Privacy Policy

Last updated: August 17, 2026

This policy explains what Rebound AI (“Rebound”, “we”, “us”) does with your information when you use the Rebound study planner. It is written to be read, not to be skimmed past. If anything here is unclear, ask us — the contact address is at the bottom.

1. What we collect

Account information

If you create an account, we collect the email address you sign up with and the authentication records our sign-in provider needs to keep you signed in. We never receive or store your password in readable form.

Planner content

This is the substance of the product: your courses, fixed commitments such as classes, shifts and practice, one-off events, tasks and deadlines, routines, the study blocks Rebound schedules for you, and the repair receipts explaining why a block moved. It also includes your display name, theme, and onboarding answers if you provided them.

Study materials you provide

Notes, photos of pages, syllabi, uploaded files, imported course material, notebooks, flashcard sets, quiz results, spaced-repetition history, and your conversations with the in-app assistant. You choose what to put in; we do not go looking for more.

Diagnostic information

We use Sentry for error reporting. When something breaks, Sentry receives a technical report — the error, where in the code it happened, browser and device details, and the account identifier where one is available — so we can find and fix the fault. This is operational data, not a behavioural profile.

Local quality history

Rebound can keep a small record on your device of how well its scheduling performed. It is content-free by design: bounded outcome counts and coarse timing only, never your prompts, replies, titles, schedule contents, or exact interaction times. It never leaves your device, is not synced to your account, and you can pause and clear it in Settings → Data.

2. How we use it

• To build, repair, and explain your schedule.
• To generate the study aids you ask for — flashcards, quizzes, guides, and answers grounded in your own materials.
• To keep you signed in and to sync your plan between your devices.
• To diagnose failures and keep the service working.
• To respond when you contact us.

We do not use your information to advertise to you, and we do not build or sell profiles of you.

3. AI processing

Rebound’s AI features work by sending the relevant content to third-party AI service providers such as Anthropic and OpenAI (including routing services that reach those providers on our behalf). This happens when you use them, with the content those features need:

• Planning assistance — the parts of your schedule and task list relevant to the request.
• Study generation — the notes, pages, or source material you selected for the flashcards, quiz, or guide.
• Grounded answers — the passages from your own materials needed to answer your question and cite the source.
• Lecture transcription — if you use it, the audio you record is sent for transcription.

Content is sent only to deliver the feature you asked for. We do not use your content to train our own models, and we do not permit our AI providers to train their models on it. These providers process the content, return a result, and are bound by their agreements with us. Because processing happens on their infrastructure, an AI request necessarily leaves your device.

Every AI action that would change your schedule is shown to you as a preview you confirm or reject. Nothing is written to your plan behind your back.

4. Storage and sync

Rebound is local-first. Your planner is created and kept in your browser’s local storage on the device you are using, and it keeps working there.

When you are signed in, that state is mirrored to records in our database that are owner-scoped: access rules enforced by the database itself tie every row to the account that owns it, so one account’s data cannot be read by another. Uploaded study files are stored under the same ownership rules. See our Security page for how this is enforced.

Some device-local data is deliberately excluded from sync entirely, including the quality history described above and local planning check-ins.

5. Sharing

We share your information only with the service providers we need to run Rebound, and only for that purpose:

• Vercel — application hosting and delivery.
• Supabase — authentication, database, and file storage.
• AI service providers such as Anthropic and OpenAI — processing for the features described in section 3.
• Sentry — error reporting and diagnostics.

We do not sell your personal data. We do not share it with advertisers or data brokers. We may disclose information if we are legally required to, or where it is necessary to protect the safety of a person or the integrity of the service.

Study sets you choose to share

If you create a share link for a study set, anyone holding that link can view that set for as long as the link is active. This is entirely opt-in, it is limited to the set you shared, and you can revoke the link at any time, which immediately stops it working.

6. Retention and deletion

We keep your planner content and study materials for as long as your account exists, because that is the product. Diagnostic reports are kept only as long as they are useful for fixing faults.

Reset all data in Settings clears the planner state on your device and the corresponding owner-scoped records for your account. Deleting your account removes the records owned by that account. Backups and logs may retain copies for a short period before they age out on their normal cycle.

7. Your rights

Depending on where you live you may have legal rights over your personal data. Independently of that, Rebound is built so you can exercise the important ones yourself:

• Access and export. Settings → Data offers Export data (JSON) for your full planner state and Export calendar (.ics) for your upcoming schedule.
• Correction. Everything in the planner is directly editable in the app.
• Deletion. Use Reset all data, or ask us to delete your account.
• Objection and restriction. You can decline AI features and still use the planner; write to us for anything else.

To make a request that you cannot complete in the app, email us at legal@reboundai.app. We may need to confirm you control the account before acting.

8. Students and minors

Rebound is built for students and is intended for people aged 13 and over. We do not knowingly collect personal information from children under 13. If you are a parent or guardian and believe a child under 13 has created an account, contact us and we will delete the account and its data.

If you are under 18, please review this policy with a parent, guardian, or teacher before uploading course material.

9. Changes to this policy

We will update this policy as the product changes. The revision date at the top always reflects the current version. If a change materially affects how we handle your information, we will give notice in the app before it takes effect.

10. Contact

Questions, requests, or complaints about privacy: legal@reboundai.app.