Help wanted: Looking for technical platform advice for a mobile app

Now working on another app for Brother Promise (Phap The) in Plum Village. This time for his Daily Wellness Enhancement Program (DWEP)
* https://youtu.be/93npxFQqV-8?si=Yu5CJgoypJJKt013
* https://mentalhealthrevolution.org/files/dwep%20sheet.pdf
* https://codeberg.org/tord/dwep/wiki/Home

I'm thinking of making this as a Progressive Web App (PWA). Maybe Flutter could be an alternative. I lack experience with these things, can anyone advice on what would be a good platform? (I've developed on Android but would like for the app to work on iOS too, and maybe even on desktop browsers as a bonus)

What we need:
* System notifications
* Local data storage
* Sharing through email (or in other ways)

I'm thinking that the app will just run locally (in the browser) and that we will not have any server

So far i've been working on it as a PWA in plain JavaScript. If we use PWA then there are various frameworks that can be used though, can anyone recommend a good framework that fits what we need and is focused on purely client-side apps?

#dwep #programming #SoftwareDevelopment #pwa #ProgressiveWebApp