Privacy Policy

Last updated: 3 October 2026

Lumo is made by CoralCell Ltd, registered in England and Wales ("we"). Contact: contact@coralcell.com.

Your photos

When you apply an effect or describe an edit, the photo you chose (resized) and your instruction are sent over an encrypted connection to Google's Gemini model, through Google Firebase, which returns the edited image. We do not keep a copy of your photos, instructions or results on any server. Google processes this content as our service provider under its terms for paid Gemini API use, which state it is not used to train Google's models.

Your originals and edits are stored only on your phone, in the app's history, until you delete them or the app. Lumo reads only the photos you pick and saves to your library only when you tap Save.

Voice

If you speak an edit, speech is converted to text by your phone's own speech recognition service (Apple or Google) and only the text is used.

Usage, crash and purchase information

• Anonymous identifier created with Firebase Authentication, not linked to your name, email or phone number.
• Analytics (Google Analytics for Firebase): which effects are used and whether edits succeed. Never the photos or what you typed.
• Crash reports (Firebase Crashlytics): technical details when the app crashes.
• Subscriptions: payments are handled by Apple or Google; RevenueCat receives the receipt and the anonymous identifier so the app knows you have Pro.

We do not sell data or use it for advertising.

Your rights

You can ask us for access to, or deletion of, data linked to your anonymous identifier (shown in Settings). You can also complain to the UK Information Commissioner's Office.

Children

Lumo is not directed at children under 13.