Leu

Privacy Policy

Leu is an iPhone app for tracking pet medications, medication doses, seizure events, important contacts, and caregiver collaboration.

Last updated: March 28, 2026

Overview

Leu is designed to keep pet-care history on your device and, when cloud sync or caregiver sharing is enabled, in your iCloud account through CloudKit.

Leu does not use ads, third-party analytics SDKs, or cross-app tracking.

Pet History and Care Data

Leu can store the following data for app functionality:

  • pet profiles
  • medications and schedules
  • dose logs
  • seizure history
  • important contacts
  • caregiver display names used inside shared history

This data is stored locally on your device. When you use iCloud sync or caregiver sharing, it also syncs through Apple's CloudKit infrastructure so your devices and invited caregivers can stay up to date.

Real-Time Caregiver Alerts

To deliver real-time caregiver notifications, Leu uses a minimal push relay built on Cloudflare Workers and D1.

That relay stores only what is needed to deliver and deduplicate notifications, including:

  • APNs device tokens
  • opaque installation identifiers
  • opaque account-membership identifiers
  • caregiver-event kind (doseLogged or seizureLogged)
  • minimal relay housekeeping metadata used for dedupe, cleanup, and rate limiting

By default, caregiver alerts use generic lock-screen text. They do not include pet names, caregiver names, medication names or dosage amounts, or seizure timing details.

Notifications, Sharing, and Export

Medication schedules can be saved even when notifications are off. Notification permission only controls whether iOS can deliver reminder notifications and caregiver alerts.

CSV exports are generated on device and are only shared when you explicitly choose to export them.

Caregiver collaboration uses Apple's iCloud sharing flow.

Retention

Leu's relay housekeeping currently aims to:

  • remove stale installation rows after 45 days
  • remove caregiver-event dedupe rows after 14 days
  • remove rate-limit rows after 2 days

These windows may change if Leu's notification architecture changes.

Tracking and Analytics

Leu does not use your data for advertising, marketing, or cross-app tracking.

Leu's product goal is that pet history remains on device and in iCloud, not in a Leu-owned analytics backend.

Changes

If Leu's data flows change, this policy should be updated before the related build is shipped.

For privacy questions, use the support or contact information published with Leu's TestFlight or App Store listing.