F Numbers

by C-Spec · Tools · Free

On Google Play since June 2024 · Data updated 2026-10-22

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.

AppBrain's verdict

Niche

Total installs: 2.2 thousand
Last updated: July 29, 2026

F Numbers is a niche app, with 2.2 thousand installs. It doesn't have enough ratings yet to judge what users think.

Download on Google Play

Installs

Tracked by AppBrain

Last 30 days: 56
Play install range: 1+ thousand
Launched: June 2024

Installs over time

F Numbers has been installed 2.2 thousand times. Over the past 30 days, it has been installed 56 times.

Rankings

Google Play top charts

Google Play Rankings for F Numbers

This app is not ranked

Competitors

Similar apps and more from C-Spec

Alternatives to F Numbers

Releases

Updates seen on Google Play

Version: 2.2.1
Launched: June 2024

Jul 29, 2026UpdateVersion 2.2.1
Aug 28, 2025Installs1,000+ installs
Mar 13, 2025Installs500+ installs
Sep 10, 2024UpdateVersion 2.2
Aug 15, 2024Installs100+ installs

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User feedback

Ratings and reviews on Google Play

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.

Technology

Found in the app by AppBrain

Ads: No ads
Price: Free
Libraries: ?
App size: 4.13 MB
Content rating: Everyone

Technologies used by F Numbers

3 permissions

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About the app and developer

About F Numbers

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

How many times has F Numbers been downloaded?

F Numbers has been downloaded 2.2 thousand times. In the last 30 days, the app was downloaded 56 times.

What is the rating of F Numbers?

F Numbers has no ratings yet.

Is F Numbers free?

F Numbers is free. The APK size is 4.13 MB. The latest APK 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 APK has been available on Google Play since June 2024.

App Performance Report

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Developer information for C-Spec

C-Spec

m@cspec.com

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Store listing

By C-Spec, from Google Play

“Quick lookup of filler metal groupings”

Screenshots by C-Spec, from the Google Play listing

Description by C-Spec Written by the developer, not by AppBrain. Click to read.

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.