# F Numbers vs NDT Calculator

The clearest difference is price: F Numbers at Free against NDT Calculator's $8.99. F Numbers also leads on rating (5.0 vs 1.0). On ratings volume, ads, in-app purchases and device support there is nothing between them.

F Numbers is free to download; NDT Calculator costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

F Numbers holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 3 and 3 respectively.

## The numbers

| Metric | F Numbers | NDT Calculator |
| --- | --- | --- |
| Price | **Free** | $8.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/f-numbers/id929309069/reviews)** | [1.0 (3 ratings)](https://appshunter.io/ios/app/ndt-calculator/id1619728752/reviews) |
| Number of ratings | 3 | 3 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | — |
| Monetization | **Free** | Paid |
| Size | 15 MB | 18 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ASMEIX CORPORATION](https://appshunter.io/developer/911716652) | [Kenneth Black](https://appshunter.io/developer/1619728754) |

## What reviewers say

### F Numbers

[App page](https://appshunter.io/ios/app/f-numbers/id929309069)

Quickly find filler metal groupings for welding procedures and performance qualifications. Access classifications with descriptions of intended use, based on ASME and AWS standards.

**Highlights:** Filler metal grouping lookup, Welding procedure qualification, Performance qualification data, Classification descriptions, ASME Section IX data, AWS standards data

**Features:** macOS Compatibility

**In-app purchases:** none


### NDT Calculator

[App page](https://appshunter.io/ios/app/ndt-calculator/id1619728752)

This application serves as a calculator for ultrasonic formulas. It provides essential tools for professionals working with ultrasonic testing methods.

**Highlights:** Ultrasonic formula calculations, Specialized for NDT professionals, Simple and direct interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is F Numbers free?

F Numbers is free to download, with no in-app purchases.

### Is NDT Calculator free?

NDT Calculator costs $8.99, with no in-app purchases.

### Which has better reviews, F Numbers or NDT Calculator?

F Numbers is rated higher. F Numbers averages 5.0 out of 5 from 3 ratings, while NDT Calculator averages 1.0 from 3 ratings.

### Do F Numbers or NDT Calculator have ads?

Neither F Numbers nor NDT Calculator shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*