Is it possible to send push notifications offline on ios and android?

Question

Mobile development

I watch guides on Expo and Kotlin, and FireBase is used everywhere. Is it possible to somehow just send notifications without any problems without all these cloud solutions?

Answer 1

Of course you can. You can from the app itself. It's just not called push notifications, but local notifications.
In android - AlarmManager is used e.g.
Nuance - you should plan them when you turn off the application.