App Store

Gamma Calculator Pro

Originator Gerrit kleyn Winkel
Primary Metric 19
Save time with this exposure calculator for Iridium-192, Selinium-75 and Cobalt-60 sources. No more need to calculate the formula or use of the "old-school plastic calculator" Simply fill in the thickness, activity(in Curies) and source-film-distance and you get the correct exposure time. R factor for different densities and film types. For materials: Iron(steel), Concrete, Tungsten, Lead, Aluminum, Titanium, Copper, Zinc, Brass, Inconel X, Zirconium and Uranium. Features: - Exposure Time calculator - Geometric Unsharpness calculator - Exposure Correction calculator - Decay calculator - Barricade calculator - Pipe Schedule selector (single/double wall) - Weld enforcement setting - Iridium 192 Emissivity setting - inch/mm setting
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Developer & User Discourse

IsaacSpangle • Dec 7, 2024 ★ 5
Between this app and another calculator app (x-ray_timer) I would say my whole shop uses this app for anyone that owns an I-phone. What drives me crazy is when you initially want to change the curie amount and the line always starts in the front of the initial number. Just an extra step moving the line to select the initial number and change it. We use this app every week here in Kansas.
fantasyenthusiast • Feb 22, 2024 ★ 4
Can you please add the R factor for D3.

Also could you please make it so that the SFD and other measurements that need to be precise don’t round up or down?
St.holierthanthou • Dec 16, 2023 ★ 4
The app works well on IPhone if you know what you’re doing and double checking it. There are a few mistakes with the schedule thicknesses in the calculator where some measurements are missing decimal places in front so the distance is over a hundred feet.
Totojoe1 • Sep 26, 2022 ★ 1
This thing worked like a dream for years but since the update…it’s junk. Won’t even configure time on iPhone! Fix it or refund my purchase.
yahn2831 • Sep 26, 2022 ★ 5
Love the app, have been using it for years, but as of today the app will not work on my iPhone after the IOS 16 update. Please fix
you mess the app up • Aug 18, 2022 ★ 4
The R-factor for AFGA D3 isn’t listed. I would like to know if this will ever be added or fixed. I love the app, but this is the problem I have with it.
raddude1986 • Apr 10, 2022 ★ 2
App is great for getting shot times.
Now…24” 40s and 24” schedule 40 are 2 different thicknesses.
24” 40S is a .375
24” Sch 40 is a .688
I learned the hard way to figure that one out.
Horror hound 420 • Apr 15, 2019 ★ 5
Use this everyday, best app for X-ray personnel.

I wish the maker of this app would do a code app like b31.3, section 8, api 1104.
branclon16 • Mar 26, 2019 ★ 2
No D3 AGFA in R factor chart everything else is great though. If you could add it that would be awesome!
brandonINKEDup • Jun 27, 2018 ★ 5
An amazing tool for anybody in Industrial Radiography. I highly recommend it.
Matt8man • Oct 19, 2017 ★ 3
I run a LIXI scanner often which uses Gadolinium. The decay calculator will calculate all the listed sources but won't calculate for Gad. What gives!?
Current Level II • Sep 27, 2016 ★ 5
This is worth the money for an on the go industrial radiographer! Better than a slider even though your trusting someone else with your shot times it's never steered me wrong. Great job on the app hope you keep up with the changing of times. Thanks