F Numbers is made and published by C-Spec. AppBrain is an independent app data site and isn't affiliated with C-Spec. The app name, icon, screenshots and description belong to C-Spec and are shown as published on Google Play.

About F Numbers

F Numbers is a tools app developed by C-Spec.

How many times has F Numbers been installed?

F Numbers has been installed 2.1 thousand times. In the last 30 days, the app was installed 35 times.

What is the rating of F Numbers?

F Numbers has no ratings yet.

Is F Numbers free?

F Numbers is free. The app size is 4.13 MB. The latest version available is 2.2.1. The last update was on July 29, 2026.

What are the requirements for F Numbers?

The app has a content rating of Everyone. The app has been available on Google Play since June 2024.

Description by C-Spec (from Google Play)

F Numbers: Quick lookup of filler metal groupings for welding procedure and performance qualification. Lookup includes classifications with respective descriptions of intended use. Data is provided by C-spec. F-numbers and A-numbers assignments are based on ASME Section IX Table QW-432 and QW-442, ASME Section II Part C, AWS B2.1 Table B1 and B2, and AWS A5.1 through AWS A5.36.

Recent changes:
Updated the app to target Android 16 (API level 36) to comply with the latest Google Play requirements.

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More data about F Numbers

Price	Free
Total installs	2.1 thousand
Recent installs	35
Rating	No ratings
Ranking	Not ranked
Version	2.2.1
App size	4.13 MB
Number of libraries	?
Suitable for	Everyone
Ads	NO ads

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Screenshots

Screenshots by C-Spec, from the Google Play listing

Official page on Google Play

Alternatives to F Numbers

Installs over time

F Numbers has been installed 2.1 thousand times. Over the past 30 days, it has been installed 35 times.

Changelog of F Numbers

Show changelog

Developer information for C-Spec

C-Spec

m@cspec.com

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Comments on F Numbers for Android

★★☆☆☆ Alex Rodriguez · Jun 5, 2026

For some reason the app refreshes after making a selection and repopulates the default information... Constant fighting just to make a selection. I have tried to uninstall and reinstall the app but the same problem arises. I would like for C-spec to fix this bug.

Google Play Rankings for F Numbers

This app is not ranked

Technologies used by F Numbers

3 permissions

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F Numbers