Privacy Policy

Effective 15 November 2026

Who we are

This policy covers the app “Diagramic: AI Diagram Maker” for Mac (the “app”) and this website. Both are published by YozatApps. Questions and requests: yozatapps@gmail.com.

1. Without an account, your boards stay on your Mac

The app works without an account. Your projects, boards and pictures are files on your Mac. Deleting the app's data deletes them. Exported files go only where you save them.

2. If you sign in

Signing in is optional and uses Sign in with Apple. We receive an account identifier and the email address Apple gives us (your real one or Apple's private relay address, as you choose). The account is kept in Google Firebase Authentication (project “diagramic-34756”). We use it to hold your coins and your plan, and for the features below.

• Sync (Pro): your projects, boards, small pictures and assistant conversations are copied to Google Cloud Firestore under your account, so your other Macs can show them. Only your account can read them.
• Deleting your account: Your account (at the bottom of the sidebar) › Delete account removes the account and everything stored under it on our servers. Boards on your Mac stay until you delete them.

3. The assistant

When you send a message to the assistant, the app sends it to our server together with what the assistant needs to answer: the names of the project's boards, the content of the board you are working on and the recent messages of that conversation. Our server passes this to OpenAI (the OpenAI API) to produce the reply. We do not use this content for advertising. OpenAI processes it under its API terms.

For each reply we keep a usage record: your account identifier, the project, the AI model, the number of tokens, its cost and the coins charged. We use it for billing, to prevent abuse and to understand costs.

4. The local AI connection (MCP)

If you turn it on, AI tools running on your own Mac can read and edit your boards through a local connection. It is off by default and nothing goes through our servers. What such a tool does with your boards is governed by that tool's own terms.

5. Usage analytics

To learn which parts of the app work, the app sends usage events to our own backend on Google Firebase (project “yozatapps”). They contain:

• a random install identifier, and your account identifier if you are signed in
• actions, by name and count: for example a board created, a shape type picked, an export format, an assistant message sent (never its text), a settings change, a screen of the introduction
• purchases: that one started, succeeded or failed, the product, the price and currency, and whether you have a plan
• the app version, Mac model, macOS version, language and App Store country

These events never contain the content of your boards, your messages to the assistant or your email address. We do not use an advertising identifier and we do not track you across other companies' apps or websites.

6. Feature requests

If you send a feature request from Settings, we receive the email address and the message you type, with your language and, if you are signed in, your account identifier. We use them to answer you and to improve the app.

7. Purchases

Subscriptions, the lifetime purchase and coin packs are paid through Apple with your Apple Account. We never see your name or payment details. The app sends Apple's signed purchase receipt to our server, which checks it and adds the plan or the coins to your account.

8. No ads, no selling of data

The app has no ads. We do not sell personal data and we do not share it for advertising or marketing.

9. Where data is processed and how long it is kept

Account data, synced boards, usage records, analytics events and feature requests are stored for us by Google (Firebase, Google Cloud) and may be processed in the United States and the European Union. Assistant requests are processed by OpenAI. Account data and synced content are kept until you delete them or your account. Purchase and usage records are kept as long as accounting rules require. Analytics events are kept to compare versions of the app over time.

10. Your rights

You can ask for a copy of your data, a correction or deletion at any time by writing to yozatapps@gmail.com. If you live in the European Economic Area or the United Kingdom, you can also complain to your data protection authority. We process the data above to provide the service you ask for (account, sync, assistant, purchases) and, for analytics, on the basis of our legitimate interest in improving the app.

11. Children

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

12. This website

This website uses no cookies, no analytics and no third-party scripts. Our hosting provider (Google Firebase Hosting) processes the IP address of each request to deliver the page.

13. Changes

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