Pro:Sudoku Privacy and Data Collection Policy

The purpose of this document is to inform visitors regarding the policies with the collection, use, and disclosure of Personally Identifiable Information (PII) of users who use the Pro:Sudoku app.

PII is defined as any information that can be used to identify an individual, either directly or indirectly. This definition is broad on purpose, and includes information such as names, email addresses, IP addresses, usernames, tracking identifiers, internet cookies, and etc.

This document displays information as pertinent to the present date, but may be updated in the future to reflect changes or clarifications to the respective policies. Any changes shall be listed in the changelog below.


2020-11-02: First version published.

Data Collection and Use

Pro:Sudoku does not collect or use any user PII – either directly or via third party services – for the purposes of tracking, analytics, user segmentation, marketing, or any other purpose not directly related to providing the service Pro:Sudoku is designed to provide.

Pro:Sudoku does not disclose user PII with any third parties for any purpose.

Pro:Sudoku will store PII related to handwriting inserted by the user onto the app for the strict purpose of displaying that handwriting back to the user. Once a gameplay session is ended, thus ending the necessity of storing the handwriting data, it will be deleted from the user's device.

Users who install test versions of Pro:Sudoku using TestFlight have the option to share PII about character recognition that was not correctly identified by the recognition software built into the app with the developer for the strict purpose of improving the handwriting recognition software employed by the developer on Pro:Sudoku. If the user chooses to share that data with the developer, it will be transmitted to a server on the internet that strips that data of any directly identifiable information (such as IP addresses or any other identifiers) and stores this data temporarily. This data will then be downloaded by the developer and employed into the handwriting recognition software, upon which it will be deleted from the internet server. This data will not be shared with any other party for any other purpose, and once it's usefulness is deemed no longer relevant, it will be then deleted. This feature is entirely optional and has no impact on the usefulnes of the Pro:Sudoku software, and the decision of sharing this data with the developer or not has no impact on the eligibility of the user on later test or production releases of the software.

Crash Logs

Crash Logs are text files generated by the device when an app closes in an unexpected manner, either caused by a programming error (such as bugs), or other events outside the control of the app.

iOS and iPadOS provide means for developers to receive anonymized crash logs for their respective Apps. As such, crash logs might be made available to Pro:Sudoku's developer related to crash events that happen while you are using Pro:Sudoku. These logs are made available after being anonymized, and only if this feature is enabled on your device.

To check the current configuration of your system, or to change its setting, navigate to “Settings” > “Privacy” > “Analytics & Improvements” > “Share with App Developers”.

Important: Not all information about the user's device is removed. The following information is included in crash log files:

If you would not like this information to be shared to the developer via crash logs, please disable this system feature as described above.

If you believe some part of Pro:Sudoku functionality violates the policies described in this document, please contact the developer immediately via email at me (at) bruno (dot) ph. If you prefer to communicate via a secure medium, a GPG key is available here.