Gamma Calculator Pro vs API 570 Highlights Practices
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gamma Calculator Pro
This app simplifies radiation exposure calculations for industrial radiography sources like Iridium-192. It allows users to input thickness, activity, and distance to determine correct exposure times, and also offers features for geometric unsharpness, exposure correction, and decay calculations.
- Exposure Time Calculator
- Geometric Unsharpness Calculator
- Exposure Correction Calculator
- Decay Calculator
- Barricade Calculator
- Pipe Schedule Selector
- Material Density Calculations
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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
API 570 Highlights Practices
This free version offers a glimpse into piping inspection practices and exam questions. The full version provides over 1000 questions covering all sections of the API 570 Test.
- Practice questions
- Exam simulations
- Covers API 570 test sections
- Free version available
- Full version with 1000+ questions
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This Free version only has several practices and exams questions to show you the general view of the app. The full Exams version includes more than 1000 questions that cover the whole sections of API 570 Test
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Verdict
The clearest difference is price: API 570 Highlights Practices at Free against Gamma Calculator Pro's $3.99. API 570 Highlights Practices also leads on rating (5.0 vs 3.6) and update cadence (every 2 months vs every 5 months). Gamma Calculator Pro's advantage is ratings volume (19 vs 1) and chart position (#10 vs unranked). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
API 570 Highlights Practices is free to download; Gamma Calculator Pro costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
API 570 Highlights Practices holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: Gamma Calculator Pro has 19 ratings behind it against 1, so its average is the more settled of the two.
Gamma Calculator Pro ships an update every 5 months, API 570 Highlights Practices every 2 months. The most recent releases landed on October 11, 2026 and October 15, 2026 respectively.
| Parameter | Gamma Calculator Pro | API 570 Highlights Practices |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 3.6 (19 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 52.9% of reviews | — |
| Number of ratings | 19 — better | 1 |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #10 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 9.1 — better |
| Further details — not scored | ||
| Size | 3 MB | 16 MB |
| Age rating | 17+ | 4+ |
| Developer | Gerrit kleyn Winkel | Nguyen Hieu |
Customer experience
Gamma Calculator Pro
API 570 Highlights Practices
In-app purchases
Gamma Calculator Pro
No in-app purchases
API 570 Highlights Practices
No in-app purchases
Questions
Is Gamma Calculator Pro free?
Is API 570 Highlights Practices free?
Which has better reviews, Gamma Calculator Pro or API 570 Highlights Practices?
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