Any application we write or that are showcased here are web applications and not downloadable mobile apps. However you can make them into a downloadable hybrid app whereby the app really behaves as a veiw port (as opposed to a native mobile app which has access to features on your phone like the camera). Because of responsive design (pages that adapt to different screen sizes), our applications work very well on mobile devices.
Our applications are database driven with MYSQL and written in PHP. We also implement AJAX with JSON and XML in many of the features.