Application size with ionic framework

Hi everyone,
I am new to Ionic framework and i just build a small awesome app. There is one thing i notice about the size of app. When i create a new blank project and i build, the app size is 3.3 MB. As I add plugins it increases.
But i found a showcase app build with ionic framework (ng-europe by patcito on Google play) the is only 1.4MB. How can I reduce the size of the app.
My app uses a prefille-SQLite DB, check internet access and social sharing is enable. it uses those three plugins and it is up to 3.5MB