G.E.M. 演唱會App，用手機代替螢光棒，又環保又省錢，睇完G.E.M. 後還可以用到其他演唱會。快些下載試下啦！
除了螢光棒外還包括QR code scanner。
App store:
http://itunes.apple.com/hk/app/x.x.x.-live/id609347135?mt=8
Play Store:
http://play.google.com/store/apps/details?id=com.zizsoft.gemxxxlive&hl=en
There are three colors of glowsticks:
The introduction about the app features by G.E.M.
