Comparison

Stark Stretch vs Caden

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

Head to head
About

Stark Stretch

Access a library of 83 HD video exercises for a full-body workout. Create personalized routines with timers for Tabata, HIIT, and circuit training. Track progress by saving workouts and burned calories to Apple Health.

Highlights
  • 83 HD exercise videos
  • Personalized workout creation
  • Full body workouts
  • Step-by-step workout guidance
  • Tabata, HIIT, Circuit timers
  • Muscle group targeting
  • Apple Health integration
Features
Read full description

Optimise your results with Stark Stretch! - Be inspired by 83 exercises presented in sharp HD video. - Create your own personal workout. - Get a full body workout with exercises in all ranges of difficulty - While working out, follow the step by step workout-feature which take you through the workout using timers and your chosen specifics. - The timers support different workout types including Tabata, HIIT and Circuit training. - Find exercises targeting specific muscle groups. Integration with Apple Health: Save burned calories and performed workouts. Exercises are performed by, Denice Lundevall

About

Caden

Analyze your running form with just your phone's video. Get a detailed score, cadence, and personalized tips to improve your stride. Build a custom exercise plan to enhance your running efficiency and track your progress over time.

Highlights
  • Video gait analysis
  • Running form score
  • Cadence and foot strike detection
  • AI-powered coaching tips
  • Customizable exercise plans
  • Progress tracking with charts
  • Stride phase visualization
Features
Read full description

Caden checks your running form from a short phone video. Film 3 to 10 seconds of yourself running side-on. Caden gives you a form score out of 100, your cadence, and a clear list of what to fix. It is gait analysis without the lab visit. No sensors, no watch, only your iPhone. WHAT CADEN MEASURES Caden grades seven parts of your running form from the side view: • Where your foot lands compared with your hip • Knee bend on landing • Knee bend while landed • Bounce, meaning how much your hips rise and fall • Knee bend at push-off • Upper body lean • Head position You also get your cadence in steps per minute and your foot strike type: heel, midfoot or forefoot. On high frame rate clips, Caden also estimates your ground contact time. SEE EVERY PHASE OF YOUR STRIDE The Breakpoints view freezes your run at foot strike, midstance and toe-off. Each frame puts a skeleton overlay on your body and shows the numbers for that phase. Watch your clip with the overlay, without it, or as the original upload. Tap any segment to see what Caden saw and why it matters. You also get how to fix it, a coach tip, your measurement against the ideal range, and the research behind it. AN AI RUNNING COACH THAT READS YOUR RESULTS If you allow it, Caden sends your measurements and up to three frames to an AI coach. It writes you a short, plain-language note about your running technique. A PLAN BUILT FROM YOUR WEAKEST SCORES Tap Build my exercise plan to get a 4 or 8 week program. You do three short sessions a week, about 15 to 20 minutes each. Sessions mix running drills like A-marches and quick-feet strides with strength, balance, core and mobility work. Think calf raises, glute bridges and split squats. TRACK YOUR PROGRESS Film again after a few weeks. The Stats tab shows your form score over time and a chart for each metric. Before and after puts your newest run next to your first one. WHO IT IS FOR • New runners who want to learn good running form early • 5K, 10K, half marathon and marathon runners who want a more efficient stride • Runners who overstride, land hard on their heels, or bounce too much • Treadmill runners. Film from the side. HOW TO FILM Turn your phone sideways and prop it at hip height. Run across the frame with your whole body in view, head to feet. Good light helps. Caden records at 120 fps when your phone supports it. If a clip is too dark, too short, or the runner is too small, Caden tells you instead of guessing. GOOD TO KNOW • It measures in 2D from video. It is not a medical device and does not diagnose injuries. If you have pain, see a physio or doctor. • Caden stores your clip privately under your account and removes the audio. You can delete any analysis, or your whole account, in Settings. PRICING Caden is free to download. You can open a full example analysis on the Home screen. To analyze your own runs you need Caden Pro, a weekly or yearly auto-renewing subscription. The app shows the price before you buy. Apple charges your Apple ID account. The subscription renews unless you turn it off at least 24 hours before the current period ends. Manage or cancel it in your App Store account settings. Terms of Use: https://caden-web.pages.dev/terms/ Privacy Policy: https://caden-web.pages.dev/privacy/

Screenshots

Stark Stretch4 screens
Caden4 screens

Verdict

The call

The clearest difference is price: Caden at Free against Stark Stretch's $1.99. Caden also leads on rating (5.0 vs 4.6) and update cadence (every 9 days vs every 2 months). Stark Stretch's advantage is in-app purchases (none vs 2) and ratings volume (168 vs 3). On ads there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Caden is free to download; Stark Stretch costs $1.99 up front. Caden sells 2 in-app purchases, starting at $6.99 per 7 days. Stark Stretch asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Caden holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Stark Stretch has 168 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 71% of Stark Stretch's written reviews are positive against 100% of Caden's.

UpkeepUpdate frequency

Stark Stretch ships an update every 2 months, Caden every 9 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard9 real differences · 1 level
Stark Stretch versus Caden: the parameters behind the verdict, then further details
ParameterStark StretchCaden
Price$1.99Free — better
Rating4.6 (168 ratings)5.0 (3 ratings) — better
Positive reviews70.7% of reviews100.0% of reviews — better
Number of ratings168 — better3
Update frequencyEvery 2 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better17.0
Further details — not scored
Size57 MB52 MB
Age rating4+4+
DeveloperPostra ABAeron Horne

Customer experience

Stark Stretch

All ratings168 ratings
Positive91.1%
Neutral3.0%
Negative6.0%
Written reviews140 reviews
Positive70.7%
Neutral7.9%
Negative21.4%

Caden

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Stark Stretch

Reported bugs

7 issues
  • Videos won't download
  • App crashes or won't work
  • Server issues for downloads
  • Analysis mode transmits data without consent
  • Timer/rest period settings are cumbersome
Show 2 more
  • Voice countdown stopped working
  • Program creation doesn't display exercises

Requested features

13 requests
  • Add more detailed instructions (text or voice)
  • Improve video clarity and motion
  • Automatic handling of left/right side exercises
  • Expand exercise library
  • Add option to add custom stretches
Show 8 more
  • Add voice countdown/timer warnings
  • Include breathing guidance
  • Add alternative exercises for injuries
  • Add yoga edition
  • Add soothing music
  • More pre-made workout programs
  • Highlight muscles being worked
  • Add animation showing where to feel the stretch

Caden

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Stark Stretch

No in-app purchases

2 purchases

Caden

Subscriptions2
  • Caden Pro$6.997 Days
  • Caden Pro$49.991 Year

Questions

Is Stark Stretch free?
Stark Stretch costs $1.99, with no in-app purchases.
Is Caden free?
Caden is free to download, with in-app purchases available.
Which has better reviews, Stark Stretch or Caden?
Caden is rated higher. Stark Stretch averages 4.6 out of 5 from 168 ratings, while Caden averages 5.0 from 3 ratings.
Do Stark Stretch or Caden have ads?
Neither Stark Stretch nor Caden shows ads.
Which is updated more often, Stark Stretch or Caden?
Stark Stretch ships an update every 2 months, and Caden every 9 days. Most recently, Stark Stretch was updated on October 25, 2026 and Caden on October 24, 2026.

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