iCSC: Clear Sky Chart Viewer

We have used CSC for over 20 years, and it has been consistently the most accurate forecast out there! Updates occur daily, and sometimes, seems to be more frequent than that. Seldom if ever significantly wrong, and if you want your own map, it is a simple process of uploading your coordinates. My go to whenever considering observing.

The only thing that has ever “fooled” this app in my experience is marine layers by the coast (Seattle, Oregon coast, BC). Otherwise, amazing tool, super accurate and easy to use once you get the hang of the charts and legend. Highly recommended

I had a 10 year old clear sky clocks program that no longer worked when I updated to new phone and latest OS. It easily found locations near me This app only finds a limited number of the Clear Sky Sites available on the website, and you have to know the EXACT naming and wording of the entire clock title. Clear sky locations I’ve used for decades aren’t in this app’s list. Useless, wish I could give it Zero stars.

it may be accurate, but with no key to the charts, who knows what color is what. If you're new to Astronomy, it's pretty much useless.

This version for my iPhone doesn’t allow me to pick/select favorite locations. In fairness the version I have on my Mac works fine.

This is my first, and often only, go-to for astronomical seeing details. It’s fundamentally necessary.

Simple and useful.

This is great weather guide fo clear skies. It is my go to app for star gazing. Very accurate. Highly recommended!

The data isn’t bad, but it is all but unusable on my 5th gen iPad Pro 12.9. Tiny text you can’t zoom in on. MyCSC is a much better choice for iPad users.

It’s nice to have access to accurate, near-term weather data when you’re trying to spot distant galaxies or take night photos. This app makes that possible.