Discover the wonders visible in your sky tonight.
ASGuide (Astronomy Sky Guide) turns your location and observing time into a personal guide to the night sky. Discover visible planets, galaxies, nebulae, stars, star clusters, and galactic regions. Plan an observation, explore from home, or find your next celestial target.
Find objects worth viewing and learn more about every discovery:
- See what is visible from your location and when to observe it. View rise, transit, and set times.
- Filter by magnitude, altitude above the horizon, constellation, object type, and more.
- Search by common name, catalog number, constellation, object type, or detailed classification.
- Browse the solar system and deep-sky categories.
- Return quickly to recent searches and recently viewed objects.
- See which planets are visible.
- Save favorite objects for future viewing.
- Use your current location or select any location on Earth.
- Check sunrise, sunset, twilight, and night times.
- Follow the current moon phase, illumination, moonrise, moonset, and the next new and full moons.
- Open high-resolution imagery and explore objects with the interactive sky atlas.
Customize the Home screen with the information that matters to you. Use the dark appearance for nighttime observations, or the standard iOS appearance.
Your next night-sky discovery starts with ASGuide.
I forgot I had this app. The easy integration of the various sections of data is good. For its convenience in a small size footprint, the details zooming in on the images is surprising. Unfortunately they don’t have a real website. They use Facebook. I don’t and won’t. Social media has brought ills on the under 30 year olds.
Impressed!
AstroGirlBunny
Fantastic app! Very impressed. Especially since it is free. This is what I needed for planning my observing sessions. Thank you!
Beautiful App!
Entasmiquity
This is a beautiful, stable, well-organized, and easy to use app that helps me plan my skywatching sessions.It reports the current lunar phase and lists notable deep sky objects on display based on your location. This is a big help as I choose Messier objects to check off my list. I like this app so much that I’d like it to do even more to help me plan my viewing. For example, it would be helpful to include solar data (sunrise/sunset), planetary data (where are the “wanderers” this evening), meteor showers, and other celestial events—e.g., conjunctions. Even as-is, this is a high quality app. It is easily worth its current low price, and I would pay $10 for an equally well-designed app that incorporates additional information.
Developer Response
Thank you so much for your feedback! It's been invaluable as a guide of what features to add next. In fact, an upcoming update will include solar and planet info. And definitely researching how to include the rest!
- Fix for Sky Atlas blank screen
- Upgrade Aladin Sky Atlas to 3.8.2 with region mirror support
Version 1.2.2
The developer, Philip Perez, 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 Linked to You
The following data may be collected but it is not linked to your identity:
Location
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Philip Perez
Size
35.1 MB
Category
Education
Compatibility
Requires iOS 18.0 or later.
iPhone Requires iOS 18.0 or later.
Mac Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
