# F Numbers vs NDT Work Log

The clearest difference is rating: F Numbers at 5.0 against NDT Work Log's 3.5. F Numbers also leads on in-app purchases (none vs 2). NDT Work Log's advantage is update cadence (every 4 months vs every 13 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. NDT Work Log sells 1 in-app purchase, starting at $14.99 per year. F Numbers asks for nothing beyond the download.

F Numbers holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 3 and 6 respectively.

F Numbers ships an update every 13 months, NDT Work Log every 4 months. The most recent releases landed on June 1, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | F Numbers | NDT Work Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/f-numbers/id929309069/reviews)** | [3.5 (6 ratings)](https://appshunter.io/ios/app/ndt-work-log/id1440628096/reviews) |
| Number of ratings | 3 | **6** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 months** |
| Monetization | **Free** | Subscription |
| Size | 15 MB | 23 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ASMEIX CORPORATION](https://appshunter.io/developer/911716652) | [MID AMERICA TESTING LLC](https://appshunter.io/developer/1440628095) |

## 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 Work Log

[App page](https://appshunter.io/ios/app/ndt-work-log/id1440628096)

This app simplifies tracking work experience hours for non-destructive testing professionals. It allows users to log entries for 11 NDT methods, attach details like pictures and work orders, and automatically calculates progress towards certification requirements. Reports can be generated and shared in various formats.

**Highlights:** Log work experience for 11 NDT methods, Add photos, work orders, and notes to entries, Automatically track progress towards certification, Generate reports in PDF, Excel, and Text formats, Share reports via email

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| App Access Subscription | $14.99 | per year |


## Frequently asked questions

### Is F Numbers free?

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

### Is NDT Work Log free?

NDT Work Log is free to download, with in-app purchases available.

### Which has better reviews, F Numbers or NDT Work Log?

F Numbers is rated higher. F Numbers averages 5.0 out of 5 from 3 ratings, while NDT Work Log averages 3.5 from 6 ratings.

### Do F Numbers or NDT Work Log have ads?

Neither F Numbers nor NDT Work Log shows ads.

### Which is updated more often, F Numbers or NDT Work Log?

F Numbers ships an update every 13 months, and NDT Work Log every 4 months. Most recently, F Numbers was updated on June 1, 2026 and NDT Work Log on September 16, 2026.

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