Privacy
The short version: your video never leaves your phone, and neither does anything we measure from it. There are no accounts, no cookies and no ads.
Last updated November 6, 2026
Your video
When you choose a video, your browser reads it frame by frame on your own phone or computer. It is never uploaded, never stored, and never seen by anyone, including us. When you close the page, it is gone.
Your measurements and coaching
The joint angles and timings are measured on your device too. The coaching is worked out on your device from a fixed set of rules, so nothing about your shot, swing, serve or rep is sent anywhere.
On the basketball and baseball pages, your last result is saved in your own browser, not on our server, so your next check can show what improved. Clearing your browser's data for this site removes it.
What our server sees
- Standard server logs. Like every website, our hosting company keeps routine logs of requests (such as your IP address, browser type and the pages loaded) to keep the site secure and running.
- A simple usage count. The basketball page adds one to a daily total when an analysis finishes, and when someone taps "Read it to me". It is just a number per day. Nothing about you or your video is in it.
Other services the page loads
To track your body, the page downloads tracking software from jsDelivr and Google, and it loads its fonts from Google Fonts. Your browser fetches these like any other website file, so those companies receive a normal request (such as your IP address). They never receive your video or your measurements.
A testing mode
The site owner sometimes uses a special testing link to compare coaching methods. Only in that mode are the measured numbers (never the video) sent to an AI service and saved for review. Opening the site normally never does this.
No accounts, cookies, ads or tracking
You never sign up, and we never ask for your name, age or email. We do not use cookies, advertising, or analytics that follow you around the web. If that ever changes, this page will change first.
For parents
Form Analyzer is built with young athletes in mind, which is why it collects nothing about them. Please supervise filming, and only film your own child or someone who has agreed to it.
Not medical advice
The coaching is general practice advice, not medical, coaching or training advice. The fitness check shows what the camera saw and never clears anyone to add weight. If anything hurts, stop and see a doctor or physiotherapist.