Tap And Drill Chart Calculator

Calculate charts for various thread percentages for SAE and Metric screws

Greg A Miller · com.principiaprogramatica.tapanddrillcalculator

Not rated yet 100K+ downloads v4.2.3 1.8 MB Android 4.4+ PEGI 3 · Everyone

Download APK 1.8 MB All versions

Signature matches the Google Play version Details

Tap And Drill Chart Calculator screenshot 1

Tap And Drill Chart Calculator screenshot 2

At a glance

Latest version: v4.2.3 (6)
Updated: Dec 15, 2025 (10 months ago)
APK size: 1.8 MB
Requires: Android 4.4+ (API 19)
CPU support: Any (no native code)
Category: Tools (app)
Listed since: Jun 9, 2023 (at least)
Website: principiaprogramatica.com
Developer contact: [email protected]

About this APK

Tap And Drill Chart Calculator is an app by Greg A Miller in the Tools category, listed since at least June 2023. It has no native code, so it runs on any Android processor.

Since version 4.2.1, the APK grew from 1.3 MB to 1.8 MB and the minimum Android version rose from 4.1 to 4.4.

Description

From the listing uploaded by “appupdater”.

App to calculate charts for various thread percentages for standard SAE and Metric screws. Also shows hex nut size and a diagram with the screw threads to check TPI/TPMM and screw diameter. This app requires no permissions. Please rate this app after evaluating it, it is knowing that people use and love my apps that keeps the truly free app developers producing apps.

Version history

3 versions are listed, going back to v4.2.1. Since v4.2.3 it requires Android 4.4+.

v4.2.3 LATEST Dec 15, 2025 1.8 MB TRUSTED v4.2.2 May 14, 2025 1.6 MB TRUSTED v4.2.1 Jun 13, 2024 1.3 MB TRUSTED

All 3 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Dec 15, 2025.
Certificate issued to “Greg Miller” 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 Dec 15, 2025
Validated against Google Play Dec 15, 2025
Signed byCN=Greg Miller, OU=Greg Miller, O=Greg Miller, L=Greg Miller, ST=Greg Miller, C=US
Signing certificate (SHA-1)DF:33:3E:FA:86:58:6E:D9:F6:BB:1C:07:8E:0E:5D:99:AB:7B:0D:25
File MD55f65a19a98ffdb82189bb223918c0cdd
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.

Required hardware & features

Basic touch input android.hardware.faketouch

Tap And Drill Chart Calculator APK: questions and answers

Is there a version of Tap And Drill Chart Calculator for older Android phones?

The current version needs Android 4.4 or later. Version 4.2.2 is the newest listed build that installs on Android 4.1 and later. Get version 4.2.2 · All versions

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 Tap And Drill Chart Calculator 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 5f65a19a98ffdb82189bb223918c0cdd.