Privacy Policy

1. Who we are

Klarweg is a German-language education brand offering self-paced online courses (levels A1 through C2, aligned to the Goethe-Zertifikat exam levels). Klarweg is operated by an individual, not a registered company, LLP, or other corporate entity. There is currently no separate publicly listed business address; all correspondence is handled by email at klarwegofficial@gmail.com.

This policy explains what information Klarweg collects when you use the site, why it's collected, and what choices you have.

2. Data we collect and why

The table below reflects exactly what the Klarweg systems store today.

Data	Why we collect it
Name	To personalise your account and greet you correctly.
Email address	To identify your account, let you sign in, and reach you about your purchases or support requests.
Phone number	Required by our payment processor, Cashfree, to create an order — collected only when you begin a purchase.
Google account identifier	If you choose "Sign in with Google," Google shares a verified email, name, and a stable account identifier with us so we can create or recognise your account. See Signing in with Google.
Password (as a salted hash)	If you sign up with email and password, we store a cryptographic hash of your password — never the password itself — to verify future logins.
Saved words and review progress	The German vocabulary you choose to save while learning, and your spaced-repetition review history for those words, so they follow your account across devices.
Purchases and course access (entitlements)	To know which levels or the Lifetime bundle you've purchased and unlock the matching content.
Order and payment identifiers	Records of each order (amount, status, Cashfree's own order/payment reference) so we can look up a purchase if you contact support. We do not store your card or UPI details — see Payments.
Pseudonymous rate-limit information	To slow down automated abuse of login and signup, we temporarily store a one-way cryptographic hash derived from your IP address and the current date — never the IP address itself in readable form.

Chapter progress (which sections you've completed, quiz scores) is stored only in your browser's local storage on your current device — it is not sent to or stored on Klarweg's servers, and does not follow you to another device.

3. Signing in with Google

If you choose "Sign in with Google," Google handles the authentication and, with your consent at that time, shares your verified email address, name, and a stable Google account identifier with Klarweg. We use this only to create or recognise your Klarweg account — we do not receive your Google password, and we do not access other Google account data such as your contacts, files, or the content of your Google account.

4. Payments (Cashfree)

Course purchases are processed by Cashfree, a third-party payment gateway. When you check out, your name, email, and phone number are shared with Cashfree to create the payment order. Your card, UPI, or other payment instrument details are entered directly with Cashfree — Klarweg's own systems never receive or store them. Klarweg stores only the resulting order record: the amount, currency, order status, and Cashfree's own order/payment reference identifiers.

Course access is granted automatically once Cashfree confirms a successful payment to our systems.

5. Cookies and local storage

Klarweg uses a single cookie, set when you log in: a session cookie that keeps you signed in. It is marked HttpOnly (not readable by page scripts) and Secure, so it is only ever sent over HTTPS. It is also marked SameSite=None, which is required because the site and the API are served from different domains — without it, your signed-in requests to the API wouldn't be authenticated. It carries no personal information itself — it is a reference our server uses to look up your logged-in session. We do not use cookies for advertising or cross-site tracking.

Separately, your browser's own local storage and IndexedDB are used for convenience and performance, entirely on your device:

• A small local profile object and your current chapter progress (both device-local, not synced to our servers).
• A visual-preference setting on the homepage (not personal data).
• Cached audio clips, so words you've already heard play back instantly without re-downloading.

None of this browser-local data is transmitted to Klarweg's servers; it stays on your device and can be cleared at any time through your browser's own settings.

6. Saved Words and account data

Saved Words and your review progress are tied to your account and stored on our servers, so they're available whenever you sign in — on any device. Only you can see your own saved words; each request is authenticated against your session and scoped to your account. You can remove an individual saved word at any time from the Saved Words page.

7. No analytics or advertising tracking

Klarweg does not currently use any analytics, advertising, or behavioural-tracking service. No third-party analytics script runs on the site as of this policy's last update.

8. Third-party services we use

Klarweg is built on the following third-party infrastructure, each of which processes some data as part of providing their service to us:

• Google — sign-in (see above) and web fonts.
• Cashfree — payment processing (see above).
• Cloudflare — our backend application and database run on Cloudflare Workers and D1, which process account, order, and saved-words data on our behalf.
• GitHub Pages — hosts the Klarweg website itself.
• jsDelivr and GitHub Pages (as a CDN) — deliver course audio clips.
• OpenAI — generates Klarweg AI feedback (see Klarweg AI feedback below).

We have chosen these providers for their security and reliability. We have not independently verified, and do not make claims about, each provider's specific internal compliance certifications beyond what they publish themselves.

Klarweg AI feedback

Klarweg AI gives feedback on German you write or say inside a chapter (for example "Check my German" in Writing, or a hint on an exercise), and answers German-learning questions you ask in the Klarweg AI chat on the homepage. It runs only when you press one of those buttons or send a question. When it is not available, the course works as normal.

• What is sent: the text you submitted (for speaking, the transcript your browser's speech recognition produced — never the audio recording), and which chapter and exercise it belongs to. For the chat, your question and the last few messages of the same conversation are sent, so the answer can follow on; the conversation is not saved in your browser or on our servers. Your name, email address, phone number and account identifier are not sent to the AI model provider.
• Who processes it: the request passes through Klarweg's own server on Cloudflare, which then sends it to our AI model provider, OpenAI, to generate the feedback on our behalf.
• What we keep: Klarweg does not store the text you submit or the feedback returned. To enforce fair-use limits we store only counts: how many AI requests your account made per day and per month, and service-wide totals of requests and usage.
• Limits: Klarweg AI has daily and monthly limits per account, and a small preview allowance on Chapter 1 of each level.
• Accuracy: AI feedback can be wrong. The chapter's own explanations and answer keys are the authoritative version.

9. How long we keep data

We retain your account data for as long as your account is active. Where you ask us to delete your data, we will honour that request where possible, while retaining information we need to keep for legal, accounting, security, fraud-prevention, or dispute-resolution purposes.

10. Your choices — access, correction, deletion

To ask what data we hold about you, to correct it, or to request deletion, email klarwegofficial@gmail.com from the address on your account.

You can remove individual saved words yourself at any time from the Saved Words page, without contacting support.

11. Children and minors

Klarweg does not currently enforce a minimum age for account creation. If you are a parent or guardian and believe a minor in your care has created an account or provided personal information without your consent, contact us at klarwegofficial@gmail.com and we will address it. We do not knowingly target advertising at children, and — as noted above — we do not run advertising or tracking of any kind.

12. Changes to this policy

We may update this policy as Klarweg's features change. We'll update the "last updated" date above when we do. Continued use of Klarweg after a change means you accept the updated policy.

13. Contact

Questions about this policy, or about your data: klarwegofficial@gmail.com. Klarweg does not currently have a separately designated grievance officer; the address above is the single point of contact for privacy questions and complaints.

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