Flash Math Cards runs completely locally on your device (phone, tablet, computer) and does not communicate in any way with any server or other device.
Flash Math Cards does not collect or track any information about users, does not show any ads, and does not charge money for use.
Flash Math Cards stores local settings on your device related to how you use the app, for your convenience. You can access all these settings in the Settings card in the app. It also stores its resources locally so it runs even when offline.
Flash Math Cards is just a free app built to help you practice math skills, that's it, nothing more. So enjoy!