# Solar Measurement / PyranometerApp > iPhone app to measure solar radiation in Watts per square meter. (iPhone/iPad app by Hukseflux Thermal Sensors.) - Source: https://appshunter.io/ios/app/solar-measurement-pyranometerapp/id449857438 (this page in markdown: same URL + `.md`) - Developer: [Hukseflux Thermal Sensors](https://appshunter.io/developer/449857441) - Category: Weather, Education - Price: Free - Rating: 3.30/5 from 4 App Store ratings · 9 written reviews indexed - Age rating: 4+ - Requires: iOS 7.0 · 15 MB - Languages: American English - Released: 2011-07-24 - Data updated: 2026-09-04 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/solar-measurement-pyranometerapp/id449857438/reviews.md ## What is Solar Measurement / PyranometerApp? Turn your iPhone into a ‘pyranometer’ with our Pyranometer App. It enables you to measure solar radiation in Watt per square metre (W/m²)! The Pyranometer App 2.0 is a gadget for fun and educational purposes only. Professional measurement of solar radiation is done by highly accurate thermopile pyranometers. These instruments are used for irradiance measurements in weather, climate, solar energy, agriculture and other related fields. The Pyranometer App is provided free of charge by Hukseflux Thermal Sensors, a leading manufacturer of solar radiation sensors. With the introduction of the App in iTunes, Hukseflux became the inventor of the iPhone ‘camera+diffusor’ measurement principle. The App 2.0 has improved iOS compatibility and new, cool features. With the App, our customers, users and other interested people can give a glimpse to family and friends what concerns them in professional life. The App may be used for educational purposes as well. Hukseflux would like to receive your comments: send an e-mail to app@hukseflux.com , titled ‘comment app’. ## Key features - Measures solar radiation (W/m²) - Educational tool - Fun gadget - Improved iOS compatibility - Glimpse into professional solar measurement ## Recent user reviews (9 of 9) All indexed reviews: https://appshunter.io/ios/app/solar-measurement-pyranometerapp/id449857438/reviews.md ### 1/5 — horrible *2026-03-09* Didnt work not one bit. Amost killed me! ### 3/5 — No calibration *2025-10-21* Every time I attempt to adjust the calibration the program crashes. It seems very helpful and promising too bad. This glitch can't be fixed. ### 5/5 — Saved our @ $es! *2018-03-03* Saved the lives and souls of a group of engineering students at a prestigious university when the hardware pyranometers provided for a design class functioned worse than my grandmother’s sense of hearing ### 4/5 — Good educational tool *2013-10-15* I like the app. It can be non-responsive at times but it does the job. I happened to have some guys set up a very accurate solar isolation station outside my office so I could calibrate the app and it gave me a k value of 10.1. I work with PV power systems so it's nice to have a simple way to make measurements. I just have to find an easier way to use the diffuser. ### 5/5 — i need one *2013-06-08* i have the app but how do you get the solar thing for it ### 5/5 — Great *2012-08-09* I am really happy to find this app. Have not played around with it much yet however I look forward to a sunny day and testing or against solar panels output. ### 5/5 — Amazing software *2011-11-13* This is great.. Helping me to calculate PV module for solar farm project. ### 5/5 — Brilliant! *2011-10-18* With 3 layers of white paper over the front camera, this application takes the iPhone and converts it into a fantastic little solar irradiance meter. With my phone and the default calibration constant of 10, the software repeatedly gave results within a couple of percent to that read by a Daystar irradiance meter for irradiance values over 50W/m2. I was unable to print the diffuser as Windows did not know how to handle the file, but found that cutting a long strip of white paper and wrapping it around the top of the phone 3 times worked really well. The readings obtained were far better than simply a "rough guide" and were way within the 30% tolerance suggested by the developers. This app is a MUST for solar designers/installers. Very well done! Thank you. ### 5/5 — Astounding *2011-09-27* It was fun and easy to print the diffuser "lens". Results are surprisingly illustrative. The difference in light level between indoors and outdoors was an eye-opener. A great little app for education. ## Frequently asked questions about Solar Measurement / PyranometerApp ### What is Solar Measurement / PyranometerApp used for? Solar Measurement / PyranometerApp turns your iPhone into a pyranometer to measure solar radiation in Watts per square meter. It's intended for fun and educational purposes, offering a simplified way to understand solar energy principles. ### Is Solar Measurement / PyranometerApp suitable for professional use? No, this app is for fun and educational purposes only. Professional measurement of solar radiation requires highly accurate thermopile pyranometers, which are specialized instruments. ### What devices does Solar Measurement / PyranometerApp support? Solar Measurement / PyranometerApp is available for iPhone and iPod devices. ### What is the age rating for Solar Measurement / PyranometerApp? The app has an age rating of 4+, making it suitable for a wide range of users. ### How often is Solar Measurement / PyranometerApp updated? The latest version, 2.0, was released on November 18, 2015. While it has had updates, the last known update was in 2015. ### Does Solar Measurement / PyranometerApp have ads? No, Solar Measurement / PyranometerApp does not contain advertisements. ### What is the user rating for Solar Measurement / PyranometerApp? The app has a strong user rating of 4.5 stars, based on 2 ratings. ### Can I provide feedback on Solar Measurement / PyranometerApp? Yes, the developers welcome comments. You can send an email to app@hukseflux.com with the subject 'comment app'. ## Version history (last 2 releases) ### 2.0 — 2015-11-18 This update from Apple will improve the functionality of this app. No new features are included. -new, cool features, including data review -improved usability and compatibility with latest iOS ### 1.0 — 2011-07-22 No release notes. ## Apps similar to Solar Measurement / PyranometerApp | App | Rating | Price | Category | | --- | --- | --- | --- | | [My Barometer and Altimeter](https://appshunter.io/ios/app/my-barometer-and-altimeter/id1457983372) | 4.4 (1,091) | Free | Weather | | [Kilowatt Solar Energy Forecast](https://appshunter.io/ios/app/kilowatt-solar-energy-forecast/id1619936236) | 4.1 (10) | Free | Weather | | [Wind Compass](https://appshunter.io/ios/app/wind-compass/id662297095) | 4.6 (22,951) | Free | Weather | | [Sun Quest: Seeker & Tracker](https://appshunter.io/ios/app/sun-quest-seeker-and-tracker/id1607543741) | 4.8 (726) | Free | Weather | | [UV Index: SunWise](https://appshunter.io/ios/app/uv-index-sunwise/id6449424793) | 4.6 (1,074) | Free | Weather | | [Sunlitt: Sun tracker & seeker](https://appshunter.io/ios/app/sunlitt-sun-tracker-and-seeker/id1628751457) | 4.7 (741) | Free | Weather | ## Related topics [pyranometer](https://appshunter.io/ios/topics/pyranometer) --- *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 2026-09-04.*