Gamma Calculator Pro Downloads & RevenueGamma Calculator Pro · App Store
Gamma Calculator Pro is #28 in Business Paid in United States and charting in 11 of 30 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
24 Sep 2026Gamma Calculator Pro update history & changes
Last change · 15 events since 5 May 2014Full timeline ↓Full timeline · 15 events
- 📈Gamma Calculator Pro charting in a new countryMalaysia
- 📈Gamma Calculator Pro entered the top 10Top Paid · Business · IT
- 📈Gamma Calculator Pro entered the top 100Top Paid · Business · AU
- 📈Gamma Calculator Pro entered the top 100Top Paid · Business · FR
- 📈Gamma Calculator Pro entered the top 10Top Paid · Business · US
- 📈Gamma Calculator Pro entered the top 100 in 2 chartsTop Paid · Business · GB · Top Paid · Business · IT
- 📈Gamma Calculator Pro charting in a new country in 2 chartsMexico · Turkey
- 📈Gamma Calculator Pro charting in a new countryRussia
- 📈Gamma Calculator Pro entered the top 10Top Paid · Business · KR
- 📈Gamma Calculator Pro entered the top 100Top Grossing · Business · KR
- 📈Gamma Calculator Pro entered the top 100Top Paid · All Apps · SE
- 📈Gamma Calculator Pro charting in a new countrySweden
- 🆕Gamma Calculator Pro first spotted by AppInsider#10 in Top Paid · Business · Canada
- 📦Gamma Calculator Pro version 2.7.1Build for IOS 26
New Percentage Change calculator
New 5mR barricade
New 3exp barricade
New experimental materials:
+ Aluminum
+ Titanium
+ Copper
+ Zinc
+ Brass
+ Inconel X
+ Zirconium
+ Uranium - 🆕Gamma Calculator Pro released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Business PaidGamma Calculator Pro at a glance
AI summary written from our chart and store data, 2026-11-05. It can be wrong: check the numbers above.
Gamma Calculator Pro is a paid utility for industrial radiographers that computes exposure times, geometric unsharpness, and decay rates for Iridium-192, Selenium-75, and Cobalt-60 sources across various materials. The app holds a strong position in the Italian Business Paid charts at #4, while maintaining moderate visibility in US, Korean, and Indian markets, indicating niche regional relevance rather than broad global dominance.
Similar apps: NDT Calculator, Radiography Exposure Calculator, Industrial NDT Tools
Gamma Calculator Pro on the App Store
App details
App privacy Measured
Gamma Calculator Pro declares it collects no data at all — the rarest and most private label on the App Store.
As declared by the developer on the App Store — Apple requires every app to publish this label. We track changes over time.
Gamma Calculator Pro downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Where Gamma Calculator Pro's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Retention · share of new users still active
Time spent · per daily user
How this is calculated
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| United States | BusinessPaid | #28 |
 South Korea | BusinessPaid | #17 |
 India | BusinessPaid | #61 |
| Canada | BusinessPaid | #63 |
 United Kingdom | BusinessPaid | #164 |
 Italy | BusinessPaid | #87 |
 Saudi Arabia | BusinessPaid | #65 |
 France | BusinessPaid | #153 |
 Indonesia | BusinessPaid | #79 |
 Brazil | BusinessPaid | #180 |
 United Arab Emirates | BusinessPaid | #83 |
Apps near Gamma Calculator Pro on the chart
Business Paid, around #28.
Ratings
App Store, worldwide.
Review momentum
ⓘ How we measure thisReview momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about Gamma Calculator Pro
From the 12 most recent App Store reviews in the US.
Long-term users value the app's reliability for industrial radiography calculations but are frustrated by recent iOS compatibility issues and missing data points like R-factors for specific film types. Critical bugs regarding decimal precision in schedule thicknesses and input field usability have led to significant dissatisfaction among professional inspectors.
Mixed but leaning positive (67% of recent reviews give 4–5 stars). People like it for being useful.
What people like
- Useful: “The app works well on IPhone if you know what you’re doing and double checking it”
About Gamma Calculator Pro
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
Latest updates
More from Gerrit kleyn Winkel
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