Privacy Policy
Zuletzt aktualisiert: 20 July 2026
This policy explains what data PrepDaF collects, what we do with it, and what you can ask us to do about it.
PrepDaF is run by PrepDaF LLC, Newark, Delaware, United States.
1. We are independent
PrepDaF is not affiliated with, endorsed by, or connected to telc gGmbH, the Goethe-Institut or the TestDaF-Institut. We prepare you for their exams. We do not represent them and we do not issue their certificates.
2. What we collect, and how long we keep it
- Your account: your email address and name, plus what you tell us when setting up — target exam, your level, your exam date, and how much time you want to study each day. Kept while your account exists, and deleted when you ask us to delete it.
- Your work: written answers, placement test results, the scores and feedback we generate, and how long tasks took you. Kept with your account, and deleted along with it.
- Your voice: recordings and live microphone audio from speaking practice. Kept only while we process them — a recording is deleted automatically once its feedback has been generated, and never becomes part of your account history.
- Technical data: IP address, browser and device details, sign-in and language cookies, and local storage for your theme setting and placement test progress. Cookies and local storage last as long as our Cookie Policy describes; anything that appears in server logs is kept short-term, for security and troubleshooting.
3. What we do with it
We use your data to run the service, generate your feedback, build your study plan, keep your account secure, and — only if you asked for it — send you marketing email.
Two things we do not do: we do not sell your data, and we do not use your texts, essays or recordings to train AI models.
4. Who else handles it
We share data only with the service providers we need to run PrepDaF, and only under data processing agreements:
| Type of provider | What they do | What they receive |
|---|---|---|
| AI processing | Grades your writing and powers live speaking practice | Your written answers and voice audio |
| Sign-in provider | Lets you sign in with an account you already have | Your name and email |
| Email delivery | Sends the emails we owe you | Your email address and the message |
| Web hosting | Serves the website and the dashboard to your browser | Your IP address and request details, in server logs |
| Cloud database and file storage | Stores your account and your work, and runs the part of PrepDaF that generates feedback | Account data, your progress, voice recordings while they are processed, system logs |
We do not sell or share your data with anyone else, and none of these providers may use it for their own purposes. If you want to know which companies these are, ask us at contact@prepdaf.com and we will tell you.
The servers that deliver the website and the dashboard are located in Germany, so your visits and the logs they produce stay inside the EU.
The remaining providers are based outside the European Economic Area, so the data they handle may be processed there. Every such transfer is covered by the safeguards EU law requires: either an EU decision that the country protects data to an equivalent standard, or the European Commission's standard data protection contract signed by the provider.
5. Children
PrepDaF is not for anyone under 16 — or older, if your country sets a higher age for digital consent. We cannot verify age, and in anonymous practice sessions we cannot check it at all.
If your child has used PrepDaF without your consent, email contact@prepdaf.com and we will delete the account and the data.
6. Your rights
If the GDPR applies to you, you can ask us to show you your data, correct it, delete it, send you a copy, or stop processing it. You can also complain to your national data protection authority.
Write to contact@prepdaf.com. We will answer within one month.
7. Contact
PrepDaF LLC
Newark, Delaware, United States
Email: contact@prepdaf.com