I am using this app from 1 year and till now I have earned many money from it . This app gives you money for
1.Referring your friends.
2.Installing other apps.
3.By completing challenges.
The money given by this app is not fixed sometimes it gives Rs 100 for referring and sometimes it gives Rs 50 but it give the money that confirm thing and I would recommend this app if you want to get rid of your mobile recharges you can earn from this app.
But this money is for recharge not for bank transfer so read this before you use Mcent.