Offline data entry

This question has kind of been asked a few times with varying answers - I’m just trying to work out the best solution for my particular case…

I want to build a system for people to enter data offline. The users are located in areas where there is, for the most part, no reliable internet. The idea is users would enter data offline then, maybe once a week, go to a location where there is internet. Ideally there would be functionality to upload data once a connection is established but another idea is to provide the ability for users to simply export data to a CSV which can then be emailed when the users get to internet.

Can this be achieved with Wappler? It seems a PWA or desktop app has potential. Can I use SQLite for this, or is it possible to read/write from/to a JSON data source?

Thanks for any advice.