It's possible to create an offline app using flutter

Question

I want to develop offline book reading app using flutter. There is any way in flutter so that user can access book offline.

Answer 1

You can download the images/pdf files of your book in the device storage (External Storage) by asking user like

"Hey! Do you want this to be available offline? Cool, click the button and grant the storage permission in order to proceed".

After this, you can download the files from the server in device external storage and use it. Simple!

Answer 2

you can put data in form of json and load data when you requires it
you can read more about it here

https://flutter.io/assets-and-images/