Plume · Last updated: October 21, 2026
Plume is a study app that turns an exam into a day-by-day plan and your topics into study sheets. This policy explains what we collect, how it is stored, and the third parties that process it.
The content you create or import: your exams (name, subject, date, topics, and any grade goal you set), your plan progress, your study sheets and notes, the text you capture or paste, and your practice answers and scores.
If you sign in, we process your email address for sign-in. With Sign in with Apple you can hide your real address. With Google, Google also shares your name with us; we don't use it.
If you subscribe, we store your verified subscription status (which plan, and when it renews or ends) so Premium works on all your devices. Payment is handled entirely by Apple; we never see your payment details.
Your content is stored locally on your device. If you sign in, it is also synced to our secure backend (Supabase) so your plan and sheets are available across your devices. We do not store your content for any purpose other than running the app for you.
Suggesting topics for an exam, writing study sheets, grading your answers, and practice questions work by sending the text needed for that request to our AI provider, xAI (Grok), through our backend, which returns the result. That text is an exam's name and subject, a topic name, or the notes, pasted text, or photo text you add. The app asks before it sends anything the first time. See xAI's Privacy Policy for how they handle data they process.
So these features work, and so free usage can be limited fairly, the app creates an anonymous, device-linked account with our backend the first time you use an AI feature, even before you sign in. It holds a random identifier and your AI-usage counts, including when your free first day began. It is not your email or name and is not linked to your identity unless you choose to sign in. It is used only to run the service and apply usage limits, never for advertising or tracking.
Reading text from photos and PDFs (Apple's Vision and PDFKit), including snapping a study guide into a topic list, happens on your device. Your photos and files are not uploaded. Only the text read from them becomes part of your topics or notes, and it is sent to the AI only when you use an AI feature on it, as described above.
When you save a sheet or plan to Photos, Plume asks only for permission to add images. It cannot see your photo library. Reminders, such as today's plan or the day before a free trial ends, are scheduled on your device.
Supabase: account, secure storage, sync, and usage limits. Policy
xAI (Grok): AI processing of the text you submit. Policy
Apple: Sign in with Apple, subscriptions, and in-app purchases. Policy
Google: only if you choose to sign in with Google. Policy
We do not track you across other apps or websites, we do not show ads, and we do not sell your data.
Plume is not directed at children under 13.
You can delete your account and its synced data from inside the app (You → Delete account). Deleting the app removes the data stored locally on your device. For any request, contact karoljaworsky@gmail.com.
© 2026 Karol Jaworski