Privacy Policy

Last updated: 17 June 2026

Halcyday (“we”, “our”, the “app”) is a daily-planner app for iPhone and iPad. This policy explains what data the app uses, where it is stored, and the limited cases in which any data leaves your device. We designed Halcyday to keep your information on your device and, if you use iCloud, within your own private Apple iCloud account — never on our servers.

1. Data stored on your device and iCloud

Your tasks, subtasks, categories, recurring routines, sleep schedule, app settings, and AI Planner chat history are stored locally on your device using Apple's on-device database (SwiftData). This information is not uploaded to us and is not tied to any Halcyday account — Halcyday does not require you to create an account or sign in.

If you are signed in to iCloud on your device, Halcyday keeps a copy of this data in your own private iCloud account so it stays up to date across your Apple devices. This uses Apple's CloudKit private database: the data lives in your personal iCloud space, is stored and secured by Apple under Apple's privacy policy and iCloud terms, and is not accessible to us — we never receive, store, or process your synced planner data on our servers. If you are not signed in to iCloud, your data simply stays on your device. You can turn iCloud syncing for Halcyday on or off, or sign out of iCloud, in the iOS Settings app.

2. AI Planner

The AI Planner is an optional feature. It is powered by Google's Gemini models, accessed through Halcyday's own secure server. Data is sent only when you send a message to the assistant, and only the following is transmitted:

• The chat messages you type to the assistant.
• Your existing tasks and subtasks — optional, controlled by a switch you can turn off at any time.
• Your category names, so suggestions match your structure.
• Your wake-up and bedtime, so the assistant avoids scheduling during sleep.
• Your time zone and local time, to resolve dates such as “tomorrow”.

This data is used solely to generate your reply. It is never sold, never used for advertising, and not used to train models. We never send your name, contacts, location, photos, health data, or anything outside the app. Before the AI Planner can be used, the app shows a consent screen describing exactly this; the feature is disabled until you accept. Google processes the request as our service provider — see Google's privacy information at policies.google.com/privacy.

3. Calendar & Reminders

If you grant permission, Halcyday can read your iOS Calendar events and Reminders so it can display and import them onto your timeline. This happens on your device only — your calendar and reminder data is not transmitted to our servers or to any third party. You can revoke this access at any time in the iOS Settings app.

4. Notifications

If you allow notifications, Halcyday schedules local reminders for your tasks directly on your device. These are local notifications; we do not operate a push server and do not collect a device token.

5. Subscriptions

Halcyday Pro is sold as an auto-renewing subscription through Apple's App Store. All payment processing is handled by Apple; we never receive or store your payment details. To confirm an active subscription, the app sends Apple's purchase receipt to our verification server. This receipt contains no personal contact information. You can manage or cancel your subscription in your Apple Account settings.

6. Analytics & tracking

Halcyday contains no third-party advertising and no cross-app or cross-site tracking. We do not use advertising identifiers, and we do not build profiles of you.

7. Data retention

On-device data remains until you delete it in the app or remove the app. If iCloud syncing is enabled, the copy held in your private iCloud account is managed by Apple and persists there until you delete it from within the app (on any synced device) or remove it through iCloud storage management. AI requests are processed transiently to generate your reply and are not retained by us to build a profile of you.

8. Children

Halcyday is not directed to children under 13, and we do not knowingly collect personal information from children.

9. Your rights

Because your planner data lives on your device and in your own private iCloud account, you remain in control of it. You can edit or delete any item, turn off task sharing with the AI, disable iCloud syncing for Halcyday in the iOS Settings app, or remove the app to erase its local data. For any privacy request, contact us using the details below.

10. Changes to this policy

We may update this policy from time to time. Material changes will be reflected on this page with an updated date above.

11. Contact

For privacy questions, please reach us through our contact page.