Comparison

NDT X vs Protractor for Angle Measuring

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

NDT X

This app provides essential tools for x-ray calculations, including geometric and CT calculations, image viewing, and quality control. It offers explanations for formulas and supports common detectors for easier use.

Highlights
  • TIFF and DICONDE image viewer
  • Geometric calculations
  • X-ray standards support
  • Image quality control
  • CT calculations
  • Formula explanations
  • Detector selection tool
Features
Read full description

NDT X-ray Toolbox is a useful app for x-ray calculations everyday needed. NDT X-ray Toolbox contains: - An image viewer for TIFF and DICONDE x-ray images - Geometric Calculations (Calculation of M, M opt, Ug, Ut) - X-ray Standards (API 5L, ISO 10893-7, ISO 17636-2 including SNRn Calculation) - Image Quality Control (ISO 19232-1 / EN 462-1, ISO 19232-2) - CT Calculations (Calculation of effective Pixel Size, Number of Pictures, Reconstructed Data Size, Best voxel resolution, Tube Voltage) - all Formulas and Shortcuts are given and explained so that if you don't know what a particular Formula/Shortcut means, you can have a quick look in our app, too. We are working on additional features, so it will be updated soon. Also some nice tools are included, e.g. that you can choose, which Detector (the most common Detectors are included) you have, so that you do not have to check out and manually write the Pixel Pitch if you know which Detector you have. Besides NDT X-ray Toolbox is convincing with a modern design that let it make fun to use it.

About

Protractor for Angle Measuring

Transform your iPhone into a precision angle measuring tool. Easily measure angles in real-time using touch or camera modes, and even analyze angles in existing photos. Customize your tools for a seamless experience.

Highlights
  • Real-time angle measurement
  • Touch and camera modes
  • Measure angles in photos
  • Simultaneous unlimited angle measurement
  • Tool color customization
  • Plumb bob pendulum for tilt
Features
Read full description

Your pocket angle expert! Transform your iPhone into a precision tool for real-time angle measurement. Simply tap, snap, and assess angles effortlessly with our intuitive touch and camera modes. Measure unlimited angles simultaneously, customize tools, and enjoy the perfect blend of accuracy and simplicity. Ideal for architects or anyone seeking quick, reliable measurements. Embrace the power of Protractor for fast, on-the-go angle assessments! Key Features: • Touch Measure: Tap the screen to set angles (use the camera view). • Plumb Bob Pendulum: Perfect for determining tilt (calibrate for accuracy). • Angle Measurement in Photos and from Camera. • Simultaneous Measurement of Unlimited Angles. • Tool Color Customization for Visual Convenience. Privacy Policy: https://appliks.com/privacy-policy ​​Terms of Use: https://appliks.com/terms-of-use

Screenshots

NDT X4 screens
Protractor for Angle Measuring4 screens

Verdict

The call

The clearest difference is review sentiment: NDT X at 100% against Protractor for Angle Measuring's 49%. NDT X also leads on rating (5.0 vs 4.5) and in-app purchases (none vs 5). Protractor for Angle Measuring's advantage is ratings volume (1K vs 3). On price, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Protractor for Angle Measuring sells 5 in-app purchases, starting at $0.99 per 7 days. NDT X asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

NDT X holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Protractor for Angle Measuring has 1K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of NDT X's written reviews are positive against 49% of Protractor for Angle Measuring's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 14, 2026 and October 16, 2026 respectively.

Scorecard7 real differences · 3 level
NDT X versus Protractor for Angle Measuring: the parameters behind the verdict, then further details
ParameterNDT XProtractor for Angle Measuring
PriceFreeFree
Rating5.0 (3 ratings) — better4.5 (1K ratings)
Positive reviews100.0% of reviews — better49.4% of reviews
Number of ratings31K — better
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.6
Further details — not scored
Size83 MB112 MB
Age rating4+4+
DeveloperVisiconsult X-ray Systems & Solutions GmbHAppLiks Sp. z O.O.

Customer experience

NDT X

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Protractor for Angle Measuring

All ratings1,023 ratings
Positive88.5%
Neutral4.6%
Negative6.9%
Written reviews77 reviews
Positive49.4%
Neutral5.2%
Negative45.5%

Bugs and requests

NDT X

Not enough reviews yet to summarise bugs or requests.

Protractor for Angle Measuring

Reported bugs

2 issues
  • Protractor tool is hard to use and requires multiple tries
  • Angle measurements do not match real-world angles

Requested features

3 requests
  • Add more instructions and guidance for using the protractor tool
  • Improve the zoom functionality when measuring angles in photos
  • Enhance the accuracy of angle measurements

In-app purchases

None

NDT X

No in-app purchases

5 purchases

Protractor for Angle Measuring

Subscriptions5
  • Weekly Access$0.997 Days
  • Weekly Access with Trial3 Days trial$1.997 Days
  • Weekly Access$1.997 Days
Show 2 more
  • Yearly Access$3.991 Year
  • Yearly Access$4.991 Year

Questions

Is NDT X free?
NDT X is free to download, with no in-app purchases.
Is Protractor for Angle Measuring free?
Protractor for Angle Measuring is free to download, with in-app purchases available.
Which has better reviews, NDT X or Protractor for Angle Measuring?
NDT X is rated higher. NDT X averages 5.0 out of 5 from 3 ratings, while Protractor for Angle Measuring averages 4.5 from 1K ratings.
Do NDT X or Protractor for Angle Measuring have ads?
Protractor for Angle Measuring shows ads; NDT X does not.
Which is updated more often, NDT X or Protractor for Angle Measuring?
NDT X ships an update every 2 weeks, and Protractor for Angle Measuring every 2 weeks. Most recently, NDT X was updated on October 14, 2026 and Protractor for Angle Measuring on October 16, 2026.

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