What is Sundial?

Sundial is a feature-rich application designed for iOS and Apple Watch that accurately tracks sun and moon cycles, providing users with detailed rise and set times, twilight phases, and lunar events. The app includes 20 customizable lock screen widgets and 15 home screen widgets, making it easy to access crucial solar and lunar data directly from your device. Its Apple Watch app offers hundreds of complications and deep customization, enabling users to display a wide variety of astronomical data at a glance, all without requiring a cellular connection.

Users can set alerts for up to 24 sun and moon events—such as sunrise, sunset, various twilight phases, moonrise, and moon phases—enabling efficient daily planning around natural light conditions. With Sundial Extras, users unlock unlimited alerts, unlimited time travel to past or future dates, and the ability to jump to different world locations for precise data anywhere. Sundial employs device-based calculations, respects user privacy by not uploading location data, and offers a unique interface showing daylight and moonlight changes across the seasons.

Features

Sun & Moon Tracking: Displays rise, set, twilight, and moon phases accurately for any date and location.
Customizable Widgets: Offers 20 lock screen and 15 home screen widgets with deep configuration options.
Apple Watch Integration: Includes an app with hundreds of possible complications and swipable widgets.
Alerts & Notifications: Allows the creation of notifications for up to 24 solar and lunar events.
Location-Based Calculations: Adjusts data and notifications based on significant location changes using geofencing.
Privacy-Friendly: No location data is uploaded or tracked beyond device-level use.
Unlimited Alerts & Features (Sundial Extras): Unlocks additional widgets, unlimited time and location travel, and detailed data displays.

Use Cases

Plan outdoor activities based on sunrise, sunset, or twilight phases.
Receive timely reminders for solar and lunar events such as moonrise or equinoxes.
Optimize photography sessions with accurate golden and blue hour alerts.
Track daylight changes across seasons for farming or animal care.
Set custom alerts for religious or spiritual routines tied to lunar phases.
Manage daily tasks for photophobia or light sensitivity.
Enhance Apple Watch faces with customizable solar and lunar complications.
Coordinate travel or sports around optimal daylight hours at any location.

FAQs

What devices are supported by Sundial?

Sundial is compatible with iPhone (iOS16 or newer), iPad, and Apple Watch Series 3 and above, including SE and Ultra models.
Does Sundial require a subscription?

No, Sundial offers a free core version, with additional features available via a one-time purchase of Sundial Extras; there is no ongoing subscription.
How does Sundial handle user location data?

Sundial calculates all solar and lunar data locally on your device and does not upload or track your location on external servers.