Kinovea alternative for iPhone
Kinovea is free, precise and Windows only, with no mobile port planned. What to use on an iPhone instead, for manual angle tools or an automatic verdict.
Kinovea does not run on an iPhone, and its developers have said no mobile port is planned. If you want Kinovea's manual angle and line tools on iOS, the closest apps are Onform and CoachView. If you want the joint angles measured for you, with a verdict and a plan, use Caden. It films on the phone, tracks the joints automatically, and needs no desktop at all. The trade is control for speed. Kinovea lets you place every marker yourself. Caden places them for you and tells you what they mean.
What Kinovea does well
Kinovea is free and open source. It has been the default answer to "free Coach's Eye alternative" for years, and for good reason.
It is precise. You can step frame by frame, place points on joints, draw angles, measure distances against a known scale, track a point over time, and compare two clips side by side with synchronised playback. Biomechanics students and coaches who want to measure a knee angle to the degree use it every day. There is no subscription, no upload, no account. Your video stays on your machine.
For a coach who works from a Windows laptop at the side of the track, Kinovea is hard to beat on price and depth. Nothing on this page is better at manual measurement.
Where people get stuck
The problems are the platform and the stability, not the tools.
No phone, no Mac. Kinovea is a Windows desktop program. A third-party guide puts it plainly:
"There is no mobile port of Kinovea, and none is planned" Third-party Kinovea guide
That means a workflow of film on the phone, transfer to a laptop, open in Kinovea, measure by hand. For a coach with a laptop that is fine. For a runner who wants to know today whether they overstride, it is four steps too many.
Crashes. Kinovea's own forum has a steady stream of crash reports across versions.
"Crash of Kinovea every 2 or 3 actions" Kinovea forum
"kinovea crashes when opening files or opening file tree" Kinovea forum
"Kinovea 0.9.1 crashes when you try to open the 'settings' menu" Kinovea forum
Open source projects get fixed by volunteers, so some of these are old and some are current. The point is that you cannot count on it in the moment.
No verdict. Kinovea measures what you tell it to measure. It does not know that a landing 30 percent of leg length ahead of the hip is a long reach, or that 164 steps per minute is on the low side. You bring that knowledge, or you do not get an answer. That is by design. It is a measurement tool, not a coach.
The iPhone options
Onform is the closest thing to Kinovea's manual tools on iOS. It records at 240 frames per second, steps frame by frame, draws lines and angles, and compares two clips. It is rated 4.79 from 8,616 iOS ratings. The trade-offs: it is built for coaches with invited athletes, it is a subscription, and reviewers complain about the trial and about uploads. See Onform alternatives for runners for the full picture.
CoachView is a slow-motion video player with a frame dial, rated 4.55 from 611 iOS ratings. It is simpler than Onform and cheaper. Reviewers report freezing while scrubbing and an export problem with iCloud. It is a player with drawing, not a measurement tool.
Caden takes the other road. Instead of giving you a pen, it places the joints itself. You film 5 to 20 seconds from the side, the audio is removed, and the clip uploads to private storage under your account where pose estimation runs. You get a form score out of 100, six dials for where your foot lands, knee bend on landing, knee bend at push-off, upper body lean, arm bend and head position, and cadence. Three freeze frames at foot strike, midstance and toe-off show the skeleton overlay so you can see where each marker landed. A coach's tip gives one cue per metric. You can start a 4 or 8 week plan built from your lowest scores.
What Caden does not do: let you place or move markers, draw lines, measure an arbitrary angle, or track a point you pick. If the auto tracking cannot read a clip because it is too dark or the runner is too small, Caden rejects it and tells you why, rather than guessing.
Comparison table
| Kinovea | Onform | CoachView | Caden | |
|---|---|---|---|---|
| Runs on | Windows desktop | iPhone, weaker Android | iOS, Android | iPhone, iOS 17 or later |
| Cost | Free, open source | Subscription | Paid | Free download, Pro subscription |
| Manual angle and line tools | Yes, the best here | Yes | Yes, drawing | No |
| Automatic joint tracking | No | No | No | Yes |
| Frame by frame | Yes | Yes, 240 fps | Yes, frame dial | Three fixed breakpoints |
| Verdict and cue | No | No, from your coach | No | Yes, one cue per metric |
| Plan | No | No | No | 4 or 8 weeks, 3 sessions a week |
| Video leaves the device | No | Cloud upload | Depends on export | Yes, private storage until you delete it |
Who should pick which
- You are a student, researcher or coach who needs exact angles and has a Windows laptop: Kinovea.
- You coach from an iPhone and want manual tools plus athlete chat: Onform.
- You want a cheap slow-motion player on your phone to eyeball your stride: CoachView.
- You are a runner who wants to know what to fix without learning biomechanics: Caden.
- You want both: measure in Caden for the verdict, then pull the same clip into Kinovea if you want to check an angle by hand.
How to switch or try
You do not need to give up Kinovea. The same phone clip works everywhere. Film at hip height, from the side, whole body in frame, 10 to 20 seconds. See what angle to film running form.
Run that clip through Caden first. It is free to download. If the verdict is enough, you are done. If you want to check a number yourself, AirDrop the clip to a Windows machine and open it in Kinovea. The two will not agree to the degree, because Caden estimates joints from 2D video and Kinovea uses the points you place. They should agree on the story.
How to do it in Caden
- Tap Run a new analysis. Film 10 to 20 seconds from the side at your easy pace.
- Read the form score and the six dials. Tap the lowest dial for its cue.
- Open Breakpoints. The Foot strike frame shows the skeleton overlay, so you can see where the tracking put each joint.
- Read the coach's tip.
- Start a 4 or 8 week plan from the result.
- Re-film at the end of the plan and open Before and after in Stats.
FAQ
Is there a Kinovea app for iPhone?
No. Kinovea runs on Windows desktop only. There is no iOS or Android version and the project has said none is planned.
Does Kinovea work on a Mac?
Not natively. Some users run it through a Windows virtual machine or a compatibility layer. That is a project in itself and not something this page can vouch for.
Is Caden as accurate as Kinovea?
Different methods. Kinovea reports the angle between points you place, so it is as exact as your clicks. Caden estimates joints automatically from 2D video and can be off by a few degrees on any single frame. Caden is for a repeatable verdict. Kinovea is for a precise one-off measurement. See how accurate are running form apps.
Can I draw angles in Caden?
No. Caden has no drawing or manual measurement tools. It shows the angles it measured on the breakpoint frames.
What is the best free Kinovea alternative on iPhone?
There is no free app that matches Kinovea's manual tools on iPhone. Caden is free to download. The full analysis and plan need the Pro subscription.
Kinovea, Onform and CoachView are names that belong to their owners.