Privacy Policy

Liffer is built around the idea that you shouldn't have to give up your data to access offline reference content. This policy explains exactly what we collect, what we don't, and what your options are.

The short version

• There are no accounts. Nothing to sign up for, no email to hand over. The app works fully offline.
• Your bookmarks, reading history, and AI questions stay on your device.
• We collect optional, anonymous usage statistics — you can turn them off with one switch.
• Purchases are processed by Apple. We never see your payment details.
• We don't use third-party analytics SDKs or advertising trackers, and we will never sell your data.

Data we collect

Your content and activity

Stored only on your device. Bookmarks, reading history, downloaded content packs, settings, and everything you ask the AI assistant live in a local database on your phone. None of it is uploaded anywhere.

Anonymous usage statistics (optional)

The app sends minimal, anonymous event counts — for example, how many times a screen was opened or that a content pack was downloaded. These events contain no personal identifiers, no device IDs, no IP-based profiles, and cannot be linked to a specific person. They help us see which features get used and where the app is breaking. You can turn this off any time in Settings → Privacy → Anonymous Analytics — when disabled, nothing is sent at all.

In-app purchases

The optional Liffer Pro unlock is a one-time purchase processed entirely by Apple through your Apple ID. We receive no payment information — no card numbers, no billing address, no Apple ID details. The record that you own Pro is kept by Apple and mirrored on your device.

The on-device AI assistant

If you choose to download the optional AI assistant, it runs entirely on your phone using a local language model. Your questions and the AI's answers are never transmitted to our servers or any third party.

Location

The app does not request or use your location. Ever.

Where data is stored

Almost everything lives on your device. The only thing that reaches our servers (if you leave analytics on) is the anonymous event stream described above, stored on infrastructure we operate in the European Union. All connections use HTTPS with TLS 1.2 or higher.

Sharing with third parties

We do not share, sell, or rent your data to anyone. Period.

The only third parties involved are Apple (payment processing for in-app purchases) and our hosting provider (which serves content-pack downloads and receives the anonymous analytics events on our behalf).

How to delete your data

Delete the app from your device — that removes everything, because everything is on your device. The anonymous analytics events we hold cannot be linked back to you, so there is nothing personal for us to delete.

Children

The app is not directed at children under 13. We do not knowingly collect personal information from anyone, including children. The app is rated 16+ on the App Store due to its medical reference content.

Changes to this policy

If we make material changes to this policy, we will update the "Last updated" date at the top. Continued use of the app after changes means you accept the updated policy.

Contact

Questions about this policy? Email vaidotas@holdmylemonade.com.

A note on medical content

This is a privacy policy, not a medical disclaimer — but worth saying here too: Liffer's content is general reference material adapted from established open encyclopedic sources. It is not medical advice and not a substitute for professional diagnosis or treatment. In an emergency, call your local emergency number whenever possible.