# RT Helper — NDT Radiography Assistant

> NDT Radiography Assistant (iPhone/iPad app by Dzmitry Dubovik.)

- Source: https://appshunter.io/ios/app/rt-helper/id6755742319 (this page in markdown: same URL + `.md`)
- Developer: [Dzmitry Dubovik](https://appshunter.io/developer/1856006530)
- Category: Productivity
- Price: Free with in-app purchases
- Age rating: 17+
- Requires: iOS 15.1 · 62 MB
- Languages: American English
- Released: 2026-01-18
- Data updated: 2026-08-06
- User reviews in markdown: https://appshunter.io/ios/app/rt-helper/id6755742319/reviews.md

## What is RT Helper?

RT Helper is a professional mobile tool for industrial radiographic testing (RT).
It helps inspectors perform exposure calculations faster, avoid common mistakes.

RT Helper supports both X-ray tubes and the most common isotopic sources (Se-75, Ir-192, Co-60).
Designed by an experienced NDT specialist, the app focuses on accuracy, usability, and real field requirements.

FREE VERSION FEATURES

• Exposure time calculator for Se-75, Ir-192 and Co-60
• Exposure time calculator for all available X-ray tubes
• Voltage and IQI selection based on material and thickness
• Up to 4 customizable presets for quick switching between parameters
• Built-in exposure timer with sound notification

FOR WHOM

RT Helper is created for:

• RT Level I–III inspectors
• NDT technicians working with film radiography
• Students preparing for RT certification

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| RT Helper PRO – Monthly | $6.99 | per month |
| RT Helper PRO – 3 Months | $17.99 | per 3 months |
| RT Helper PRO – Yearly | $49.99 | per year |
| RT Helper PRO – 6 Months | $29.99 | per 6 months |



## Version history (last 5 releases)

### 1.8 — 2026-08-05

Removed the paid subscription and its functionality.
Added dependence of voltage selection on thickness.

### 1.7 — 2026-05-12

Added to the settings:
- measurement units: inches and GBq;
- default parameters.

### 1.6 — 2026-04-27

• Added 27 new X-ray tubes — now a total of 125 models from leading manufacturers including Comet, YXLON Copenhagen, ANDREX aps, Waygate Technologies, General Electric, Teledyne ICM, Balteau NDT, Rigaku, and Spellman High Voltage, GILARDONI.
• Added export functionality for inspection object and weld photos.
• Fixed an issue with logo display in generated reports.
• Improved stability when switching between presets.

### 1.5 — 2026-04-22

• Added 37 new X-ray tubes — now a total of 98 models from leading manufacturers including Comet, YXLON Copenhagen, ANDREX aps, Waygate Technologies, General Electric, Teledyne ICM, Balteau NDT, Rigaku, and Spellman High Voltage.

• Improved exposure setup: tube current is now selected from a predefined list and automatically limited according to the power and voltage of the selected X-ray tube, enabling faster input for exposure time calculation.

### 1.4 — 2026-04-08

Improved  the photo editor

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*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 2026-08-06.*