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I was doing some studies related to the development of Android, and I came across the following question. How can I send a notification from one user in an application to another in another application.
Example:
A user in a shopping app makes an order, such as sending the notification of that order to the merchant using the app made for sale? What tools should I use?
Use Firebase Notification, Onesignal, Pusher etc
– Valdeir Psr
You can use a platform service, you have Firebase Notification, I use Backendless which is very efficient https://backendless.com/
– Weslley Barbosa