Does anyone have any experience with message filtering apps on iOS? The app category is generally a pit of data-harvesting crapware, but, there seem to be some that at least seem to be privacy-conscious, open-source, and on-device only. A high degree of trust would be needed for an app with access to messages, contacts, etc.
Example 1: Bouncer
Example 2: Simply Filter SMS
The intention behind deploying a messaging filter like this is for security so the user can, for instance, block links sent by unknown senders. There are tools like Lockdown Mode and the native “Filter Unknown Senders” option which would accomplish something similar, but the former is a bit too hardcore and the latter is a bit too weak (at least for me).