It does not work on the mobile version :)
In addition, access yoursite.com/photocontests from the mobile version lets the user to try hanging without access to the network until the plugin is disabled.
This is the exact error that is in server logs because debug mode does not work.
[18-Jul-2016 18:48:23 Europe/Madrid] PHP Fatal error: Class 'PHOTOCONTEST_MCLASS_PhotocontestHandler' not found in /var/www/vhosts/somoscd.es/httpdocs/ow_plugins/photocontest/mobile/init.php on line 32
Please correct this quickly because not only prevents you from using the plugin but lets members without access.