I compared the readings from this app to my GMC-300E geiger counter and the readings were accurate within a margin of error +/- .003 given a top end cpm count of 2000 or 50 mR/h. I duplicated these results 12 times over 3 hours. I took the advice of other users and placed 2 black duck tape strips over the camera so only gamma rays could penetrate to affect the sensors. This is very accurate and I would absolutely recommend this product.
This is nice. I served in the US Army on my NBC team and I can verify that this works. I tested this with my smoke detector and some fly ash and it it worked similarly to the radiation detectors I used in the army. BTW. My phone is a ZTE Warp 7 and I use the rear camera with some foil sandwiched between two pieces of electrical tape mounted under my protective case for my phone.
Not a novelty! Not sure on accuracy or sensitivity but it worked a treat. My wife had treatment where she took radioactive iodine for a thyroid condition and the count showed at least 20 times the amount of back ground radiation near her throat as expected. I placed a small layer of aluminium foil held over the lens by tape. Make sure no light gets in i.e test background count with and without a light shining on it.
I Love It!! Rolf is a genius. I've wanted a working rad counter since I was a boy. Definitely responds to an old radium dial watch. My Galaxy Tab A 9.7" SM-T550 Android 6.0.1 tablet is not on the calibration list, maybe it will be added someday. :-)
Good app, I test it with x-Ray Gama and is working. I will like to have the option to run in the background, and to run with the screen off. That will keep down the temperature of the screen and save battery. I wpuld like to kept ithe app runing in background and check it by the end of my day..
IMPROVE use alloy foil piece below black tape to cover, and test with a flashlight. VERBESSERUNG: bitte Tabellen der Telefon-Kalibrierungen einpflegen (Analog der Umrechnungstabellen) sodass man unabhängig von der Homepage die Werte einpflegen kann. Erstaunliche App
new menu button, several internal function update. And currently test url for uploading data (will be provided to test users)
new split modus, for better noise handling with low radiations. Help updates new design. Support for the new OS versions. Less permissions needed.
* higher cover lense level for some phones required.