Lunaya
Privacy Policy
Last updated: 15 September 2026
Lunaya is a Vietnamese lunar calendar app. This page states what the app collects, what it does not, and how you control your data.
The principle: without signing in, nothing leaves your device
Every calendar feature — the daily sheet, day details, events, reminders, reference tools — runs entirely on your device. While you are not signed in, the app sends no data anywhere. Signing in is optional and exists only to back up and sync your events and day notes across devices.
What is collected when you sign in
If you choose to sign in with Google or Apple, the following is stored on our server:
| Data | Why |
|---|---|
| Email address, display name, profile picture | To recognise your account across devices |
| Events you create — title, notes, location, time, repeat rule | Backup and sync |
| Notes you write on individual days | Backup and sync |
Data is held in Google Cloud Firestore, transmitted over an encrypted connection (HTTPS), and readable only by your own account — the server's security rules are bound to your user ID.
Location — only when you tap the button
The event editor has a "Use current location" button that fills in the Location field for you. Tapping it asks for your location once, then immediately turns it into a place name (for example "District 1, Ho Chi Minh City") which you can edit. The app stores no coordinates, does no tracking, and never reads location in the background.
That text is part of the event, so it leaves your device only if you signed in and enabled sync. If you never tap the button, the app never asks for location.
The travel and geomancy compasses use the magnetometer, not location — both work even if you deny the permission.
In-app purchases
The Support the developer section in Settings lets you make a one-time purchase. The transaction is handled entirely by the App Store or Google Play; Lunaya never sees or stores payment details, and no server of ours records your purchase history.
Supporting unlocks nothing — every feature is free for everyone.
What Lunaya does NOT collect
- Contacts, photos, files, messages, browsing history.
- Advertising ID. The app has no advertising and does not declare the
AD_IDpermission. - Health or financial information.
- Your personal calendar. If you enable "Sync to system calendar", the app writes to a separate calendar it creates; it does not read or transmit your existing events.
The app uses no behavioural analytics and shares no data with third parties.
Permissions, and what each is for
| Permission | Used for |
|---|---|
| Notifications | Delivering reminders you set |
| Exact alarms | Firing reminders on time; without it reminders still work, a few minutes off |
| Read/write calendar | Only when you enable system calendar sync |
| Run at startup | Restoring your reminders after you restart the phone |
| Location (approximate) | Only when you tap "Use current location" in the event editor |
Some technical permissions (network, biometrics) are brought in by Google's sign-in libraries. Lunaya itself does not use biometrics.
Deleting your data
- In the app: Settings → Account → Delete account. This removes your server-side data and your account. Data on your device is untouched — it is your data, on your device.
- If you have uninstalled the app: follow the instructions at vanvolabs.com/lunaya/account-deletion-en.html.
Requests are handled within 30 days.
Children
Lunaya is not directed at children under 13 and does not knowingly collect children's data.
Changes
If this policy changes, the date at the top changes with it. Significant changes will be announced in the app.
Contact
Email: guestx100@gmail.com