[classicmotto]

If this is a standalone app (not requiring ongoing server/relay maintenances), why charge a monthly fee and not a one-time fee?

[modeless]

They still run a server on your behalf to translate from Apple push notifications to Android ones. Somehow they were able to do it without compromising the end-to-end encryption too, which is awesome.

[abhibeckert]

Why charge $10, when you can charge $10 per month?

But seriously, Beeper does have server side components. They're just optional ones. If you don't pay, you don't get those features.