locked behind subscriptions, so check the store listing for what is included without payment before you rely on any one app.
Do I need a GPS watch to do fartlek with an app?
No. Fartlek can be done by feel, with time-based cues or with landmarks. A phone app with audio prompts is enough for most runners. A watch adds convenience, especially for pace data.
How long should a fartlek session be?
Many runners use 20 to 40 minutes, including a warm-up and cool-down. Beginners may keep surges short, around 30 seconds to 1 minute, with several minutes of easy running between them. Adjust based on your current fitness.
How often should I do fartlek?
Once or twice a week is common for most recreational runners, with easy days in between. If you are new to speed work, start with one session and build gradually. Consult a coach or healthcare professional if you have injuries, heart concerns or other health questions.
Can I use a fartlek app for walking?
Yes. Walk-run structures can be a good starting point. Choose an app that supports interval cues and clear effort changes, and build gradually before adding faster surges.
Is fartlek the same as interval training?
They are related but not identical. Fartlek is unstructured speed play where you vary effort by feel, while interval training usually follows fixed distances or times. Many apps support both styles.
Should I track pace or effort?
Both have value. Pace gives objective data, while effort helps you adapt to heat, fatigue and terrain. Many runners use pace for review and effort for the run itself.
Conclusion
The right free fartlek training app depends on what you want from it. If you want detailed running records, App Group Running Tracker is a sensible starting point. If you cross-train, the fitness and bodybuilding app or the multi-activity tracker can keep everything in one log. Newer runners may prefer the walk-run style guidance of the walking app, while the general Fitness App offers a simple first step. Pick one, run a few fartlek sessions, and reassess after a month.
Sources
- Physical activity guidelines and recommended weekly exercise levels for adults (cdc.gov)
- Exercise prescription principles, including interval and training intensity guidance (acsm.org)
- Research summaries on physical activity, fitness and health outcomes (nih.gov)
Related reading
- Who Introduced Fartlek Training Method? The Swedish Origin Story
- Who Developed the Fartlek Training Method Was Developed By? Origins Explained
- What Is the Difference Between Fartlek and Interval Training (2026): Which Should You Choose?
- What Is a Fartlek Training Session? Pace Structure and Examples
- What Is Fartlek Training, Also Known as Speed Play? A Runner's Guide
- What Components of Fitness Does Fartlek Training Improve? (2026 Guide)
About Owen Palmer
Owen Palmer is part of our editorial team and reviews and edits our speed & interval running guides, checking product details against manufacturer specifications and owner feedback.
