Privacy Policy

Last updated: 9 September 2026

This policy explains what Sauntle collects, why, and your choices.

Who we are

Sauntle is an independent movement-analysis project, reachable at gaitai.athle@gmail.com. This policy covers the Sauntle website and app at sauntle.com.

What we collect and why

• Videos you upload or record. Your clip is processed to run the analysis. What happens to it afterwards depends on whether you are signed in.
  • Signed in. Your clip is saved to your account and kept alongside your results, so we can check that the analysis was accurate and keep improving it. This is a condition of holding an account rather than a box you tick: there is no way to run an analysis on an account without the clip being saved. You can ask us to delete any clip, or your whole account, at any time.
  • Not signed in. We keep your clip for up to 30 days so we can check the analysis is accurate, then delete it. You can stop that: the upload screen has a checkbox marked "Don't save my clip", and if you tick it your clip is deleted from the server as soon as your results are ready. The checkbox starts unticked, so if you do nothing your clip is kept.
  Saved clips are private, are reviewed only by us, and are never sold or shared. We use them to check and improve the accuracy of the analysis.
• Account information (optional). If you create an account, we store your email address and a securely hashed password so we can save your analysis results and show your history. You can use Sauntle as a guest without an account.
• Saved results (for signed-in users). The numeric results and findings from your analyses are stored to your account so you can revisit them and see your trends over time.
• Analysis records. We keep the numbers each analysis produces (measurements, findings and recording-quality flags) so we can monitor and improve accuracy. If you were not signed in and ticked "Don't save my clip", this record is anonymous: it is not linked to any account, IP address or file name, and it contains no video.
• How the analysis was recorded. Alongside each analysis we store technical details about the recording and the device that made it: the make of operating system and browser (for example "iOS / Safari", never the full identifying browser string), whether it was a phone, whether you recorded in the app or uploaded a file, and each clip's resolution, frame rate and length. Camera quality varies enormously between phones, so this is how we tell a genuine movement problem from a limitation of the device that filmed it. If you were not signed in and ticked "Don't save my clip", we additionally discard your screen size, time zone and language, so this record cannot be traced back to you.
• Optional survey answers. After an analysis we may invite you to answer a few questions about your body and training: age range, sex at birth, height, weight, how much you run, your usual surface, and what shoes you were wearing. It is entirely optional, every question can be skipped, and declining changes nothing about your results. We ask because these are what let us read your movement against the right reference range rather than a generic one. We do not ask about pain, injuries, or medical history. If you are signed in, your answers are saved to your account, reused for later scans, and you can view or delete them at any time from the Survey button above your past analyses. If you tell us you are under 18, we discard the whole response and store nothing.
• Signing in with Google (optional). If you choose "Continue with Google", Google tells us your email address, whether Google has confirmed it, and a unique identifier for your Google account. We store those to recognise you next time. We never receive your Google password, and we ask Google for nothing else — no contacts, no calendar, no profile browsing. Using Google to sign in also means Google knows you use Sauntle. You can create an account with an email and password instead, and nothing about the service differs if you do.
• Confirming your email. When you create an account we email you a one-time link to confirm the address is yours. It is optional: your account works whether or not you use it. Confirming matters mainly for security — it is what lets us safely connect a Google sign-in to an account that already exists, without risking connecting it to the wrong person.
• Essential cookies. A session cookie keeps you signed in. It is required for accounts to work and is not used for advertising.
• Analytics. We use Google Analytics to understand how the site is used (pages viewed, device and browser type, approximate location from IP, and general usage patterns). Google sets its own cookies and processes this data as described in Google's privacy policy.
• Server logs. Like most sites, our host records standard technical data (IP address, user agent, timestamps) for security and reliability.

Third parties

• Google — web fonts, Google Analytics (usage measurement), and Google Sign-In if you choose to use it.
• YouTube (Google) — exercise videos are embedded from YouTube. When you play one, YouTube may set cookies under its own privacy policy.
• Cloudflare — DNS and network security in front of the site.
• Hosting provider — runs the server that processes analyses.

We do not sell your personal information.

We do not ask for, and do not want, information about your health, injuries or medical history.

Data retention

Clips from visitors who are not signed in are deleted automatically within 30 days. Clips saved to an account are kept for as long as you keep the account, so that we can measure whether the analysis is becoming more accurate over time; they may also be removed earlier if we need the storage space. If you were not signed in and ticked "Don't save my clip", your video is deleted as soon as the analysis finishes.

Account data and saved results are kept until you ask us to delete them or delete your account. To request deletion of your account, or of any clip you uploaded, email gaitai.athle@gmail.com.

Your choices and rights

• Use Sauntle as a guest, without creating an account.
• Run an analysis with no video stored at all: use Sauntle signed out, and tick "Don't save my clip" before you analyse.
• Skip the optional survey entirely, or, if you are signed in, delete your answers at any time from the Survey button above your past analyses. Survey answers given as a guest are anonymous and not linked to you, so there is nothing for us to look up and remove.
• Request access to, or deletion of, your account data or any clip you uploaded, by email.
• Opt out of Google Analytics with Google's browser add-on, or by blocking cookies in your browser.

Children

Sauntle is not directed to children and is intended for a general adult audience.

Changes

We may update this policy; material changes will be reflected by the "last updated" date above. Questions? Email gaitai.athle@gmail.com.