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Best Fartlek Interval Trainer Apps

250+ iOS apps curated and reviewed

4.8 avg rating
20 free apps
Updated September 2026

Out of 250+ fartlek interval trainer apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Fartlek Interval Trainer Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Fartlek Interval TrainerFartlek Interval TrainerFree—NoYesSep 2026
2Interval: RunnerInterval: RunnerFree—NoNoMay 2026
3RUN interval - Running TimerRUN interval - Running TimerFree4.7★ (1K)NoYesSep 2026
4Interval Timer □ HIIT TimerInterval Timer □ HIIT TimerFree4.8★ (86K)NoYesSep 2026
5Intervals Pro: HIIT TimerIntervals Pro: HIIT TimerFree4.8★ (14K)NoYesSep 2026
6Core Advantage Interval TimerCore Advantage Interval TimerFree5.0★ (4)NoNoAug 2026
7Seconds Interval TimerSeconds Interval TimerFree4.7★ (24K)NoYesSep 2026
8Fartlek: AI Running IntervalsFartlek: AI Running IntervalsFree—NoYesJul 2026

Top Picks for Fartlek Interval Trainer

Fartlek Interval Trainer#1

Fartlek Interval Trainer by Richard English

Get insights into your workout
Editor's Choice
💪 Health & Fitness
0.0(0 ratings)
FreeIn-App Purchases
Fartlek Interval Trainer screenshot 1
Fartlek Interval Trainer screenshot 2
Fartlek Interval Trainer screenshot 3
Fartlek Interval Trainer screenshot 4
Fartlek Interval Trainer screenshot 5
Fartlek Interval Trainer screenshot 6

This running app automatically detects spontaneous intervals during Fartlek runs, providing live color-coded feedback on your effort. It also functions as a powerful timer for structured workouts like HIIT and Tabata, offering detailed metrics and syncing with Strava and Apple Health.

RUN interval - Running Timer#3

RUN interval - Running Timer by CAN YOU HEAR ME SOFTWARE

Interval running made easier.
Worth Considering
💪 Health & Fitness
4.7(1K ratings)
FreeIn-App Purchases
RUN interval - Running Timer screenshot 1
RUN interval - Running Timer screenshot 2
RUN interval - Running Timer screenshot 3
RUN interval - Running Timer screenshot 4
RUN interval - Running Timer screenshot 5
RUN interval - Running Timer screenshot 6

This app simplifies interval and Fartlek running by allowing you to set custom targets for time or distance during hard, easy, and rest efforts. It offers detailed post-run summaries, audio and visual feedback, and an Apple Watch app for enhanced training.

More Fartlek Interval Trainer apps to explore

FAQ about Fartlek Interval Trainer

Are there free fartlek interval trainer apps for iPhone?
Yes — 20 of the top fartlek interval trainer apps we rank are free to download, including Fartlek Interval Trainer and Interval: Runner.
Fartlek Interval Trainer has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 250+ fartlek interval trainer apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Fartlek Interval Trainer is a running app designed to automatically detect spontaneous intervals during Fartlek runs and provide structured workout timing for HIIT and Tabata. It offers live feedback and detailed metrics.
Fartlek Interval Trainer is available for both iPhone and Apple Watch, allowing for seamless tracking and training on your preferred devices.