The VRS Simulator can be either used through our online version of the app or by using a downloadable desktop app. Both versions are exactly the same in functionality and features; your programs on the web version will still be stored for your next session. If you are planning to use this simulator in places where internet connection may not be as reliable, it is the better option to download the local app. Programs made on the app can be transferred to the website and vice versa by means of downloading the program and then uploading it to the other version (web to local, local to web).