Ad Astra - Star Atlas 4+

Martijn de Meulder

Designed for iPad

    • 4.0 • 20 Ratings
    • Free
    • Offers In-App Purchases


You celestial handbook in an app, all constellations, every astronomer's faithful companion.

An essential tool for every astronomer. The star atlas that makes it really easy to pick the best objects, make your own observation list and use it when you are outside + free Apple Watch app!

Ad Astra contains detailed maps of all 88 constellations, descriptions of more than 1200 of objects: star clusters, planetary nebulae, galaxies, double stars and variable stars. All within reach of amateur telescopes and in a lot of cases, also viewable in binoculars.

If you like an object, just press the + sign next to it to add to your personal observation list. When you go outside at night, use the large maps in the special red night vision mode to find the object and start observing.

Ad Astra covers both the northern and southern skies. And supports both your iPhone and iPad, you only have to pay once to use Ad Astra on both devices!

Ad astra is made for everyone who likes to explore the heavens with a reliable tool. If you are done with planetarium apps and up for some real star gazing, this is your way to go deeper.

Ad Astra has been built upon open Astronomical data. It features deep sky objects up until visual magnitude 12. What do you want to see tonight? Start now.

We received some great reviews from around the globe, just a small sample:

Great app! *****
by rmac500000009 - Version - 1.4 - Jun 19, 2015
Great app if you want to learn the night sky. Better than any book atlas I own.

Ad Astra - A very useful app for the backyard astronomer *****
by Labelme - Version - 1.4 - Jul 11, 2015
Just discovered this very useful app. It brings all the constellations at the tip of your finger. Very nice when observing at the telescope. There are plenty of useful astronomical apps - planétariums, planning apps, etc. but very few atlases and this one is very nicely designed. The free app convinced me to get the Pro version... I suggest you give it a try...

Old school *****
by Smokin' Now - Version - 1.4 - Apr 12, 2015
Reminds me of my old Norton Star atlas, great observing notes and observation list. If you want a good guide to the night sky this is what you want.

We do our utmost to deliver you the best software and data available in the market, but of course we cannot guarantee - nor will we accept any responsibility regarding - the proper functioning or accuracy of both. Data sources can change over time. You can not derive rights from this information. By downloading and using Ad Astra - Sky Atlas you accept these terms.

What’s New

Version 2.0

V2.0 - We have updated the app to support large screens as those in the iPhone XR en XS.
+ Updated the widget lay out to match all screen sizes.
+ Various small bug fixes. Thank you for letting us know!

Ratings and Reviews

4.0 out of 5
20 Ratings

20 Ratings

Solar Engineer ,

Great charts but did not get pro upgrade when purchased

I purchased the pro version add on for my iPad but the iphone version on my iPhone did not get the add on. I guess you have to buy it twice.

I have the XR iPhone. Can I get pro for free since I I bought for iPad?

The charts are excellent because Wil Tirion is the chartist. Wish I could print the charts as needed for current studies and observations in field.

Developer Response ,

Hi Solar, that's weird. Have you tried re-installing the app? Does that fix the problem? If not please let me know at, so I can fix it in the next update.

da-wdc ,


Update in response to developer:
Fair enough. Worthless was needlessly unkind. I apologize, I’m sure you’re working hard on the app. I would find the app useful if I could see the coordinates of objects and if the app allowed me to zoom to just a section of a chart (again while showing coordinates). I’d really love that. I don’t always want the extras of an app like sky safari. Something like this app, nice and streamlined but with the additional features above (and below) would be great.

Original review:
The free version is worthless. Given that the app hasn’t been updated in a very long time (it doesn’t fill the screen on my iPhone X), I’m hesitant to try the “pro” version. The free version gives you a static image of each map. It would be useful if you could zoom and identify the coordinates of objects. But you can’t. You can sort of eyeball coordinates but that’s not the best way to know where to point your scope. (Mine is an old school refractor, no go to mount, just setting circles so don’t go throwing your shade my way about not knowing about astronomy). This is at best a one star app. Two stars in the hope that the pro version is actually useful.

Developer Response ,

Hi da-wdc, *worthless* is a bit brash, don't you think? There's a lot effort invested into building this app and making it correct. It's meant to be a modern version of a celestial pocket book, like Burnham's or Norton's, but in this case in an app. I hope that clears it up a bit. And at least the new update makes the app fill you entire iPhone X screen, in all it's beauty :)

jjts2703 ,

Good entry-level guide

This is a nice entry level atlas for amateur astronomers using binoculars and small scopes. Keep up the good work. Some corrections needed, but generally a worthwhile app.

App Privacy

The developer, Martijn de Meulder, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

More By This Developer


You Might Also Like