Yes, 99math: Fun Math Practice offers a free version that allows users to access many of its features and games without any cost.

Yes, 99math: Fun Math Practice requires an internet connection to play games and access features, as it is an online platform.

You can contact support or send feedback for 99math: Fun Math Practice through the app's help section or by visiting their official website, where you can find contact information and support resources.

You can manage or cancel your 99math: Fun Math Practice subscription through your account settings in the app or platform where you signed up, following the provided instructions.