Privacy Policy

Last updated: 13 October 2026

App: Doctor Yaad (“the App”)

Data controller: YSA Medical Services (eenmanszaak), the business that runs Doctor Yaad, KvK 88159396, Valkreek 52, 3079 AN Rotterdam, The Netherlands.

Privacy contact: yaad@doctoryaad.com

This Privacy Policy explains what personal data the App collects, why, the legal basis for processing it, who we share it with, how long we keep it, and the rights you have. It also covers what happens when you buy a Founding membership on this website. We are based in the Netherlands, so the EU General Data Protection Regulation (GDPR) applies, and this policy is written around it.

This policy is published at https://doctoryaad.com/privacy and is linked inside the App under Settings → Legal.

1. Who we are

The App is a calisthenics training tool with an adaptive AI coach. Doctor Yaad is run by YSA Medical Services (eenmanszaak), KvK 88159396, Valkreek 52, 3079 AN Rotterdam, The Netherlands, which is the data controller responsible for your personal data. If you have any question about this policy or your data, contact us at yaad@doctoryaad.com.

2. What data we collect

We only collect what we need to run the App and provide coaching. We do not sell your data.

a) Account data: your email address (the only login identifier). We use passwordless sign-in: you log in with a one-time code / magic link sent to your email. We never collect or store a password.

b) Athlete profile: the information you give us to personalise training:

c) Training data: generated as you use the App:

d) Technical data: crash reports, error logs, and diagnostic information (via Sentry, see Section 5) so we can fix bugs and keep the App stable.

e) Founding membership data: when you buy a Founding membership on doctoryaad.com.

We keep a small record of each Founding member (our “founder ledger”) so we know who has a spot, can send your TestFlight invite, and can take away app access when a membership ends.

f) Website analytics and marketing, only if you accept cookies: the first time you visit doctoryaad.com a banner asks whether you accept analytics and marketing cookies. Your choice (accept or decline) is saved in your own browser. Only if you accept do we load Google Analytics (which pages you visit and how you use the site, plus a sign-up event when you join the waitlist) and the Meta Pixel(page views and a sign-up event when you join the waitlist, so we can measure and reach the right people with our content on Meta’s platforms). Both set their own cookies and receive technical data such as your IP address, browser and device. If you decline, or ignore the banner, neither is loaded and nothing is sent to Google or Meta. To change your choice, clear this site’s data in your browser and the banner will ask again. The App itself contains neither.

Sensitive / health-adjacent data. Pain reports, soreness, recovery and body-metric data describe your physical state and are sensitive. We treat them with extra care, process them only to provide the training and pain-management features you ask for, and rely on your explicit consent for them (see Section 4). You can withdraw that consent at any time by deleting your account (Section 8).

3. Why we collect it (purposes)

PurposeData used
Create and secure your account, log you inEmail
Generate and adapt your training programAthlete profile, training data, check-ins, pain reports
Power the AI coach chat and personalised guidanceCoach-chat messages + a context “packet” of your relevant training data (see Section 5)
Track and respond to pain/soreness over timePain reports, soreness, check-ins
Keep the App stable and fix crashesTechnical / crash data
Deliver app updatesBuild + update delivery (via Expo/EAS, Section 5)
Take payment for a Founding membership and manage or cancel itFounding membership data (via Stripe, Section 5)
Give you access to the App through TestFlight, and remove it when your membership endsYour name and email (shared with Apple, Section 5)
Send you emails you asked for: your welcome email, a link to manage your membership, and waitlist updates if you joined the waitlistYour name and email (via Resend, Section 5)
Let you into the private Founders Discord, and remove you when your membership endsYour Discord user ID and Founder role (via Discord, Section 5)
Keep track of who has a Founding spotFounding membership data (in our founder ledger, hosted by Neon)
Understand how the website is used and measure our marketing, only if you accept cookiesWebsite usage and technical data (via Google Analytics and the Meta Pixel, Section 2f)

We do not use your App data (your profile, training, check-ins, pain reports or coach chats) for advertising or profiling unrelated to training, and the App runs no ad-tracking. The only advertising-related tool we use is the Meta Pixel on the website, and only if you accept cookies (Section 2f).

4. Legal basis (GDPR Article 6 and 9)

5. Who we share data with (sub-processors)

We use a small number of trusted service providers (“sub-processors”) to run the App. Each only receives the data needed for its function, and each is bound by a data processing agreement.

Sub-processorWhat it doesWhat it receives
SupabaseAuthentication and Postgres database hostingYour email and all account, profile, and training data stored in the database
RailwayBackend / engine hostingTraining and account data passing through the backend during processing
OpenRouterRoutes every AI coach conversation to the model hosts belowYour chat messages plus a context “packet” of your relevant training data (see below), passed through to one of the model hosts
DeepInfraRuns the AI model that answers coach conversationsThe same chat messages and context packet, so the model can write a coaching reply
CoreWeave and TogetherBackup hosts for the same AI model, used only when DeepInfra cannot answer at that momentThe same chat messages and context packet, for that conversation only
SentryCrash and error reportingTechnical/diagnostic data and error logs, tagged with a pseudonymous device identifier (see below)
Expo / EASApp builds and over-the-air updatesData needed to deliver app builds and over-the-air updates to your device
Apple (TestFlight)Delivers the App to Founding members during the betaThe email you bought with (and your first name), which we send to Apple so Apple can email you the TestFlight invite. When your membership ends we remove you from the Founding test group
Stripe (Link)Sells the Founding membership to you through Link as merchant of record: takes the payment, handles VAT, receipts and billing, and manages your membershipYour name, email address, billing address and payment details. Your card details go straight to Stripe; we never see or store your card number
ResendSends our emailsYour name and email address and the content of the email (welcome, membership link, waitlist updates)
VercelHosts this website, including checkout and the membership pagesTechnical request data (such as IP address and browser) and anything you submit through the website, while it is processed
NeonDatabase for our founder ledgerFounding membership data (Section 2e)
Google (Google Analytics)Website analytics, only after you accept cookiesPages you visit, how you use the site, a waitlist sign-up event, and technical data such as IP address, browser and device
Meta (Meta Pixel)Measuring and targeting our marketing on Meta’s platforms, only after you accept cookiesPage views, a waitlist sign-up event, and technical data such as IP address, browser and device
DiscordThe private community server for Founding members. You join by connecting your Discord account, and we remove you automatically when your membership endsWhen you connect: your Discord user ID (we store it with your founder record) and your membership of the server and its Founder role. Discord also receives everything you post in the server and the account details you gave Discord

About crash reporting (Sentry). Before any crash report leaves your device, we scrub the free text you typed: chat messages and pain notes are redacted on-device, so diagnostic data does not contain what you wrote. Crash reports are tagged with a pseudonymous device identifier: a random ID stored only on your device, never derived from or linked to your account, which automatically regenerates every 30 days so old reports stop correlating to your device on their own.

About the AI coach specifically. When you chat with the coach, the App sends your message and a packet of your training context to an AI model so it can answer with awareness of your training. Every coach conversation goes through OpenRouter to an open model (DeepSeek) that runs at DeepInfra. When DeepInfra cannot answer at that moment, the same model answers at CoreWeave or Together instead. All of them are based in the United States. Every request names those three as the only hosts allowed to answer it and asks for zero data retention: OpenRouter is told not to store your data, and only a host that does not store your messages or the replies may serve it. If none of them can answer, the request is not sent anywhere else.

As a general precaution, do not share information in the coach chat that you would not want sent to these providers for processing.

We may also disclose data where required by law, or to protect our rights, users, or the public.

6. Where your data is stored and international transfers

Your account and training database (Supabase) is hosted in the European Union (Ireland). Where each sub-processor stores or processes your data:

Sub-processorLocation
Supabase (database + authentication)European Union (Ireland)
Railway (backend engine)European Union (Amsterdam)
OpenRouter (AI coach routing)United States
DeepInfra (AI coach model host)United States
CoreWeave (backup AI coach model host)United States
Together (backup AI coach model host)United States
Sentry (crash reporting)European Union (Germany), Sentry’s EU data region, provided by Functional Software, Inc. in the United States
Expo / EAS (app updates)United States
Apple (TestFlight)European Union (Ireland), provided to EU users by Apple Distribution International Ltd, together with Apple Inc. in the United States
Stripe (payments)European Union (Ireland), Stripe Technology Europe Ltd, with transfers to Stripe, Inc. in the United States
Resend (email)United States (us-east-1)
Vercel (website hosting)European Union (Germany, Frankfurt) for the site’s server functions, including checkout. Pages are delivered through Vercel’s global edge network. Vercel Inc. is based in the United States
Neon (founder ledger)European Union (Germany, Frankfurt)
Discord (founders community)United States (Discord Inc.)
Google (Google Analytics, only with consent)European Union (Ireland), Google Ireland Ltd, with transfers to Google LLC in the United States
Meta (Meta Pixel, only with consent)European Union (Ireland), Meta Platforms Ireland Ltd, with transfers to Meta Platforms, Inc. in the United States

Where data is processed outside the European Economic Area (EEA), currently by OpenRouter, DeepInfra, CoreWeave, Together, Expo / EAS, Resend, Vercel and Discord, all based in the United States, by Sentry’s US company, and by the US parent companies of Apple, Stripe, Google and Meta, we rely on appropriate safeguards, such as the EU Standard Contractual Clauses (SCCs) and, where applicable, the EU-US Data Privacy Framework.

7. How long we keep data (retention)

8. Your rights and how to use them

Under the GDPR you have the right to:

In-app account deletion. You can delete your account from within the App, in its settings, or by emailing us at yaad@doctoryaad.com. Deletion erases your personal data and your authentication account.

Other requests. To exercise access, portability, rectification, objection, restriction, or to withdraw consent, email yaad@doctoryaad.com. We will respond within one month as required by the GDPR (extendable by two further months for complex requests, with notice). We may ask you to verify your identity first.

9. Children

The App is intended for users aged 16 and over and is not directed at children under that age. (The Netherlands sets the GDPR digital-consent age at 16.) We do not knowingly collect data from anyone under the minimum age. If you believe a child has provided us data, contact yaad@doctoryaad.com and we will delete it.

10. Security

We use reasonable technical and organisational measures to protect your data, including encrypted transport, access controls at our sub-processors, on-device redaction of free text before crash reports are sent, and pseudonymous crash identifiers that expire on their own. No system is perfectly secure; we cannot guarantee absolute security.

11. Changes to this policy

We may update this policy. If we make material changes, we will notify you in the App or by email and update the effective date above. Continued use after changes take effect means you accept the updated policy.

12. Contact

Questions or requests: yaad@doctoryaad.com
Data controller: Doctor Yaad is run by YSA Medical Services (eenmanszaak), KvK 88159396, Valkreek 52, 3079 AN Rotterdam, The Netherlands.