I have an app where I would like to select a user in my contacts. If that person has my app installed, then I would like to send some data that is relevant for this app using a notification. The other user gets the notification, and acts on it within this app. Is that possible? I am thinking that if I can identify that users device, I can store this message in a server. When the user connects to the app, it will retrieve and get this users message from the server. But question is can I identify other devices like this, from my contact list. Can I send this notification using phone number instead of device id?
请提供帮助。
Thank you, Anks