# F Numbers vs lavnet

The clearest difference is update cadence: lavnet at monthly against F Numbers's every 13 months. F Numbers's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support 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 ships an update every 13 months, lavnet monthly. The most recent releases landed on September 15, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | F Numbers | lavnet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/f-numbers/id929309069/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Monthly** |
| Monetization | Free | — |
| Size | 15 MB | 50 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [ASMEIX CORPORATION](https://appshunter.io/developer/911716652) | [DOSIPER](https://appshunter.io/developer/1743150215) |

## 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


### lavnet

[App page](https://appshunter.io/ios/app/lavnet/id6499311224)

**Features:** 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 lavnet free?

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

### Do F Numbers or lavnet have ads?

Neither F Numbers nor lavnet shows ads.

### Which is updated more often, F Numbers or lavnet?

F Numbers ships an update every 13 months, and lavnet monthly. Most recently, F Numbers was updated on September 15, 2026 and lavnet on October 19, 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.*