Starlore — Learn the Night Sky
Log the stars you actually saw
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Starlore is not a planetarium. It is an observing passport: you confirm what you actually saw in tonight's sky, log it, and move up through the stages.
■ Tonight
Astronomical twilight, the Moon, planets, meteor showers and sky brightness (Bortle class) for your location, on one screen. It picks the tasks you can do tonight.
■ Sky
Raise the phone and 80,000 stars, constellation lines, the ecliptic and the Milky Way appear in that direction. If the compass drifts, tap a bright star to align.
■ A six-stage passport
Moon Keeper, Constellation Hunter (15), Planet Tracker, Meteors & Events, Binocular Objects, Messier Silver.
Align a field task in AR, tap Seen, and the time, azimuth, altitude and sky brightness are logged for you. Clouded out? Indoor tasks keep you going: quizzes, simulators and sketch comparison.
■ Observing journal
Equipment, seeing, transparency, notes, photos and sketches. List, calendar and life-list views, with CSV (Astronomical League log-sheet columns) and PDF export.
■ 24 learning cards
Short cards written for ages 10 to 14, from watching the night sky to the solar system, stars and the universe.
■ Red-light mode
Zero white pixels, capped brightness, battery saver. It protects your dark-adapted eyes.
Starlore is fully offline. No ads, no subscriptions, no analytics SDKs, no accounts. Your location never leaves the device.
Stages 0 and 1 are free. One purchase unlocks stage 2 onward, and Family Sharing covers the whole family.
Data: ESA Hipparcos, the Yale Bright Star Catalogue, IAU official star names (CC BY 4.0), IAU constellation boundaries and VSOP87. Images: ESA/Hubble and ESO (CC BY 4.0). Constellation lines, Korean names and all learning text are our own.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Stages are no longer locked behind each other. You can do the free tasks in any order, so if something is well placed tonight, start there.
The field task screen has been rebuilt. “I saw it · Log this” is now the main button and works without AR; AR became an optional tool for finding the direction. There is also a path for nights when you cannot find it.
Tonight's task list now separates what we can calculate from what you need to check yourself. The app cannot see clouds or anything blocking your view, so take a look at the sky before you head out.
The developer, Woosoo Kim, 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
- Woosoo Kim
- Size
- 6.8 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Korean
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Unlock Starlore $4.99
- Copyright
- © 2026 Woosoo Kim

