# F Numbers vs SSAB WeldCalc

The clearest difference is rating: F Numbers at 5.0 against SSAB WeldCalc's 4.2. F Numbers also leads on ads (none vs shown) and monetization model (free vs ad-supported). SSAB WeldCalc's advantage is iOS requirement (10.0 vs 13.0). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

F Numbers holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 3 and 5 respectively.

F Numbers ships an update every 13 months, SSAB WeldCalc every 9 months. The most recent releases landed on September 15, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | F Numbers | SSAB WeldCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/f-numbers/id929309069/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/ssab-weldcalc/id1439782052/reviews) |
| Number of ratings | 3 | **5** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 13 months | **Every 9 months** |
| Monetization | **Free** | Ad-supported |
| Size | 15 MB | 127 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ASMEIX CORPORATION](https://appshunter.io/developer/911716652) | [SSAB AB](https://appshunter.io/developer/508406943) |

## 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


### SSAB WeldCalc

[App page](https://appshunter.io/ios/app/ssab-weldcalc/id1439782052)

This tool quickly calculates welding parameters like preheat temperatures, heat input, and machine settings. It also provides a risk analysis and allows users to save and share results as PDFs.

**Highlights:** Welding parameter calculation, Preheat and interpass temperature recommendations, Heat input calculation, Welding machine setting recommendations, Risk analysis, Save and share results as PDF

**In-app purchases:** none


## Frequently asked questions

### Is F Numbers free?

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

### Is SSAB WeldCalc free?

SSAB WeldCalc is free to download, with no in-app purchases.

### Which has better reviews, F Numbers or SSAB WeldCalc?

F Numbers is rated higher. F Numbers averages 5.0 out of 5 from 3 ratings, while SSAB WeldCalc averages 4.2 from 5 ratings.

### Do F Numbers or SSAB WeldCalc have ads?

SSAB WeldCalc shows ads; F Numbers does not.

### Which is updated more often, F Numbers or SSAB WeldCalc?

F Numbers ships an update every 13 months, and SSAB WeldCalc every 9 months. Most recently, F Numbers was updated on September 15, 2026 and SSAB WeldCalc on September 25, 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.*