Solis: Sun & Moon
Daylight & Lunar Instrument
Free · In‑App Purchases
Follow golden hour, twilight, lunar phases, yearly daylight, and real-world Sun and Moon paths with precision Sky AR.
Solis is a precision sun and moon almanac for observing natural light. Follow the Sun, Moon, twilight, seasons, and celestial paths from one calm iPhone experience.
TODAY
See sunrise, solar noon, sunset, golden hour, civil twilight, current solar elevation, weather context, and the day’s changing light.
MOON
Explore a monthly moon calendar with realistic illuminated phases, zodiac transitions, rise and set times, and precise lunar ephemerides.
YEAR
Understand annual daylight rhythm, solstices and equinoxes, daily daylight change, solar paths, and seasonal light patterns.
CELESTIAL SKY AR
Open the camera to align Sun and Moon trajectories with the real sky. Use the Quick Time precision ruler to move through the day and inspect celestial positions at specific times.
EARTHLIGHT
Explore Earth’s day-and-night terminator and seasonal axial tilt with an interactive 3D globe.
WIDGETS
Keep useful solar and lunar context visible from the iPhone Home Screen.
SOLIS FULL
Try everything free for 7 days. Then unlock the full app with a single one-time purchase. No subscription. Existing Solis owners keep their unlock.
PRIVACY
No ads and no third-party analytics. Astronomy calculations, saved locations, and preferences are handled on device. Solis uses Apple services for weather, maps and geocoding, purchases, and system permissions when those features are used.
Designed for photographers, travelers, astronomers, architects, and anyone who plans life around natural light.
Try every feature free for 7 days, then unlock the full app with a one-time lifetime purchase. There are no subscriptions and no feature tiers.
The developer, Jiajia Zhang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Jiajia Zhang
- Size
- 37.5 MB
- Category
- Weather
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Solis Full $4.99
- Copyright
- © 2026 Jiajia Zhang