Runtime lip syncing on mobile devices

For a mobile app, I have a very simple avatar, in the form of an FBX file.

At runtime, I need to feed it text and do lip syncing (audio to face)

All the documentation I find is either about offline lip syncing with complex 3d models (realistic faces) or online (i.e. at runtime) but it seems you need to do that on a proper PC.

Is there anyway to do online (runtime) lip syncing for a simple 3d face model on high end mobile phones?

Thanks!

Have you found any solution?