iCSC: Clear Sky Chart Viewer App Reviews

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.

I’ve been a Clear Sky user for several years - much more reliable than any other tool I’ve used for astronomical forecasting

Great tool. I’m a novice at astrophotography so this app / website is essential. And it is great.

Hands down the best forecast for astronomy…ever

Nice little app to see the weather forecast for observations

Totally awesome

Lots of “seeing” information and forecasts at my fingertips. Helps me plan for an evening under the stars with my telescopes.

I’m generally happy with this app, but would like the ability to enter GPS coords for favorites. “Nearest neighbor” doesn’t work when that closest info point is over 100 miles away.

Concise amalgamation of data!

I use this app all the time. Very accurate for my location (US mid-Atlantic coast).

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.

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

Simple and useful.

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

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

Cloud cover about 50% yet says clear Wagoner, OK

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.