Epicycle: Learn the Sky
Stars, stories & space science
About
This app offers an offline astronomy companion for exploring the night sky. It provides educational content on stars, constellations, and planets, along with interactive sky maps and quizzes. All data is stored locally for privacy.
What's New in Epicycle
1.3.0
October 26, 2026
Find your first little wonder in the night sky. - Follow a guided journey from Tonight to the sky map, with directions and a simple observing tip. - Save favorite observing places and return to your chosen city or custom location when you reopen the app. - Keep an offline My discoveries collection of the objects you've seen, with the time and place of your first observation. - Plan an evening with approximate viewing windows for bright stars, the Moon, and planets, using offline city search or your own coordinates. - Try ten-question space quiz rounds at Explorer and Astronomer levels, with explanations for every answer. - Enjoy clearer large-text layouts and easier-to-tap discovery cards. Still free, offline, and without accounts or ads.
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FAQ
What is Epicycle?
Epicycle is a free astronomy companion app designed for curious explorers and families. It allows users to learn about the sky at home, in a classroom, or outdoors without requiring accounts, ads, subscriptions, or in-app purchases.
Does Epicycle have ads?
No, Epicycle is ad-free. The app is designed to provide an uninterrupted learning experience without any advertisements.
Can I use Epicycle offline?
Yes, Epicycle works offline. Learning content, the quiz, and the sky map are all accessible without an internet connection, and no camera or location permission is needed for these features.
How does Epicycle track discoveries?
You can save favorite observing places and record your discoveries with the time and place of observation. Your collection of discoveries is stored locally on your device.
What educational content does Epicycle offer?
Epicycle provides educational cards for the Sun, Moon, planets, and all 88 constellations, including their guide figures, stories, and modern astronomy facts. It also includes a searchable star catalog.
What is the age rating for Epicycle?
Epicycle has an age rating of 4+. It is suitable for younger users with adult supervision, encouraging exploration and learning about space science.
How often is Epicycle updated?
The latest version of Epicycle is 1.3.0, which was last updated on October 26, 2026. Updates are released to improve functionality and content.
What devices support Epicycle?
Epicycle is available on supported iPhones and iPads. It can utilize device sensors like the camera, location, and motion sensors for an augmented reality sky overlay on compatible devices.
