Audio Only app (and question on audio API)

This can be done with Self-Study Quiz script (on the website), but don’t know of mobile apps, like FD or SD.

I’ve tried a little differently on Anki – not only vocab audio, but also sentence audio, on the front. Not using WaniKani contents, though. Also, it can be a trouble to find sentence with audio if I don’t want to use TTS (i.e. AI voice).