Giuseppe Parrello


Container Check Digit Creator for Android


This app is able to create or to verify a container's Check-Digit, complying with standard ISO 6346 (Annex A).
Please insert a 10-digits container number (for example XXXU123456) to retrieve the Check-Digit.
If you want to verify an existing Check-Digit, please insert a 11-digits container number (for example XXXU1234561).


Additional Information

Type Updated Current Version Size Requires Android
Stable June 25, 2023 1.13 2.00 MB 4.1 and up



Stable Download here Get it on Google Play Android app on Aptoide Available at Apkpure
Checksum MD5 20cc7d7d45df9f7282d73e15f1658a7b
Checksum SHA-1 fb6ca06f508e54f0c56befdc2650a79cb9e85575
Checksum SHA-256 0c51ed4b3dd53bc8a77b4c09047e8b96e2ca5099ce34b7b1c78ba90058bfa2ea


Important Notice

June 24, 2023 : Version 1.13 of this app is the latest version that supports Android Jelly Bean (Android 4.1, 4.2 and 4.3).
Since the percentage of users still using Android Jelly Bean (Android 4.1, 4.2 and 4.3) is below 0.5 percent, the next version of this app will no longer be compatible with Android Jelly Bean (minimum supported version will be Android Kitkat 4.4).
For the author of this app it is impossible to follow 17 Android versions (from 4.1 to 13), this will allow the author to focus on "only" 14 Android versions, which will become 15 this year with the release of Android 14.
However, the latest versions of all apps still compatible with Android Jelly Bean will remain available on the author's website.
This takes place two years after Google's post "Google Play services discontinuing updates for Jelly Bean" which claimed that Jelly Bean would no longer be compatible with Google services (Google Play Services).

May 19, 2022 : The year 2022 will be a very difficult year for all Android developers. Google has published a policy page that all Android developers will have to respect, which includes the inability to install external APK packages (some well-known File Managers no longer allow this), the inability to access the user's location (and therefore also to GPS), stricter regulations on data security and privacy regulations, increasingly limits to access to device files, an increasingly restricted use of authorizations, up to accessibility restrictions. For no-profit programmers like me, who release free apps, it will be more and more a real risk to continue publishing on the Google Store. For this reason I carry on my apps especially on my personal website, in this case I have more control of the apps I publish, moreover these apps can be updated within the apps themselves (assuming that users may still find a file manager on the Google Store ready to install the APK file provided by me on my website for the first time).


Release 1.13 – June 25, 2023

Release 1.12 – February 26, 2023

Release 1.11 – July 9, 2022

Release 1.10 – March 29, 2022

Release 1.9 – January 12, 2022

Release 1.8a – November 29, 2021

Release 1.8 – November 12, 2021

Release 1.7 – October 12, 2020

Release 1.6 – July 16, 2020

Release 1.5 – December 24, 2019

Release 1.4 – October 20, 2019

Release 1.3 – June 29, 2019

Release 1.2 - January 13, 2019

Release 1.1 - February 19, 2016

Release 1.0 - February 11, 2016

First Release.



Container Check Digit Creator