Privacy Policy
Oreumi is operated by whatisvioletmustard (왓이즈바이올렛머스타드). Effective November 4, 2026.
What we collect
- Account: your email address. You sign in with a one-time code we email to you, so there is no password.
- Learning data: your goal, lesson progress (including when you finished each lesson), review cards with your rating history, daily study counts. Before you sign in, these stay only in your browser.
- Pro waitlist: your email and the Pro features you picked, only to tell you when Pro opens. Anything you write about what you want from Pro is kept with feedback (below), to decide what to build.
- Feedback: what you write in the feedback form, the page you came from, your browser type and, if you give it, your email.
- Usage data: which pages and features you use, to improve the service. In the EU and UK we ask first.
- Payments: handled by Paddle (web) or Apple and Google (apps). We receive your subscription status, not your card details.
What we do not collect
Voice recordings made for speaking practice stay on your device. They are not uploaded to our servers.
How we use it
- To run your account, save progress and unlock what you paid for.
- To understand which lessons work, using aggregated analytics.
Where it is stored
Data is stored with our hosting providers in the United States. Where the law requires it, transfers outside your country are covered by appropriate safeguards. We use these processors: Vercel (hosting), Supabase (accounts, learning data, feedback and the Pro waitlist, United States East), Resend (sign-in emails), Paddle (payments) and PostHog (analytics, once it is turned on). Until you sign in, your progress is stored only in your browser on this device.
How long we keep it
We keep account and learning data while your account is open and delete it within 30 days after you delete your account, unless the law requires us to keep it longer (for example, billing records). Feedback is kept for up to a year after we have dealt with it. If you delete your account, we remove your email from feedback you sent and delete your Pro waitlist entry. The Pro waitlist is deleted within 6 months after Pro opens, or sooner if you ask.
Your rights
You can access, correct, export or delete your data, and object to analytics, by emailing whatisvioletmustard@gmail.com. You may also complain to your data protection authority.
Children
The service is not for children under 14, and we do not knowingly collect their data.
Privacy officer and contact
Privacy officer: Jaehee Kim (김재희). whatisvioletmustard (왓이즈바이올렛머스타드), 304, 55 Nambusunhwan‑ro 272‑gil, Gwanak‑gu, Seoul, Republic of Korea. Phone: +82 10 6246 9299. Email: whatisvioletmustard@gmail.com.