Pregenerate and save results for usage on the go

[wagnerdk]

Hello,
First of all, thank you for your amazing work on this project. Would it be feasible to make the web ui offline usable? I want to listen to some documents that also feature a lot of technical drawings on my smartphone. Because of the drawings an audio export alone is not sufficient. It would be nice if I could run all the heavy calculations on my PC, save the final results (the audio, the PDF, the highlighting and timing information), and then consume them on my Android smartphone.
Edit: The format EPUB3 with Media Overlays for exports is maybe also a good alternative to store this information.