Comparison

Fartlek vs BlockStep

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Fartlek

Features
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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 โ€” 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 โ€” 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 โ€” with clear effort guidance through every phase. AI WORKOUT GENERATOR Tell the AI coach what you want โ€” "30 minutes, hill repeats, moderate" or "a fartlek that doesn't bore me" โ€” 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 โ€” 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 โ€” 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 โ€” 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 (10โ€“15 min): Short, sharp sessions Standard (20โ€“35 min): Complete workouts Long (40โ€“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/

About

BlockStep

Features
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BlockStep turns walking into building. Every step you take lays one block. Reach your daily Goal and the day's structure is complete; fall short and you keep exactly what you built โ€” the scaffolding stays where you stopped, honestly. A NEW STRUCTURE EVERY DAY Ninety-one authored pieces across thirteen chapters โ€” a cottage, a lighthouse, a locomotive, a hot air balloon, a kraken. Everyone walks the same order from their own first day, so what you meet on day four is a decision somebody made, not an accident of the calendar. YOUR GOAL, YOUR RESOLUTION Set it anywhere from 500 to 30,000 steps. The same structure is built at whatever detail your Goal implies โ€” a modest Goal makes a bolder, chunkier object; an ambitious one makes a finer, more detailed one. Nobody is building a worse version of anything. KEEP GOING A Streak counts the days you finished. Crown a structure by walking 150% of your Goal and you bank a Shield, which quietly saves a day you missed. Ill, or away? Mark the day โ€” your Streak holds where it is, and never pretends you walked. EXTRA STEPS GO SOMEWHERE Walked past your Goal? Point the overflow at an unfinished day from your Collection and finish that one too. The record keeps both truths: what you walked that day, and that a later day completed it. WHERE YOU LEFT IT Every past day is in your Collection: scroll it, open one, and turn it in your hand. Twenty Badges mark what the walking has earned โ€” firsts, streaks, hours, whole chapters โ€” and none of them can be un-earned. ON YOUR WRIST AND YOUR HOME SCREEN The watch app counts your steps on its own. The widget shows today's structure as it goes up. Walk mode puts it on your Lock Screen while you are out. IT FOLLOWS YOU Your Collection travels between your own devices through your own iCloud, so a new phone starts where the old one stopped. There is no account to make and nothing to sign in to. FREE, AND THE KIT The first fourteen Steps of the Sequence are free โ€” enough to see whether this is for you. After that the road begins again, and the Kit is a single $4.99 purchase that opens all ninety-one Builds and everything after them. No subscription, no ads, no second currency. Your walking counts either way: the Kit changes what gets built, never what gets recorded. PRIVACY BlockStep reads exactly one thing โ€” your step count โ€” and there is no server of ours for it to go to. No account, no analytics, no advertising, no tracking. Your Collection is mirrored into your own private iCloud database, which is yours: it lives in your Apple account and we have no key to it. A device that is not signed in to iCloud simply keeps its Collection locally.

Screenshots

Fartlek4 screens
BlockStep4 screens

Verdict

The call

The clearest difference is iOS requirement: Fartlek at 18.5 against BlockStep's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Fartlek sells 2 in-app purchases, starting at $4.99 per month and BlockStep sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 19, 2026 and October 15, 2026 respectively.

Scorecard1 real difference ยท 5 level
Fartlek versus BlockStep: the parameters behind the verdict, then further details
ParameterFartlekBlockStep
PriceFreeFree
Update frequencyEvery 4 daysEvery 4 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, Apple WatchiPhone, Apple Watch
Requires iOS18.5 โ€” better26.0
Further details โ€” not scored
Size29 MB17 MB
Age rating4+4+
DeveloperAxis SACaffeinated Code d.o.o.

In-app purchases

2 purchases

Fartlek

Subscriptions2
  • Monthly plan$4.991 Month
  • Yearly Premium$29.991 Year
1 purchases

BlockStep

One-time1
  • The Kit$4.99

Questions

Is Fartlek free?
Fartlek is free to download, with in-app purchases available.
Is BlockStep free?
BlockStep is free to download, with in-app purchases available.
Do Fartlek or BlockStep have ads?
Neither Fartlek nor BlockStep shows ads.
Which is updated more often, Fartlek or BlockStep?
Fartlek ships an update every 4 days, and BlockStep every 4 days. Most recently, Fartlek was updated on October 19, 2026 and BlockStep on October 15, 2026.

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