iCSC: Clear Sky Chart Viewer
authentic ratingAstrophotographers have trusted it for years as the most accurate cloud forecast for observing, some for over 20 years. They value the quick jump to the local chart and its reliability. It breaks on tiny non-zoomable text on iPad, no search across the site list, no way to launch straight into a favorite location, and colors that make no sense to beginners without a legend.
Many long, substantive reviews from astrophotographers who have cross-checked Clear Sky for 20 years and judge forecast accuracy. Five-star reviews are specific (most accurate forecast, only fooled by coastal marine layers), and criticism is on-point about tiny iPad text and missing search.
What users love
- Most accurate cloud forecast for observing
- Quick access to the local chart
- Reliability and daily updates
- Proven over years
What users hate
- Tiny non-zoomable text on iPad
- No search over the site list
- Cannot launch straight into a favorite location
- No legend so colors confuse beginners
Who it is for
Astrophotographers and observers who need an accurate clear-sky forecast before heading out
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