Comparison

Crucible Fit vs Stark

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

Head to head
About

Crucible Fit

Features
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A real test, every day, wherever you train. Crucible Fit gives you one authored functional fitness workout a day, sized to how you slept and the equipment you own. Work the stations, hold on through the Crux between them, and finish with your time, your splits and a mark that never expires. Once a week, run the ranked Crucible for your division. Then send your time to someone who thinks they can beat it. Your first Crucible is on us: the whole session, nothing trimmed. MOST TRAINING NEVER GETS TESTED Random workouts leave no standard and no record, so you never really know whether you are getting better. The events that do test you come a few times a year, with a ticket and a travel day. Crucible brings the test to you: at home, in a hotel room or at the gym. WHAT A CRUCIBLE IS - Stations: a rep target at each. Break as often as you need; the target is the total. - The Crux: between every station, instead of rest, a short timed hold, carry or crawl on a clock you did not start. It is what makes a Crucible harder than a circuit. - The finish: your time, where it went, and a mark that says you finished to standard. 150 Crucibles, each in bodyweight, dumbbell and kettlebell versions. 15 to 90 minutes. Graded I to V: start where you can finish, earn the harder ones. HARD ON THE RIGHT DAYS Connect Apple Health and Crucible reads your sleep, HRV, resting heart rate and training load, then picks today's Crucible to match. Hard days are spaced out on purpose. Your rep target rises when you finish comfortably and steps back the same day a session falls apart. If today turns against you, tap Too much? to cut what is left. It still counts. An optional morning brief names today's Crucible and why. NOTHING TO THINK ABOUT BUT THE WORK - A voice that calls the work and nothing else. - Your music stays at full volume, dipping only while a cue is spoken. - Bank reps in chunks. Breaks are expected and counted. - Pace against your best: you hear when you are ahead, never when you are behind. - Apple Watch mirrors every station and the Crux countdown. Bank reps with the Digital Crown. FINISH IT. KEEP THE MARK. Your receipt shows station time against Crux time, every Crux effort, your breaks and your next target. A mark does not drop when you sleep badly, and it never expires. Firsts, like every station unbroken or a Grade cleared, are named once, when they happen. ONE RANKED CRUCIBLE A WEEK Each week has a Crucible for your equipment division, so you are measured against people with the same kit. Run it as written any day that week and your time enters the field. Your fastest time stands. A ranked time needs heart rate from any device that records to Apple Health, or an observer's code. Alone with no sensor? The mark still counts in your own record. Ranked weeks in a row build a streak. SEND IT TO SOMEONE WHO THINKS THEY CAN BEAT IT Share your finish as one clean image with a link that opens the same Crucible. You see exactly what goes out, and nothing else leaves your phone. PROGRAMS When you want the road mapped: Ground Up, Iron Ladder, Full Distance and The Long Campaign. Six to twelve weeks, every day a Crucible, step-down weeks built in. TRAIN YOUR WAY ON THE OTHER DAYS More than 5,000 movements with video, a planner, saved workouts, and circuits, EMOM, AMRAP, supersets and pyramids. History, personal records and a strength index show the work adding up. A YEAR FROM NOW, YOU WILL KNOW Marks that do not expire. A streak of ranked weeks. A number that is yours, and a friend still chasing it. SUBSCRIPTION After your first Crucible, one subscription covers everything, billed monthly or annually. Payment is charged to your Apple ID and renews automatically unless cancelled at least 24 hours before the period ends. Manage it in your App Store account settings. Terms: https://cruciblefit.com/terms Privacy: https://cruciblefit.com/privacy Crucible is not a medical service. Train within your limits.

About

Stark

Features
Read full description

Stark. Workout Tracker Stark is a simple and powerful workout tracker built for lifters who want structure, consistency, and real progress. No ads. No account required. No subscription. Start training instantly. Track workouts, log sets and reps, and follow your progress over time without distractions. Create custom workout routines for push, pull, legs, full body, or your own split. Log every set and rep with ease and keep your training consistent. Progressive overload tracking See your training volume increase over time. View full workout history, track personal records, and monitor strength progression clearly. Streak tracker Stay consistent with a streak system that keeps you accountable. Miss a week and it resets. Keep going and build momentum. Quickly calculate how to load the bar. Enter your target weight and get the exact plates needed instantly. Automatic rest timer starts after each set. Stay on track with countdown alerts so you never lose focus between sets. Exercise library and workout log Access your full exercise library, log weights, track progress per movement, and review your lifting history anytime. Fast, minimal interface designed for training sessions. Works in dark or light mode depending on your environment. Stark is free to download and requires no account or subscription. Just open and start lifting. FEATURES Workout Templates โ€” Build reusable routines for any split and launch them in one tap. Set & Rep Logging โ€” Log every set with weight and reps as you train, in real time. Rest Timer โ€” Auto-starts after each set with a visual countdown and "Get Ready" alert. Plate Calculator โ€” Enter your target weight and instantly see which plates to load. Exercise Library โ€” Browse a full exercise database with per-exercise history and personal records. Session History โ€” Review every past workout with full set-by-set detail. Weekly Report โ€” Get a clear summary of your training each week, including volume, progress, and consistency. Training Streaks โ€” Stay accountable with a streak that resets if you skip a week. Progress Charts โ€” Visualize strength gains and volume trends across time. Exercise Swaps โ€” Quickly swap exercises mid-workout if equipment is taken or you want a change. Dark & Light Mode โ€” Full support for both โ€” looks sharp either way. No ads. No subscriptions. โ€” Free to download, nothing locked away. Fully functional offline!

Screenshots

Crucible Fit4 screens
Stark4 screens

Verdict

The call

The clearest difference is in-app purchases: Stark at none against Crucible Fit's 2. Stark also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support 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. Crucible Fit sells 2 in-app purchases, starting at $14.99 per month. Stark asks for nothing beyond the download.

UpkeepUpdate frequency

Crucible Fit ships an update weekly, Stark every 10 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

Scorecard2 real differences ยท 4 level
Crucible Fit versus Stark: the parameters behind the verdict, then further details
ParameterCrucible FitStark
PriceFreeFree
Update frequencyWeekly โ€” betterEvery 10 days
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.015.0 โ€” better
Further details โ€” not scored
Size177 MB50 MB
Age rating12+4+
DeveloperCrucible Fit, LLCAnton Larsson

In-app purchases

2 purchases

Crucible Fit

Subscriptions2
  • Crucible Monthly7 Days trial$14.991 Month
  • Crucible Yearly14 Days trial$119.991 Year
None

Stark

No in-app purchases

Questions

Is Crucible Fit free?
Crucible Fit is free to download, with in-app purchases available.
Is Stark free?
Stark is free to download, with no in-app purchases.
Do Crucible Fit or Stark have ads?
Neither Crucible Fit nor Stark shows ads.
Which is updated more often, Crucible Fit or Stark?
Crucible Fit ships an update weekly, and Stark every 10 days. Most recently, Crucible Fit was updated on October 24, 2026 and Stark on October 28, 2026.

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