True balance is a nice app. It gives you free recharge. You get 10 if u invite your friend and your friend also get 10 rupees instantly. I also invited 23 friends and also got paid for refer. You can easily use those balance to recharge your number or any phone number.
Also you can earn money by viewing advertisements application downloads etc. It has also credit card debit card and net banking option through which you can add money and recharge too. It also shows your balance and as well as net balance. I think it is an useful app for all.