Which SDK to use for Unity mobile (iOS and Android)

Which SDK should I use for a multiplayer game which will be built for mobile devices using Unity 2021+?

I am looking at fusion but I read somewhere that it will not work on Unity 2021+ for mobile? Something that UDP and TCP isn't supported? I just want to clear this up while making a decision on my networking for the game.

Also, the game should be able to handle 50+ players in a small area at once.


  • Of course Fusion supports UDP on mobile. If you can Host a game on mobile and of that makes sense is another question.

    For mobile games, we usually suggest to use Fusion's shared mode or (depending on the game) Quantum, which is used e.g. in Stumble Guys on mobile.

    50 player games will be quite demanding for mobile.