← Dviny

Privacy Policy

Last updated: 9 November 2026

Dviny is a trip planner for small groups: a shared timeline of days and events, ideas, and a checklist. It is made by Nikolai Viushin (“we”). This page explains what data the app handles and why.

What we collect

• Account. You sign in with Apple or Google. We receive a user ID and, if you allow it, your name and email address. We use them to show who is in a trip and to let others invite you. We never see your password.
• Trip content. Trips, days, events, costs, ideas, checklist items, and member roles that you or other members of a trip enter. This is the purpose of the app.
• Technical data. Our backend (Google Firebase) keeps standard request logs such as IP address and timestamps for security and reliability.

We do not collect location, contacts, photos, advertising identifiers, or analytics about how you use the app. There are no ads and no trackers.

Where it is stored

Data is stored in Google Firebase (Cloud Firestore and Firebase Authentication) in the European Union. A copy of your trips is cached on your device so the app works offline. Google processes this data on our behalf under the Firebase privacy terms.

Who can see it

A trip is visible only to its members: the owner and the people who joined by invitation link. Each member has a role (owner, editor, or viewer) that limits what they can change. We do not sell or share your data with third parties for their own purposes.

Assistants and the Dviny MCP server

You may connect an AI assistant (for example Perplexity, Claude, or ChatGPT) to Dviny through our MCP server at mcp.dviny.app. This works only after you sign in with the same Apple or Google account and authorize that assistant. The assistant can then read and edit the trips you have access to, with the same role limits as in the app. You can revoke access at any time in the assistant’s settings; tokens expire automatically after 90 days of inactivity.

Your choices

• Leave a trip or delete your own events, ideas, and checklist items in the app.
• To delete your account and all data you own, email us at the address below. We remove it within 30 days.
• Export: on request we provide your trips as JSON.

Children

Dviny is not directed at children under 13 and we do not knowingly collect their data.

Changes

If this policy changes, the new version is published here with a new date.

Contact

Nikolai Viushin · inick7284@me.com