Privacy Policy

Horizon is an intelligent companion for Apple Calendar that organizes your events into meaningful categories and surfaces what matters most. Privacy is not an afterthought. It is a core design principle.

Horizon processes all data entirely on your device. There are no servers, no accounts, no tracking, and no external data processing of any kind. Your calendar data never leaves your iPhone.

Horizon accesses your calendar events through Apple's EventKit framework. This includes event titles, dates, times, locations, notes, and calendar metadata (such as calendar name and account type).

Horizon uses this information solely to categorize events, generate briefings, detect duplicates, and provide other features described in the app. No other personal information is accessed or collected.

Horizon requires calendar access to function. This permission is requested through Apple's standard permission dialog when you first open the app. Horizon can read your events and allows you to make changes, but it will never modify anything without your explicit action.

You can grant or revoke calendar access at any time in your iPhone's Settings under Privacy & Security > Calendars. All categorization and intelligence sits on top of your existing calendars. Nothing is changed unless you tell it to. Revoking access will prevent Horizon from accessing your events, and no data is retained after access is revoked.

All data processing happens locally on your iPhone. Horizon uses on-device intelligence to classify events into categories, analyze your schedule, detect duplicates, and generate daily and weekly briefings.

No calendar data is sent to any server, API, or cloud service. Horizon does not make network requests with your calendar data under any circumstances.

Horizon's intelligence runs entirely on your iPhone. Event classification, pattern recognition, and all analysis features operate using on-device processing. This approach ensures your data remains private while delivering fast, responsive performance.

Horizon does not include any analytics frameworks, tracking pixels, crash reporters, or telemetry of any kind. There are no SDKs collecting usage data, no A/B testing frameworks, and no behavioral tracking.

Horizon does not know how you use the app, which features you access, or how often you open it.

Horizon does not share any data with third parties. There are no advertising partners, no data brokers, no analytics providers, and no third-party SDKs that receive your data.

Your calendar data is not stored in any external database, cloud service, or backup system operated by Horizon. Any data Horizon processes exists only in your device's local storage and is managed by iOS.

You are in full control of your data at all times. You can:

• Revoke calendar access in iOS Settings at any time
• Customize or override event categories
• Delete the app to remove all locally stored preferences
• Use Horizon without creating any account or providing any personal information

If this privacy policy is updated, the changes will be reflected on this page with an updated date. Horizon's commitment to on-device-only processing and zero data collection will not change.

If you have questions about this privacy policy or how Horizon handles your data, contact us at support@horizoncalendar.io.