iPhone Screenshots


Now Updated for iOS 13!

Carry your favourite Clear Sky Charts (CSC) in your pocket! Amateur astronomers in North America monitor local sky conditions using the CSC web sites which provide a very detailed 48 hour color coded observing forecast chart for cloud cover, transparency, seeing and other factors. This app contains a database of more than 6000 forecast locations in Canada, the USA and Mexico and can check for new updates. The launch screen monitors up to four or five favourite observing locations. Each square represents one hour and the colors vary from dark blue (excellent) to white (very poor) conditions for observing. A red line indicates local midnight and there is a last updated timestamp. Tapping on any preview chart will open a menu of options that allows you to (i) see a more detailed chart with legend, (ii) map the chart location, (iii) open the CSC web page, (iv) select a different chart location to monitor, (v) remove unwanted charts or (vi) share one of your charts via email, text message or social media. Locations Services can help you find nearby CSC locations when you travel.

Refer to Attilla Danko’s excellent CSC web site home page for complete details on interpreting the preview and detailed charts:


A complete PDF user manual is available on my website:

http://anythingbinary.com/iphone/myCSC/myCSC iOS User Guide.pdf

This app is no longer free. A portion of every copy purchased will go to Attilla Danko to help support the ongoing operation of the Clear Sky Charts site.

What’s New

Version 2.0.6

Updated for iOS 13. Implements auto layout to fit all iPhone screen sizes better. Contains latest CSC database.

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

Mattonthemoon ,


Great for planning a night out observing the stars!

Arcesius ,


This app shows a options screen in its screenshots, but I can't find one. Been swiping and tapping, and nothing. It's useless to me if I can't get a forecast for my area.

Knippenberg ,

Awesome app

Very very good app a must for us amateur astrnomers

App Privacy

The developer, Anything Binary, 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.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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