> And yes, iOS allows 3rd party apps but not nearly with enough permissions to act as a full Messages+iMessage alternative.
Not an Apple user, but I imagine even though there's some allowances for third party messaging, there's a lot of holes. For instance, what happens if I ask Siri to send a message to a specific contact from my Apple Watch. Will it send it over Signal if I've added a Signal address to their contact card and went the mile to set that as the default messaging app for that user? Curious.
While I don't mix text and voice control that often myself, it appears to be fully supported: https://faq.whatsapp.com/1803878309981730/?locale=sv_SE&cms_... as for what actions an app supports, that appears to vary based on what the developer included.
Not an Apple user, but I imagine even though there's some allowances for third party messaging, there's a lot of holes. For instance, what happens if I ask Siri to send a message to a specific contact from my Apple Watch. Will it send it over Signal if I've added a Signal address to their contact card and went the mile to set that as the default messaging app for that user? Curious.