Can a non-standalone/mobile app send private messages on its own behalf to users who have installed it?

Question

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Task: Write an application that notifies the users who installed it in private messages. Those. there is no need to use the extended API to work with user messages, but only the ability to send a message to the subscribed user.

Answer 1

You can't exactly send private messages, but you can use notifications . This is the most normal way to notify users.

Answer 2

Personal no, except for notifications