Apple Watch Apps That Use the Internal Speaker
All of these 3 apps are unique in that they output through the native speaker of the Apple Watch, which is not something which a lot of apps actually do or have the capacity to do, hope this helps!
Streamlets - https://apps.apple.com/au/app/streaml...
iCatcher Podcast Player - https://apps.apple.com/au/app/icatche...
WatchTube- https://apps.apple.com/au/app/watchtu...