# CREDO Detector > Citizen science app for detecting cosmic-ray particles using a smartphone camera. (iPhone/iPad app by Michal Frontczak.) - Source: https://appshunter.io/ios/app/credo-detector/id1598629085 (this page in markdown: same URL + `.md`) - Developer: [Michal Frontczak](https://appshunter.io/developer/1598629147) - Category: Education - Price: Free - Rating: 1.40/5 from 5 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 11.0 · 14 MB - Languages: English - Released: 2021-12-17 - Data updated: 2026-06-11 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/credo-detector/id1598629085/reviews.md ## What is CREDO Detector? What is CREDO Science? Cosmic-Ray Extremely Distributed Observatory (CREDO) — Citizen Science collaborative project which enables a strategy for a global analysis of cosmic-ray data to reach the sensitivity to extremely extended cosmic-ray phenomena, we call them Cosmic-Ray Ensembles (CRE), invisible for individual detectors or observatories. So far, the cosmic-ray research has been oriented on detecting single air showers only, while the search for CRE is a scientific terra incognita. We aim at exploring this uncharted realm. Observation of CRE would have an impact on cosmology, fundamental particle interactions and ultra-high energy astrophysics. A large role in the CREDO project is the CREDO Detector mobile app, which uses the camera's matrix to register cosmic-ray particles. By creating a network of users around the globe, we get a cosmic-ray telescope the size of the whole Earth. All application code is public and available on our GitHub. CREDO is an open Citizen Science collaborative project and all collected data are public. In the project participate schools and institutions from 5 continents. If you think your school should join the program, contact us at contact@credo.science. If you have an idea and desire to implement it, you are welcome to join us! ## Key features - Cosmic-ray particle detection - Global citizen science network - Uses device camera matrix - Publicly available code - Contributes to astrophysics research ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/credo-detector/id1598629085/reviews.md ### 3/5 — So close *2025-01-13* This app works great on almost any version of android, and the overall project is really cool. White screen after login on this iOS version of the app though in 2025. ### 1/5 — Apple reviewed this??? *2023-06-17* Doesn’t register correctly. In continuous cycle of “detecting cosmic rays” and then going back to “register” screen. Can’t understand how Apple lets apps slip by which don’t function at all! ### 1/5 — Cannot register *2023-06-15* When you click registration you get a 403 error ### 1/5 — How do I sign in? Or log in? *2022-03-06* I have been watching the sky. I notice a correlation with cosmic rays and my health. I am really interested in this app. Thank you **Developer response:** Dear Tecpatzihuatl, At the moment app does not provide direct signup. However, you can register on https://api.credo.science/web/register/. More about the project you can find on https://credo.science/. Thank you, ## Frequently asked questions about CREDO Detector ### What is CREDO Detector used for? CREDO Detector is used to detect cosmic-ray particles using your smartphone's camera. This data contributes to a global citizen science project aiming to study rare cosmic-ray phenomena. ### How does CREDO Detector work? The app utilizes the camera's matrix to register cosmic-ray particles. By forming a network of users worldwide, it creates a vast cosmic-ray telescope. ### Is CREDO Detector suitable for schools? Yes, CREDO Detector is an open citizen science project that schools and institutions can join. It aims to involve educational bodies from around the globe in its research. ### What is the scientific goal of CREDO Detector? The project aims to detect and study extremely extended cosmic-ray phenomena (CRE) that are invisible to individual detectors. This research could impact cosmology, fundamental particle interactions, and ultra-high energy astrophysics. ### Is the CREDO Detector app code public? Yes, all application code for CREDO Detector is public and available on GitHub, allowing for transparency and community contribution. ### What devices does CREDO Detector support? CREDO Detector is supported on iPhone and iPod devices, as indicated by the provided data. ### When was CREDO Detector last updated? The latest version of CREDO Detector was released on March 19, 2022, with version 1.0.6. ### Does CREDO Detector have ads? No, CREDO Detector does not contain advertisements, as indicated by the 'hasAds' flag being false. ## Version history (last 3 releases) ### 1.0.6 — 2022-03-19 * Fixed issue with invalid device ID * Added link to the user detections. ### 1.0.5 — 2022-03-14 * Added button to the registration website. * Fixed issue with detections not showing up on the website. ### 1.0.2 — 2021-12-17 No release notes. ## Apps similar to CREDO Detector | App | Rating | Price | Category | | --- | --- | --- | --- | | [DOCTOR - Orbit Visualizer](https://appshunter.io/ios/app/doctor-orbit-visualizer/id1226324311) | 3.0 (1) | Free | Education | | [Antioch Baptist Church of NC](https://appshunter.io/ios/app/antioch-baptist-church-of-nc/id1563856375) | 4.5 (4) | Free | Education | | [Flipboku Apollo AR](https://appshunter.io/ios/app/flipboku-apollo-ar/id1489733327) | 4.7 (3) | Free | Education | | [Bonn International School](https://appshunter.io/ios/app/bonn-international-school/id1608617034) | — | Free | Education | | [Gravitational Wave Events](https://appshunter.io/ios/app/gravitational-wave-events/id1441897107) | 4.8 (118) | Free | Education | | [Wasza Warszawa](https://appshunter.io/ios/app/wasza-warszawa/id1377651475) | — | Free | Education | --- *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 2026-06-11.*