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Privacy policy.

We read your stride, not your life.

Draft, to be reviewed by counsel. Not legal advice. Version 0.3, 13 October 2026.

A runner with a backpack crossing wide stairs, the whole frame streaked by motion

In plain words.

What we keep, why, and for how long. An orange tick means you can delete it yourself.

What we collect, why, how long we keep it, and whether you can delete it yourself
What we collectWhyHow longYou can delete it
Email and nameYour account and receiptsWhile your account exists
Runner profileMatching shoes to youWhile your account exists
Aches you shareTailoring your shoe picks, only with your explicit consentUntil you withdraw consent or delete your account
Your running video10 seconds, from behindReading your stride, nothing elseWith us: deleted once sent for analysis. With our analysis provider: under its own retention policy
Still images of youShowing you in your report30 days
Stride readings and reportYour fitting reportWhile your account exists
ReceiptsAccounting lawAs long as accounting law requires
Card numberTaking payment, by StripeNever stored by us
CookiesYour country, staying signed in, counting visitsSee the cookie policy
How you use the siteCounting visits and improving the fitting, with Google AnalyticsCookies: 2 years. See the cookie policy
Legs and grey running shoes striking a road beside an orange painted line

Ten seconds of your back. Never published.

  • 30days for the still image we keep, then deleted
  • 0copies of your video kept by us once it is sent
  • 0brands or shops see it

The full text.

1. Who is responsible

Strideprint is run by Alexis Maresca, entrepreneur individuel (EI), trading as Beluga, SIREN 893 369 918, SIRET 893 369 918 00014, Rennes, France. Alexis Maresca is the data controller.

2. What we collect

Your account, your runner profile, the aches you choose to share (health information, only with your consent), your video and its stride readings, and payment status from Stripe. No face needed. To measure visits, Google Analytics collects a cookie ID, the pages you view and the fitting steps you reach.

3. Why we use it

Contract for your fitting. Your explicit consent for your video and for any aches you share. Legal obligation for receipts. Consent for the newsletter, if you subscribe.

4. Your video

One job: reading your stride. We send it to our technical analysis provider, which analyses it for us. Never published, never sent to brands or shops.

5. Who sees it

No selling. Only processors that run the service: Supabase (database and storage, EU, Ireland), Vercel (hosting), Stripe (payments), Reloop (emails), Google (Google Analytics, audience measurement) and our technical analysis provider (video analysis and shoe recommendation).

6. International transfers

Some processors may handle data outside the EU. Google Analytics data may be transferred to the United States. Our analysis provider stores files on Google Cloud. The safeguards for each transfer are being confirmed before launch.

7. How long we keep it

Video, with us: deleted as soon as it has been sent for analysis, and within about a day if it never is. We never copy the annotated video. Video, with our analysis provider: kept under its own retention policy; we can’t promise you a duration yet. Still images: 30 days. Aches: until you withdraw consent. Account and reports: until you delete your account. Google Analytics cookies: 2 years. Receipts: as the law requires.

8. Your rights

See, fix, erase, take away, say no, complain. Each one is explained below.

9. Security

Encrypted connections, private storage reached through short-lived links, and access limited to the people who need it.

10. Children

Minors need a parent or guardian to set up and supervise the account.

11. Contact

One address for every privacy question, at the end of this page.

12. Changes

If something important changes, we email you before it applies.

On this page
  1. 1. Who is responsible
  2. 4. Your video
  3. 8. Your rights
  4. 11. Contact

1Who is responsible

Strideprint is run by Alexis Maresca, entrepreneur individuel (EI), trading as Beluga, SIREN 893 369 918, SIRET 893 369 918 00014, Rennes, France. Alexis Maresca is the data controller, who decides what is collected and why.

2What we collect

Only what a fitting needs: your account (email, name if you give it, language, country), your runner profile answers (height and weight are optional), the aches you choose to share, your video and the stride readings taken from it, and payment status from Stripe. Aches are health information: we keep and use them only with your explicit consent, which you can withdraw in Settings, Privacy. No face needed: filming from behind is enough. To measure visits, Google Analytics also collects a cookie ID, the pages you view, your clicks and scrolling, and the steps of the fitting you reach. It does not store your IP address.

3Why we use it, and on what basis

  • Contract: running your fitting and delivering your report.
  • Your explicit consent: sending your video for analysis, asked before it is sent, and using any aches you share, asked on that screen.
  • Legal obligation: keeping receipts.
  • Consent: the newsletter, if you subscribe, withdrawn in one click.

4Your video

It has one job: letting the analysis read your stride. We send it to our technical analysis provider, which analyses it for us. Along with it go your optional height and weight, your running habits and, if you agreed, your aches. Never your name or your email. We never publish your video and never send it to brands or shops. Its whole life, in four steps.

5Who sees it

We do not sell your data. Only the processors that run the service see it: Supabase (database and file storage, EU, Ireland), Vercel (site hosting), Stripe (payments), Reloop (emails, such as sign-in links), Google Ireland Limited and Google LLC (Google Analytics, audience measurement: cookie ID, pages viewed, fitting steps) and our technical analysis provider (video analysis and shoe recommendation). We don’t pass your data to brands or shops.

6International transfers

Your account and reports are stored in the EU (Supabase, Ireland). Some processors may handle data outside the EU: Vercel, Stripe and Google are US companies, Google Analytics data may be transferred to the United States, and our analysis provider stores files on Google Cloud. The legal safeguards for each of these transfers are being confirmed before launch.

7How long we keep it

Video, with us: deleted as soon as it has been sent for analysis, and within about a day if it never is. We never copy the annotated video. Video, with our analysis provider: kept under its own retention policy, on its Google Cloud storage; we can’t promise you a duration yet. Still images of you: 30 days. Aches: until you withdraw consent. Account and reports: until you delete your account. Google Analytics cookies: 2 years. Receipts: as long as accounting law requires.

8Your rights

See, fix, erase, take away, say no, complain. How to use each one.

9Security

Encrypted connections, private storage reached only through short-lived links, and access limited to the people who need it.

10Children

Minors need a parent or guardian to set up and supervise the account.

11Contact

One address for every privacy question. It is at the end of this page.

12Changes to this policy

If something important changes, we tell you before it applies.

The life of your video.

With us, your video only passes through: it is deleted once sent for analysis. Our analysis provider keeps its copy under its own policy. One still image stays 30 days, your report until you delete your account.

Your video
Deleted right after analysis
One still image
30 days
Your report
Until you delete your account
  1. You say yes, then upload.

    Nothing leaves your phone before that. We ask for your explicit consent before your video is sent for analysis.

  2. It passes through our EU storage.

    It lands in our private storage in the EU (Supabase, Ireland), then goes to our technical analysis provider.

  3. Our provider reads your stride.

    It analyses the video on its side, where files are stored on Google Cloud, and returns measurements, an annotated video and a still image. We keep the measurements for your report and copy the still image, kept 30 days. The annotated video is never copied to us: your report shows it from our provider through a link valid one hour, as long as the provider still has it.

  4. What stays, and where.

    With us, the video is deleted as soon as it has been sent. With our provider, it is kept under its own retention policy: we can’t promise you a duration yet. Write to us to ask for its deletion.

Your data, your call.

Most of these take a few taps in Settings. For the rest, and for what our providers hold, write to us: we answer within one month.

  • See it

    A copy of everything we hold about you.

    Settings, Privacy, Download my data
  • Fix it

    Your name, email or runner profile.

    Settings, Account and Runner profile
  • Erase it

    Your videos and images, your aches, or your whole account.

    Settings, Privacy
  • Take it

    Your data in a JSON file another service can read.

    In Download my data
  • Say no

    To emails, to using your aches, or to any processing.

    Settings, or write to us
  • Complain

    Not happy with our answer? Your supervisory authority can help.

    In France, the CNIL

A question about your data?

Write to a person, not a form. Give us the email on your account, nothing more.

support@strideprint.run
  • Data controller: Alexis Maresca
  • By post: Alexis Maresca (Beluga), Rennes, France. Full address published before launch.
  • We reply within one month at most.