Star Rounds
Light up all 88 constellations
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Stars fill the daytime sky, and the ground beneath your feet. Point your phone, shine a light, and a constellation appears — then travel light years to reach it.
Look up at a blue sky and you see no stars. They have not gone anywhere. The Sun is simply too bright, and the constellations are still right above you.
This app turns your phone into a light. Point it and a spotlight falls on the sky; inside that circle the stars and constellation lines appear. It works in daylight, at night, and straight down through the ground.
Every constellation you light up is recorded in your star atlas. Filling all 88 is the game.
■ Find
"Find Gemini!" Swing your phone around, shine the light, and press when you think you have it. Miss, and a beam stretches to the right answer. All 88 constellations, plus the Sun, Moon and planets.
You can also search by name. Tap ⌕, type in English or Japanese, and a beam points the way.
■ Travel
Fly to the constellation you are lighting. You pass rings of distance on the way: the Moon, the Sun, Jupiter's orbit, Neptune's orbit, Voyager 1, the Oort cloud — hundreds of light years out.
When you arrive, you circle the whole group of stars. The familiar shape comes apart in front of you. It turns out that shape belonged to one single vantage point: Earth.
■ Every star has something you did not know
• The light of Betelgeuse reaching your eye now left the star in 1476
• Rigel truly shines 50,000 times brighter than the Sun, yet from 860 light years it is only magnitude 0.1
• Antares is 296 times the Sun's width — put it where the Sun is and it would swallow Earth's orbit
• Mintaka and Bellatrix are joined by a single line, and stand 950 light years apart
■ Turn time and season
Tap "Six months on" and the constellations now hidden behind the Sun rise into the night. Or move the dials yourself, in ten-minute steps and half a year.
■ No network
Your location stays on the device. Every position is calculated on board, so the app works with no signal at all.
■ Inside
8,404 naked-eye stars, all 88 constellations with lines and boundaries, 333 proper star names, the Sun, Moon and seven planets, distances for 2,368 stars. English and Japanese.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
AR: constellations over your sky, your ceiling, your floor.
• “AR” lays today’s constellation lines over the camera view — daytime sky, ceiling or the floor under your feet. Tap the shutter to share a photo with the lines (photos are never stored)
• One row of tools at the bottom: Search, Which sky?, AR. The Guess quiz is gone, and “Travel to …” sits big in the centre
The developer, Daishiro Hirashima, 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
- Daishiro Hirashima
- Size
- 46.2 MB
- Category
- Education
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Daishiro Hirashima