[samuelg123]

iOS exposes an API for this

Here’s a local keyword filtering app that works great: https://github.com/afterxleep/Bouncer

[elboru]

I use Bouncer, but this should be a functionality given by iOS, I don't feel comfortable giving a third party app access to read my messages.

[sodality2]

It doesn't give the app access to read your messages. The MessageFilter extension that actually handles filtering cannot communicate with any other part of the code nor the network.

https://developer.apple.com/documentation/sms_and_call_repor...