I built an app in a second-year module, which allows users to register an account and log in with the newly created account.
The hybrid app was also intended to echo textual and image-link data from a MySQL database through Ajax (the screenshots above show echoed content), though I did not succeed in building this functionality into the app before the module deadline.
The following year during spare time, I built another application as an exercise with exactly the same technology.
In the app, image-link and text data were echoed from MySQL; users also can send their email address and a message to a different table through the app.
This time, I successfully built a hybrid app which incorporates this functionality. I used PhoneGap Build to create an APK file from my HTML, CSS and other files. I also published the app on the Google Play Store but have since removed it.