Privacy Policy
Last updated: September 26, 2026
This policy explains how Kaptu collects, uses, and protects your data. We collect the minimum needed to operate the service and we do NOT sell personal data.
1. Data we collect
• Account: email, username, profile photo, and phone number (phone is optional and helps friends find you). • Content you create: vocabulary cards, photos you take or upload, chat messages, and group activity. • Location (optional, off by default): only when you turn on "Show on map" in Settings is your location stored and shown (rounded to about 200 m) to other users on the "People near you" map. If GPS is unavailable, we estimate an approximate location from your IP address via ipapi.co / ip-api.com. Turning it off stops sharing and deletes your stored location. • Contacts (optional): contacts are matched ON YOUR DEVICE to suggest friends who already use Kaptu — your contact list is not uploaded to our servers. • Purchases: transactions are processed by Google Play / the App Store and RevenueCat; we only receive your Pro entitlement status and never store payment cards. • Technical data: crash logs (Firebase Crashlytics), push notification tokens (Firebase Cloud Messaging), device type, and OS version.
2. How we use data
To operate core features (card sync, review, chat, friends); suggest friend connections; verify Pro entitlements; send study reminders and message notifications; fix bugs and improve the app; and prevent abuse.
3. Third-party processors
Supabase (backend and database) · Google Play / Apple App Store (payments) · RevenueCat (subscription management) · Firebase Crashlytics and Cloud Messaging (crash reports, notifications) · Google / Apple Sign-In (authentication) · Resend (OTP emails). Each processes data under its own privacy policy.
4. Data sharing
We do not sell personal data. Your public profile (name, photo, learning streak) is visible to friends and — if you turn on "Show on map" — to users around you, according to the privacy settings you choose in the app.
5. Retention and deletion
Data is kept until you delete your account. You can delete your account in Settings; your personal data and content are then deleted or anonymised, except records the law requires us to keep (for example, transaction records managed by the stores).
6. Your rights
You can view and edit your profile in the app and revoke granted permissions (camera, location, contacts, notifications) in your device settings. To delete your personal data from KAPTU, delete your account in Settings (or see https://kaptu.online/delete-account/). We do not offer partial data deletion while keeping the account.
7. Security
Data is transmitted over encrypted channels (TLS) with restricted access. No system is perfectly secure, but we apply reasonable safeguards to protect your data.
8. Children
Kaptu is not intended for children under 13 and we do not knowingly collect their data. Accounts found to belong to children under 13 will be deleted.
9. International transfers
Our servers and processors may be located in countries other than yours; by using Kaptu you consent to that transfer, with appropriate safeguards.
10. Changes to this policy
We will notify you in the app before material changes to this policy take effect.
11. Contact
Privacy questions: hongviet.xyz@gmail.com.