# Clear Sky Calculator — user reviews

> 1 indexed App Store user reviews of Clear Sky Calculator by Apogee Instruments, rated 5.00/5 from 2 ratings.

- Source: https://appshunter.io/ios/app/clear-sky-calculator/id974693728/reviews
- App overview in markdown: https://appshunter.io/ios/app/clear-sky-calculator/id974693728.md
- Rating breakdown: 5★ 2 · 4★ 0 · 3★ 0 · 2★ 0 · 1★ 0

## Most critical reviews (1 lowest-rated)

### 5/5 — Lots of uses

*2016-01-02*

This product is excellent for applications in addtion to calibrating Apogee instruments. 
 
It is valuable for evaluating small solar charging systems. If the rated output of the solar system is not being achieved, you can use this tool to help determine why. The solar charging system power was determined using an irradiance of 1000 w/m2. The irradaince, for your test location, can be determined by this application if you have a clear day.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*