iPhone Screenshots


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 5200 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 2.0.4

Minor release to fix:
Screen layouts for devices with 3:2 aspect ratio.
Database includes 5228 Clear Sky Chart locations.
Pop-up menu on Set Nearby Chart Location so it only displays once.

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


Anything Binary
47.1 MB

Requires iOS 6.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating
Rated 4+
© 2016 Anything Binary, All rights reserved.


  • Family Sharing

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

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