Privacy Policy
Last updated: July 2026
Overview
This Privacy Policy explains what information Lumen collects, why, and how you can control it. Lumen is a Bible reading app with an optional Plus subscription (AI Guide, sermon notes, ad-free reading). We collect the minimum needed to run the app and keep your account working across devices.
Information we collect
Account: email address, display name (optional), and authentication data handled by our sign-in provider (Clerk). Reading activity: chapters read, streaks, bookmarks, favorite verses, and reading-plan progress, tied to your account so it syncs across devices. Guide conversations: the questions you ask Lumen's AI Guide and its responses, so the conversation can continue in the same thread. Sermon notes (Plus): audio you record, plus the transcript and summary generated from it. Payment data: when you subscribe on iOS or Android, Apple's App Store or Google Play handles the transaction — we receive only a subscription status, never card details. When you subscribe via mobile money (Orange Money / MTN MoMo, Cameroon only, available on Android or our website), we store the phone number you provide, the transaction reference, and the amount, in order to process and reconcile the payment. Device/ad data: if you're on the Free tier, Google AdMob may collect device identifiers and usage data to show ads, governed by Google's own privacy policy.
How we use your information
To provide the reading experience (sync progress, bookmarks, streaks across devices), to run the AI Guide and sermon-notes features you use, to process subscription payments and prevent duplicate charges, to show ads to Free-tier users, and to fix bugs and understand which features are used so we can improve the app.
Third-party services we use
Clerk (authentication), Anthropic (powers the AI Guide's responses — your questions are sent to Anthropic's API to generate an answer), Google AdMob (ads for Free-tier users), and Neon/Vercel (database and hosting infrastructure). Payment processing depends on where you subscribe — Apple's App Store on iOS, Google Play on Android, or KeyPay (mobile money in Cameroon) on our website. Each of these providers processes data under their own privacy policy in addition to this one.
Data sharing
We don't sell your personal information. We share data with the service providers listed above only as needed to run the app (e.g. sending your question to Anthropic to get a Guide response, or sending your phone number to KeyPay to collect a mobile money payment if you chose that method). We may disclose information if required by law.
Data retention
We keep your account data for as long as your account is active. If you delete your account, we delete or anonymize your personal data within a reasonable period, except where we're required to keep records (e.g. payment records for tax/accounting purposes).
Your rights
You can access, correct, or delete your account data by contacting us at contact@thelumen.uk — see Delete Your Data for the specifics. If you're in a jurisdiction with data-protection law (e.g. GDPR), you may also have the right to export your data or object to certain processing — contact us and we'll do our best to help.
Children's privacy
Lumen is not directed at children under 13, and we don't knowingly collect personal information from them. If you believe a child has provided us with personal data, contact us and we'll delete it.
Security
We use industry-standard measures (encrypted connections, provider-managed authentication and payment processing) to protect your data, but no system is 100% secure. Please use a strong, unique password-equivalent (e.g. your email provider's own security) for your sign-in method.
Changes to this policy
We may update this policy as the app changes. We'll update the date above when we do; significant changes will be flagged in the app.
Contact us
Questions about this policy? Reach us at contact@thelumen.uk.