Running form analysis app for iPhone

See how you run. Then fix it.

Film a 5 to 20 second clip. Caden maps your stride, scores six parts of your form, freezes the frames that matter, and builds a practice plan around what it finds. No lab. No coach. No treadmill needed.

  • Audio removed, clip kept private
  • Side view, outdoors or on a treadmill
  • Plan built from your own results
Caden running practice plan screen showing weekly drill, balance and posture sessions
Caden running form analysis result: form score 72, cadence 168 steps per minute, scores for foot landing, knee bend, upper body lean, arm bend and head position
6 metricsFoot landing, knee bend, lean, arm bend, head
3 breakpointsFoot strike, midstance, toe-off
Practice planDrills, strength, balance, mobility
Before and afterRe-film and compare to baseline
Built from real complaints

Most form apps tell you what is wrong. Caden tells you what to do about it.

We read over a thousand one and two star reviews of running form and video analysis apps. The same complaints came up again and again: the verdict looked wrong and there was no way to check it, the exercises were generic, the upload sat at zero percent, and the paywall came before the first analysis. Caden was built to answer those four.

  • See the frame, not just the label. Every metric points at an annotated freeze frame so you can check the verdict with your own eyes.
  • One cue per metric. Not a biomechanics lecture. A single thing to think about on your next run.
  • A plan, not a PDF. Three short sessions a week for 4 or 8 weeks, built from your lowest scores and your time budget.
  • Real progress, not a stuck bar. The upload shows each stage, and a failed run is removed instead of parked.
  • Honest about limits. Caden rejects clips it cannot read instead of inventing a score.
  • Try it before you pay. Download is free, and the price is on the screen before any purchase.
Get Caden for iPhone
Caden breakpoint view at foot strike with skeleton overlay showing the landing ankle ahead of the hip
Screenshots

What you get after one clip

Caden home screen with the Run a new analysis button and past scans
Home: one button, your past scans.
Caden frame your run guide: phone sideways at hip height, run across the frame, whole body in view
A framing guide for the side view.
Caden analysis screen with form score and six metric dials
Form score and six dials.
Caden toe-off breakpoint frame with skeleton overlay
Freeze frames at each phase.
Caden exercises tab showing a practice plan with weekly sessions
A plan you can follow.
Caden stats tab showing form score rising from 55 to 72 over four weeks
Watch the score move.
How it works

Four steps. About two minutes.

  1. 1

    Set up the shot

    Side view only: prop the phone sideways at hip height, or hand it to a friend. Works outdoors and on a treadmill.

  2. 2

    Film or import a clip

    5 to 20 seconds, running past at your normal easy pace with your whole body in frame. The framing guide shows you where to stand.

  3. 3

    Read the score

    The clip uploads with the audio removed and comes back as a form score out of 100, six metric dials, and annotated frames at foot strike, midstance and toe-off. Each metric has one cue and a plain-language note.

  4. 4

    Follow the plan, re-film

    Caden builds a 4 or 8 week plan from your lowest scores, three short sessions a week. At the end you film again and see the before and after side by side.

FAQ

Straight answers

Each answer links to a longer page if you want the detail.

How does Caden analyze my running form from a phone video?

You film a 5 to 20 second clip from the side, outdoors or on a treadmill. The app removes the audio and uploads the clip to your account, where pose estimation scores where your foot lands, knee bend on landing and at push-off, upper body lean, arm bend and head position. It also counts cadence in steps per minute.

Learn more

Do I need a treadmill or a gait lab?

No. Most people film outdoors on a flat path with a friend or a phone propped at hip height. Treadmill works too and is often easier to frame. A gait lab uses force plates and 3D markers, which Caden does not replace, but for form coaching a 2D side view catches the big issues.

Learn more

What is a good running form score?

Caden scores out of 100. 85 or above is excellent, 75 to 84 is good, 60 to 74 is fair, and below 60 needs work. The score is a coaching signal, not a medical grade, and it only compares like with like: same view, same direction, same analysis version, and a similar pace.

Learn more

How do I know if I am overstriding?

Film from the side and freeze the frame at foot strike. If your ankle lands well ahead of your hip with a straight knee, you are overstriding. Caden marks this frame for you and measures the landing reach as a fraction of leg length.

Learn more

Does Caden tell me how to fix what it finds, or just what is wrong?

Both. Each metric comes with one cue you can use on your next run, and the app builds a 4 or 8 week practice plan of drills, strength, balance and mobility sessions around your lowest scores. At the end you re-film and compare against your baseline.

Learn more

Is Caden accurate?

It measures 2D joint angles from video, so it is accurate for what a side view can see: landing reach, knee flexion, torso lean, arm angle and cadence. It cannot measure force or 3D rotation. Caden tells you when a clip is too dark, too far away or too short to trust, instead of guessing.

Learn more

How is Caden different from Ochy?

Ochy is a lab-style biomechanics report used by coaches and clinics. Caden is a consumer coach. It keeps the report to six plain-language metrics, shows you the frames each verdict is based on, and turns the result into a plan you can follow that week.

Learn more

Is my video stored?

Yes, privately. The audio is removed, then the clip uploads to storage that only your account can reach. It stays there until you delete the analysis, which removes the clip, the frames and the measurements from our servers.

Learn more
Questions

What runners ask Google

All questions
Comparisons

Thinking about another app?

All comparisons

Your next run could be the one you fix

Download Caden, film one clip, and get a score and a plan before your shoes are back on the rack.

Download on the App Store Free to try. iOS 17 or later.