Knife Steel Composition Chart app icon

Knife Steel Composition Chart

Knife Steel Composition and name cross-reference database.

ZviSoft · zvisoft.stlchmob

Not rated yet 100K+ downloads v3.99.7 943.3 KB Android 2.2+ PEGI 3 · Everyone

  • Signature matches the Google Play version Details

At a glance

Latest version
v3.99.7 (44)
Updated
Sep 29, 2026 (10 days ago)
APK size
943.3 KB
Requires
Android 2.2+ (API 8)
CPU support
Any (no native code)
Category
Books & Reference (app)
Listed since
Mar 23, 2023 (at least)
Permissions
4 (2 sensitive)
Website
zvisoft.com
Developer contact
[email protected]

About this APK

Knife Steel Composition Chart is an app by ZviSoft in the Books & Reference category, listed since at least March 2023. It has no native code, so it runs on any Android processor.

Since version 3.99.3, the APK grew from 780.7 KB to 943.3 KB. It asks for 4 permissions, 2 of them sensitive: read shared storage and modify shared storage. It asks for the same permissions as version 3.99.5.

What's new in v3.99.7

Added support for modern system file picker and bookmark migration from legacy app versions. Added predictive back gesture navigation support on Android 13+ in steel detail view. BugFix: Fixed database synchronization fail with 400 error code. BugFix: Restored missing activity title bar in Steel Browser view on modern Android versions. BugFix: Restored missing title bar and improved legend button placement in Composition Graph view. BugFix: Added missing All selector in Maker Choice View.

Description

From the listing uploaded by “appupdater”.

Knife Steel Composition and names cross-reference database. It is NOT a game, nor a steel history book, nor a knife maker catalog, nor an engineering manual. If you have relevant information, please share with me and I'll publish it. Includes popular, exotic and high-end alloys used in knife blades. Over 6637 alloy names, over 1046 compositions. Alloy names for 21 different national standards, proprietary names and their equivalents. Easy composition comparison with bar graph in 3 modes: mass percentage, molar masses and atomic count per 1000 atoms. Supports Bookmarking of the alloys, including bookmarks export/import, listings by multiple criteria including Standards, Technologies, Makers, Countries, Recently Viewed, Bookmarks, and custom search filters. Explanation of the alloying elements effects on steel is included, accessible from both, steel detail and graph views. Permissions: Storage Access - To import/export bookmarks; Network Access - To synchronize the device with zknives.com central db; Connectivity - Testing connection availability prior to sync attempt; App needs 2mb space on the device, regardless of install location!!! Sorry, there will be no translations to any language. I am one person collecting steel data and coding the app on 3 platforms. I have neither time nor resources to keep constantly translating large database. You can help by reporting missing alloys, and incorrect info. That's a lot more helpful than leaving utterly useless "I didn't find what I wanted" comments, what do you expect me to do anyway, dream up what was it you didn't find? 99% of the times people are mixing up knife brand names with steel names, I can clear that much up if anything else. App is no longer distributed in Russia, due to the excessive amount of complaints and bad ratings, all because I can't translate to Russian, even though app's Russian description did explain why I can't.

Version history

3 versions are listed, going back to v3.99.3.

All 3 versions

Security & authenticity

Security rating: Trusted

Signing certificate

  • Signature matches the Google Play version Checked by the source store on Sep 29, 2026.
  • Certificate issued to “ZviSoft” This is the certificate of the Google Play version.
  • Same certificate as the 2 other versions checked

Store checks and file details

  • Developer signature verified Sep 29, 2026
  • Validated against Google Play Sep 29, 2026
  • Signed byCN=Unknown, OU=ZviSoft, O=ZviSoft, L=Cupertino, ST=CA, C=US
  • Signing certificate (SHA-1)8F:73:E1:6A:78:41:9E:3D:4F:08:54:85:53:2F:25:E4:D7:75:E9:A5
  • File MD507272952d9e3c813bf2e240973895301
  • Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (4)

Knife Steel Composition Chart requests 4 permissions, 2 of them sensitive.

Required hardware & features

Knife Steel Composition Chart APK: questions and answers

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Knife Steel Composition Chart APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is 07272952d9e3c813bf2e240973895301.

Tags

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