Use this extension to add a highly scalable counter service to your app. This is ideal for applications that count viral actions or any very high-velocity action such as views, likes, or shares. Since Cloud Firestore has a limit of one sustained write per second, per document, this extension instead shards your writes across documents in a _counter_shards_ subcollection. Each client only increment
![Distributed Counter | Firebase Extensions Hub](https://cdn-ak-scissors.b.st-hatena.com/image/square/35b1519bdac7559c968e234b0add1a28cff4b4a9/height=288;version=1;width=512/https%3A%2F%2Fstorage.googleapis.com%2Ffirebase-extensions-icons%2Fextension_icons%2Ffirebase%2Fdistributed_counter_120%402x.png)