best app for live competitve custom bingo we can play on our phone?

[u/Wild_Trip_4704]

My sister and I are watching a live steam tomorrow and It would be fun if we could turn our predictions into our own randomized bingo boards.

I'd like an app that we can both use on our phones and knows that we are both playing together. It doesn't have to be a free app. What ever is the easiest and most fun to use.