I have a mobile app built on Bubble.io and i'd like to add the ability for users to upload files from their Dropbox (audio files only). Ideally, with the option to upload files by selecting the folder rather than just the individual files. I'd need it to be compatible within iOS and Android operating systems.
I found an App which does almost exactly what looking for (except the folder selecting option).
Here's a screen recording of this app / what I'm looking for: https://drive.google.com/file/d/1xDQFbpqPpJNB8IORT5sdCsmnkQIdN7wD/view?usp=sharing
Does anyone know how this works, if they are using the "chooser" or some other method?