Privacy Policy

1Overview

Lumen ("we," "our," "the app") is a text-to-image creation app. This policy applies to the Lumen mobile app on Android and iOS. We built Lumen around a simple principle: your generations and collection are stored locally on your device, not on a Lumen server — because there isn't one. The only server-side data we hold is your account record (for signing in) and, if you subscribe, your subscription status.

2Account information

When you create an account, we collect:

This account record is used solely to let you sign in, sync your subscription status, and identify your account if you contact support. We do not sell this information or use it for advertising.

3Your prompts & images

The text prompts you write and the images Lumen generates from them are stored only on your device (in local app storage), not uploaded to or backed up on any Lumen server. If you uninstall the app or clear its data, this content is gone unless you've saved images to your device's photo library yourself.

To generate an image, your prompt text is sent to our image-generation provider so it can render the picture. This request does not include your name, email, or any other account information — only the prompt text and style selection needed to create the image.

4Payments

Subscription payments are processed entirely by Stripe, a PCI-compliant payment processor. Lumen never sees or stores your card number, expiry date, or CVC — that information goes directly to Stripe. We only receive confirmation that a purchase was completed, which we use to unlock Gold features on your account.

5Notifications

If you turn on the optional "Daily credit reminder," Lumen registers a push notification token with Expo's notification service to deliver that reminder. No personal information is attached to this token beyond what's needed to route the notification to your device. You can turn this off anytime in Profile → Preferences.

6Who we share data with

Lumen does not sell your data or share it for advertising purposes. We use these third-party services to operate the app:

• Firebase Authentication (Google) — manages sign-in and account records.
• Stripe — processes subscription payments.
• Image generation provider — renders images from your prompts.
• Expo — delivers optional push notifications and app updates.

Each of these providers processes data only as needed to perform their specific function for Lumen, under their own privacy policies.

7Retention & deletion

Your generations, saved collection, and preferences live in local app storage until you delete them, uninstall the app, or delete your account. Your account record and subscription status are kept until you delete your account.

You can permanently delete your account at any time from Profile → Delete account. This removes your account record, and clears your local generations, saved collection, and subscription status from the app immediately. This action cannot be undone.

8Children's privacy

Lumen is not directed at children under 13, and we do not knowingly collect information from children under 13. If you believe a child has provided us with personal information, contact us and we'll delete it.

9Your rights

Depending on where you live, you may have the right to access, correct, or delete your personal information. You can exercise these rights directly in the app:

• Access or correct your name/email via your account settings.
• Delete your account and all associated local data via Profile → Delete account.
• Contact us for anything the app can't handle directly — see below.

10Changes to this policy

If we make material changes to this policy, we'll update the effective date above and, where required, notify you in the app. Continued use of Lumen after changes take effect means you accept the updated policy.