With the sole exception of email addresses, we do not collect any personal data nor any data that would allow us to identify any particular individual. And we only know your email address in the event that you directly contact us. We do share your email address with any third parties.
Our applications use a third party analytics tool, Google's Firebase, to provide us with a clearer picture of how our applications are used. Typically, we use this statistical data to judge which parts of the applications are being used the most, and how many people are using the applications. This data is collected to help us improve the experience in future releases. This data is collected anonymously, and may be tied to your device ID. The data is not shared, except in aggregate form. And no data about any individual user is shared.
Graph Theorist includes a contact link, which allows users to email us questions or suggestions and tech support. Email addresses, and any identifiable information that may be obtained during these email conversations, are not shared with anyone.