I personally recommend to use Paytm Mobile App because of its unique features. It has a very secure payment gateway system integration.
The first Paytm is concept is to recharge and pay bill of your mobile phones. But while time goes they include very good feature lile online shoping, movie ticket booking, bus-train- flight ticket booking and many more.
The design of the application is very user friendly with easy to use to any application user.
The main feature is you can also recieve a payment from other user of the app and withdrawal in your bank account with easy steps. Also you can pay at anyshop who register with Paytm with your Paytm wallet cash.
Nowaday It is very useful app in India for normal transaction like online shopping, movie ticketing and recharge.