myCSC

myCSC

My Clear Sky Charts

1 ratings
45 reviews
#166 in paid Weather
🔧 Utilities
☀️ Weather
$1.99

Details

  • Released
  • Updated
  • August 4, 2011
  • May 14, 2023

Features

myCSC screenshot #1 for iPhone
myCSC screenshot #2 for iPhone
myCSC screenshot #3 for iPhone
myCSC screenshot #4 for iPhone
myCSC screenshot #5 for iPhone
myCSC screenshot #6 for iPhone
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About

Access detailed 48-hour observing forecasts for amateur astronomers. Monitor cloud cover, transparency, and seeing conditions for thousands of locations across North America. View color-coded charts, access detailed information, and share forecasts.

48-hour observing forecasts
Cloud cover, transparency, seeing data
6000+ North American locations
Color-coded hourly charts
Detailed chart view with legend
Map chart location
Share forecasts via email/text/social media
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What's New in myCSC

2.0.8

May 14, 2023

Bug fix to stop crashes when a site location is no longer supported on the Clear Sky Charts website. Doing a new installation and chart update will clear the outdated sites from the app database. An error message will display if currently selected locations are removed in future.

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Charts

Top Paid

📈 166+4

Weather

This app rose +4 positions in Weather chart.

Last updated on July 21, 2026.

User reviews

Can’t believe I paid for this

It was only two dollars so it’s no big deal but this is a garbage app, a thoughtless interface and design, somebody needs to do this better… also, pretty big slap in the face that there’s a link right to the website in the app, which offers the same information and you don’t have to pay for

Crashes immediately on start with certain charts.

Every time I add my nearest location, Solomons Island, MD, the app crashes immediately. When I try to reopen it, it crashes again making it unusable. It works with other locations, but they aren’t near me.

Not up to date

This app hasn’t worked on my iPhone for years. It literally crashes as soon as it starts loading.

Crashes when deleting charts

I can’t use this app any more because it repeatedly crashes every time I try to delete a chart. It also won’t let me delete the Winter Star Party chart; it keeps coming back. I deleted the app.

Essential for the Amateur Astrophotographer

I have been an astronomy obsessed amateur astrophotographer for three years now. I rely heavily on my phone; there are three apps which I use every single time I set up for a night.. This is one of them. Gives accurate info in an easy to understand format... What more could I ask?!

On those nights where clouds ruin the fun, I often roam the map, salivating over the clear skies of locations far from mine. In fact, every time I travel, this is the first app I open to see what the night sky will hold for me when I arrive!!

It would be cool if the app had some additional features, but none are even worth mentioning because the app is FREE. Considering my other must-have astronomy apps cost embarrassing-to-admit amount, I couldn't be more pleased with myCSC!
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FAQ

What does the myCSC app do?

The myCSC app provides amateur astronomers with detailed 48-hour observing forecasts for thousands of locations across North America. It displays color-coded charts indicating cloud cover, transparency, and seeing conditions, helping users plan their stargazing sessions.

What are the key features of myCSC?

Key features include access to over 6000 forecast locations, color-coded hourly charts from dark blue (excellent) to white (very poor), the ability to view detailed charts with legends, map locations, and share forecasts via email, text, or social media. It also monitors up to five favorite observing locations.

How much does myCSC cost?

This app is a paid application. A portion of each purchase goes to support the Clear Sky Charts website. Specific pricing can be found on the app store listing.

What devices is myCSC compatible with?

Based on the user manual link provided, the app is designed for iOS devices. Users can refer to the provided PDF user manual for detailed compatibility information and usage instructions.

How can I use myCSC to plan my stargazing?

You can use myCSC to check the observing forecast for your preferred locations up to 48 hours in advance. The color-coded charts help you quickly assess conditions like cloud cover and transparency, allowing you to decide the best times and places for your astronomical observations.