First of all Thanks for purchasing "Ridy Flutter".
To install the solution, you will need a server to host the solution's backend and Admin Panel. A VPS is a good combination of performance and price for hosting Ridy's server side.
For VPS the minimum requirement is 4GB RAM. You will need an SSH client to access your Server's terminal. The whole installation process is done through SSH.
The app is NOT based on PHP so it wouldn't be a good idea to have a server that has a PHP Web Panel (WHM, Plesk, cPanel, etc.) Installed as they consume resources and sometimes interfere with some services the app relies on. It is highly suggested to get a separate server for Ridy with only the bare Linux OS being installed on it.