Star Chart
Star Chart is an astronomy app that uses GPS and a 3D universe model to identify what is visible when you point a device at the sky.
What Star Chart is
Star Chart is an astronomy app that uses GPS and a 3D universe model to identify what is visible when you point a device at the sky. Its catalogue maps over 20 million stars across both hemispheres and includes all 88 constellations, the solar system’s planets and moons, the Sun, and the 110-object Messier catalogue. The listing also says it tracks comets, meteor showers, and satellites live. For exploration, users can take guided tours, use voice control, and shift the view up to 10,000 years into the past or future. They can set a location anywhere on Earth, look below the horizon, and zoom into star fields. Normal use does not require an internet connection. Augmented reality mode requires a built-in compass, while manual scrolling is supported on all devices. Star Chart runs on Android, iOS, macOS, and Windows. Its free plan includes every feature and upgrade, with no subscriptions or paywalls; optional star sponsorship is available. The maker says it has been building the app since 2009.
Good
- Maps over 20 million stars across both hemispheres.
- Includes guided tours and voice control.
- Normal use does not require internet access.
- Free plan includes every feature and upgrade.
- Available for Android, iOS, macOS, and Windows.
Watch out
- Augmented reality requires a built-in compass.
- Google Play reports collection of personal and device data.
Who it suits
It suits curious children and amateur astronomers who want to identify and explore the sky on a phone, tablet, or computer.
Verdict
Star Chart pairs sky identification with a large catalogue and tools for exploring beyond the current view. Its free plan includes all features, though augmented reality depends on a built-in compass.
Plans and prices
From Star Chart's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | Every feature and upgrade included; no subscriptions or paywalls · optional star sponsorship |
The facts
Each one read from Star Chart's own pages, with the date it was checked.
What it does
- AR requirement
- Augmented reality mode requires a built-in compass; manual scrolling is supported on all devices.checked 4 Oct 2026
- Celestial objects
- It includes all 88 constellations, solar system planets and moons, the Sun, and the 110-object Messier catalogue.checked 4 Oct 2026
- Exploration
- Features include guided tours, voice control, and a time shift spanning up to 10,000 years into the past or future.checked 4 Oct 2026
- Intended users
- The listing describes the app as a companion for curious children and amateur astronomers.checked 4 Oct 2026
- Live tracking
- The listing says comets, meteor showers, and satellites are tracked live.checked 4 Oct 2026
- Offline use
- The listing says an internet connection is not required for normal use.checked 4 Oct 2026
- Privacy disclosure
- Google Play reports that the app shares no data with third parties, may collect personal info, app info and performance, and device or other IDs, and encrypts data in transit.checked 4 Oct 2026
- Purpose
- Star Chart uses GPS and a 3D model of the universe to identify what is visible when you point your device at the sky.checked 4 Oct 2026
- Star catalogue
- The app maps over 20 million stars across both hemispheres.checked 4 Oct 2026
- Support
- The listing gives [email protected] for feedback and support contact.checked 4 Oct 2026
- Viewing controls
- Users can view below the horizon, set a location anywhere on Earth, and zoom into star fields.checked 4 Oct 2026
The company
- Founded
- 2009checked 28 Sep 2026
- Headquarters
- Godalming, Surrey, United Kingdomchecked 28 Sep 2026
- Maker history
- The listing says the maker has been building Star Chart since 2009.checked 4 Oct 2026
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