This is the official web app used by the French paragliding and hang gliding federation for its exam to obtain the pilot license. It includes a training mode and an exam mode.
It works on various browsers (Chrome / Firefox / Safari...), thus various OSes (Linux / Windows / Mac OS...)
It is based on angularJS, jquery, and bootstrap (and much more). This app is purely client side, with only static files.
To see how it looks like, you can access the latest stable version at : https://qcm.ffvl.fr/
The Android app is no longer supported.