Legal
Privacy Policy
The short version. Lumi is built privacy-first. Your screen-time data and your reading data live on your device. We don't sell your data, we don't show ads, and we don't track you across other apps or websites. Your subscription is handled by Apple — we never see your card details.
1. Who we are
Lumi (“Lumi,” “we,” “us,” or “our”) is an iOS app that helps you spend less time in distracting apps and more time reading. This Privacy Policy explains what information the Lumi app and this website (ilummi.app) collect, how we use it, and the choices you have. It applies to the Lumi iOS application and the Lumi website.
2. Information we collect
a. Screen Time & app-usage data (stays on your device)
With your permission, Lumi uses Apple's Screen Time frameworks (Family Controls, Device Activity, and Managed Settings) to block the apps you choose and to measure your usage against your weekly goal. Apple keeps this data on your device and only provides Lumi with opaque, privacy-preserving tokens — we do not receive the list of apps you use, your messages, or your browsing. Usage totals, pickups, and your goal progress are calculated on your device and stored in a private app container. This information is not transmitted to us or any third party.
b. Your settings and reading data (stored locally)
Your weekly goal, blocking schedules, selected apps, book preferences, reading progress, highlights, and notes are stored locally on your device. This data stays on your device and is removed if you delete the app.
c. Book library requests
When you browse or download a book in Lumi's reader, your device contacts our book-catalog service to fetch titles and book files. These requests may include standard technical information such as your IP address, device/OS type, and any search terms you enter. Lumi does not require an account to read, and these requests are not linked to your identity. The books offered are primarily public-domain works (for example, titles from Project Gutenberg).
d. Subscriptions and purchases
Lumi is offered as a paid subscription sold through the Apple App Store. Apple processes all payments under Apple's terms and privacy policy; we never receive or store your credit-card number or full billing details. We receive from Apple the limited information needed to confirm your subscription status (such as a transaction identifier and whether your subscription is active).
e. Diagnostics
If you opt in through iOS Settings, Apple may share aggregate crash and performance diagnostics with us to help fix bugs. Lumi does not embed third-party advertising or analytics SDKs.
3. How we use information
- To block the apps you select and measure progress toward your screen-time goal — on your device.
- To deliver the in-app reader and the books you choose to read.
- To verify and manage your subscription through the App Store.
- To diagnose crashes and improve the app's reliability and performance.
- To respond to your support requests.
4. What we do not do
- We do not sell or rent your personal information.
- We do not show you ads or use advertising trackers.
- We do not track you across other companies' apps or websites for advertising.
- We do not upload your Screen Time data, the list of apps you use, or your reading content to our servers.
5. Apple Screen Time & Family Controls
Lumi's blocking features rely on Apple's Family Controls entitlement. Data accessed through these frameworks is governed by Apple and remains on your device. You can revoke Lumi's Screen Time permission at any time in iOS Settings → Screen Time, which disables blocking and usage measurement.
6. Third-party services
We rely on a small number of service providers, strictly to run the app:
- Apple — App Store distribution, subscription payments, and the Screen Time frameworks. See Apple's Privacy Policy.
- Cloud hosting (Amazon Web Services) — hosts our book-catalog service and the files for the in-app reader.
We do not share your personal information with these providers for their own marketing.
7. Data retention
Data stored on your device remains until you delete it or uninstall the app. Server logs associated with book-catalog requests are retained only for a limited period for security and operational purposes and are not used to build a profile of you.
8. Security
We use industry-standard safeguards, including encryption in transit (HTTPS), to protect information. No method of transmission or storage is completely secure, but keeping the most sensitive data on your device significantly reduces risk.
9. Children's privacy
Lumi is not directed to children under 13, and we do not knowingly collect personal information from children under 13. If you believe a child has provided us information, contact us and we will delete it.
10. Your rights and choices
Because most of your data lives on your device, you control it directly: adjust or clear your settings in the app, manage Screen Time permission in iOS Settings, and delete the app to remove on-device data. Depending on where you live (for example, the EEA/UK under GDPR or California under the CCPA/CPRA), you may have rights to access, correct, or delete personal information we hold, and to object to certain processing. To exercise these rights, email us at the address below. We do not sell personal information.
11. International users
Lumi is operated from, and our service providers may process data in, the United States. By using Lumi you understand your information may be processed in the United States and other countries, which may have different data-protection laws than your own.
12. Changes to this policy
We may update this Privacy Policy from time to time. When we do, we'll revise the “Last updated” date above and, for material changes, provide a more prominent notice. Continued use of Lumi after an update means you accept the revised policy.
13. Contact us
Questions about privacy or this policy? Email privacy@ilummi.app.