LineFocus helps students manage timetables, tasks, notes, reminders, focus sessions and study files. It also includes optional LineBags QR protection for lost-and-found use. This policy explains what data each part of the app uses.
1. Local student data
Most LineFocus study data stays on your device:
- Student profile, subjects, timetable, tasks, notes, reminders, focus-session history and preferences
- Images, PDFs, DOCX and spreadsheet files you choose to import or attach
- Notification schedules and the in-app notification inbox
This local study data is not uploaded to the LineBags backend by the normal planner features. You can delete individual items in the app. Uninstalling LineFocus or clearing its app data removes locally stored data, subject to any device or operating-system backup you enabled.
2. QR protection and finder data
If you activate a physical LineBags tag, start a digital trial or create a paid digital QR, our backend stores the information needed to operate lost-and-found protection:
- QR public ID, private owner credential, activation app, tag type, activation and expiry dates
- Bag name, finder note, lost/found status and optional emergency contact chosen by you
- Finder messages, optional finder contact, timestamps and read status
- A push-notification token and device platform when notifications are enabled
- A privacy-preserving installation identifier used to enforce one LineFocus trial per stored device installation
A finder who scans the QR can see the public bag name and finder note. Your phone number remains hidden unless you explicitly enable an emergency contact. A finder can send a message through the public page when messaging is enabled.
3. Google account and paid digital QR data
Google sign-in is required only for purchasing and restoring a paid digital QR. We may store your Google account identifier, email address, display name and profile-picture URL, together with the relationship between that LineFocus account and its paid QR entitlement.
A Google identity token is sent securely to our backend and verified for authentication; it is not stored as an account field. Google Play handles payment-card or banking details, which LineFocus does not receive. We store limited purchase-verification information such as product ID, purchase token, verification state and entitlement dates to grant access, restore purchases and prevent reuse.
4. Permissions
- Notifications — study reminders, timetable and focus alerts, and finder-message notifications
- Microphone — voice-based entry only when you choose it
- Camera — scanning QR codes and importing images when requested
- Files or media — importing study files selected by you
You can change permissions in Android settings. Disabling a permission may stop the related feature.
5. How we use data
We use data only to provide app features, authenticate account requests, verify purchases, restore valid paid QRs, deliver notifications, operate the finder page, prevent fraud or abuse, troubleshoot the service and comply with law. We do not sell personal data or share it for third-party advertising.
6. Service providers
- Vercel — website and backend hosting
- Neon — storage for QR, account and finder-message records
- Expo Push Service and Firebase Cloud Messaging — push-notification delivery
- Google Identity Services — Google account authentication
- Google Play Billing — purchase processing and verification
- Cloudflare Turnstile — spam and bot protection on the public finder form when enabled
These providers process data under their own terms and privacy policies. We may also disclose information when legally required or necessary to protect users and the service.
7. Retention and deletion
- Finder messages are automatically deleted after 365 days and can be deleted earlier by the tag owner.
- QR records remain while needed to provide the activated protection, recovery and entitlement service.
- Google profile information remains while the Google-linked LineFocus account exists. A shared profile may remain if the same Google account is still used for another LineBags app.
- After account deletion, limited purchase-verification records may be retained without the Google profile link for up to seven years for fraud prevention, accounting or legal compliance.
8. Children and students
LineFocus is a student productivity app and may be used by younger users with parent or guardian supervision. We do not use student data for targeted advertising and do not sell it. Users should avoid placing unnecessary sensitive information in public finder notes or messages. A parent or guardian may contact us about a child's data.
9. Security
We use HTTPS, private owner credentials, access controls and platform security features to protect data. No system is completely secure. Keep recovery codes private, use a device screen lock and contact us if you suspect unauthorized access.
10. Your choices and rights
- Review, edit or delete study content stored in the app
- Disable optional permissions and notifications
- Edit QR details, delete finder messages or deactivate supported QR services
- Delete your Google-linked LineFocus account in the app
- Request complete or selected-data deletion through our deletion page
11. Policy changes and contact
We may update this policy as LineFocus changes. The latest version and effective date will remain on this page. Questions or privacy requests can be sent to linebagshub@gmail.com.