# Cosmic Ray - Detect Radiation — user reviews

> 10 indexed App Store user reviews of Cosmic Ray by Palmer Andersen Design & Development Ltd., rated 3.67/5 from 9 ratings.

- Source: https://appshunter.io/ios/app/cosmic-ray-detect-radiation/id1169131314/reviews
- App overview in markdown: https://appshunter.io/ios/app/cosmic-ray-detect-radiation/id1169131314.md
- Rating breakdown: 5★ 5 · 4★ 0 · 3★ 2 · 2★ 0 · 1★ 2

## Most critical reviews (10 lowest-rated)

### 1/5 — How high are you

*2023-11-18*

Like seriously

### 1/5 — Not sure if this works anymore

*2021-11-03, version 1.3.3*

This used to work. But I don’t think it works anymore

### 1/5 — Not working?

*2017-04-05, version 1.0*

It launches with the white screen only. I don't know if it works or not? Maybe some "relaunch test" button would be helpfull. But for now it does nothing.

### 3/5 — App need better UI for display of data.

*2019-01-29, version 1.3.2*

Detection is ok I guess but the app’s ability to clearly display the data is badly lacking.   The device & server data needs ways to sort and graphically show the user compared to other in different regions. Thanks for a good start.

### 3/5 — Seemed ok at first now it's does nothing.

*2017-08-22, version 1.1*

First few days it worked great then suddenly to day of eclipse it just shows a white page with no events showing up and past events are not showing up in the cloud.

### 4/5 — Fascinating

*2024-12-07*

I found out about this app from a The Action Lab video. You need to make it so that the system does not calibrate and stay sensitive to the initial amount of light. A user should be able to start the app THEN cover the camera and still see particle trails.

### 4/5 — Very interesting but

*2019-04-19*

Great app. However it is battery consuming very fast

### 5/5 — Question

*2025-01-07*

Could the developer or someone from this app please contact me. I have a couple questions. I’m not sure the best contact method as I don’t want my info on blast. Possibly you could respond with a way for me to contact you. Much appreciated. Jenny

### 5/5 — This app is so cool

*2022-07-03, version 1.3.3*

I love watching the map on the website and seeing my readings pop up. It's too bad that i'm one of two people in the world right now contributing their results to the public. Still though, it's awesome. On a side note, i have a hunch that cosmic particles can be influenced by the mind. Just throwing that out there.

### 5/5 — It good

*2021-06-29, version 1.3.3*

Good just like a good burger from that movie good burger

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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 2026-06-10.*