问题
I intend to develop an simple chat application inheriting the funtionalities of FCM. I would like to know the limits imposed over as it may restrict myself of implementing certain tasks. I would also like to know the number of connections at a given instant and the limit on number of messages could be send from a device?
回答1:
You don't have any limitations regarding an app which uses a Firebase database. If we are speaking about pricing list, it's true there is a free plan, and if want to stay in this plan, you need to have less than 100 Simultaneous connections, less than 1GB stored and less than 10GB/month GB downloaded according to Firebase pricing list.
Hope it helps.
来源：https://stackoverflow.com/questions/44390333/firebase-limits