Hey, I am kind of stuck… I want to make a flashcards app where you can upload already existing Anki cards (.apkg files) and get them integrated with my database. Unfortunately I didn’t find any solutions yet so I am thankful for every help I can get 
It won’t include all of the features (such as pictures and sound files), but you can export decks from Anki as text files. Those should be easier to import into Bubble.
FYI, this page explains the contents of the .apkg file format: anki-cards-web-browser/documentation/Processing Anki's .apkg files.md at master · SergioFacchini/anki-cards-web-browser · GitHub
Hi Andy,
To handle data imports from this file type will require a custom plugin. If you’re interested, send me an email at jonah@floop.app and we can discuss making something for you. Depending on what you want, I expected this should take me a few hours (70 US / hour) so roughly 200 - 300 $
If you have experience with code and want to learn how to make a plugin, I offer coaching for that as well.
Have a good day and good luck! 
Thanks for your Input, this definitely helps!