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As featured in Astronomy Now and Sky At Night Magazines!

Double Stars is an astronomy app for hunting down and resolving the beautiful double stars throughout the night sky. The app features a catalogue of hundreds of known double stars, and will identify for you which ones you will be able to see, and when, based on your location and viewing equipment. You can then take the app out into the field to help you locate the double star and record a successful sighting.

Here's what our beta testers told us about the app:

"Great app and I'm loving the filter functions. It makes it so easy for me to decide my targets for the night!"

"What a wonderful app. I had a brilliant time last night seeing double stars in Leo and Bootes, mostly new and some old friends"

"a great app, well designed interface and a unique use for the iPhone's accelerometers and GPS"

Interested? Please read on...

Double star spotting is a pursuit everyone can enjoy with the just the naked eye or with advanced telescope equipment. For centuries, astronomers have enjoyed tracking down these objects and testing their eyes and the limits of their equipment.

Double Stars has a detailed catalogue covering both hemispheres and all 88 constellations. The catalogue covers the key data for double stars; the magnitudes of the pair, the separation of the pair, the positive angle and the location in the night sky. It also notes stars with colour variations and those that form part of a multiple system for 3 or more stars.

Using your location, the time and date, and the details of your observing equipment, the app will filter the catalogue, creating a bespoke list for your location and equipment.

"Smart Tours" automatically create lists of the best doubles each night; your favourites, colour doubles, multiple systems, wide easy pairs, tough split pairs or by constellation. In addition, you can create your own tour.

Out in the field, the app operates in a special night mode allowing you to use it without ruining your dark adapted vision. All the key information you need is present – Double Stars even suggests an eyepiece to obtain the best magnification.

The app also features live Alt Azimuth tracking of the double star for those without GoTo equipment, and uses the inbuilt compass and gyroscope (where available) to point you in the right direction! Try attaching your iPhone to your telescope for precision control. The Sky Tour allows you to record which stars you have resolved. You can add the best double stars to a favourites list for later.

As the seasons change, revisit the night sky each month with Double Stars to see the pick of the delights of each constellation.

We really hope you’ll enjoy discovering and resolving new double stars with this app.

What’s New

Version 2.0.1

Adds the ability to select which data sources make up your star catalogue

Ratings and Reviews

Deer Park dude ,

Great app for double stars

The mini diagram for each pair is great. It would be nice to have one for triples, etc. also. The Tours are a good way to auto-generate an observing list.

Universe Observer ,

Seeing double ...

Nicely executed and refined app for information on double stars and the observation of them. Developers have done a great job of allowing you to pick your favorite double stars to observe during the evening or the app will generate a tour for you based on location, time, and visibility. Thoughtfulness is also exhibited when going into the view mode which automatically shifts to a red screen mode.

For a newcomer, Double Stars provide a lot of value to novice and amateur astronomers. The developers also take suggestions seriously, for instance, opening this app as a universal iPhone / iPad app. My observation work and telescope control are done via the iPad due to the larger screen size. At least it is being considered.

Now ... If we could have a choice between the current Celestron color scheme and one for Meade the icing would be on the cake. Just kidding ... It's the info and presentation that make this app a winner!

Pete1961p ,

Excellent Doublestar Program

Doesn't matter what astronomy apps you already have, here is a superb one that compliments all and serves brilliantly . Quick, simple straightforward with all the info you need to get ubderway wether you have a list planned or not. In the future Id like to see the diffraction patterns color coded for spectral class and more stars under 1" of arc. They are included but for someone looking to specialize sn evening in elongating 0.3" it could prove limited. On the whole, a powerful and handy app for the doublsrar enthusiast seasoned or novice. Compliments the best astronomy apps.


John Turton
1.5 MB
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© JR Turton


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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