If you are using airtel simcard than you must install this app.whenever you wanat to recharge your number than just open this app.this app will tell you each and every offer best suitable for your number.like if you want best offer for data or talktime or roaming or std this app will help you in all these.one more plus point of this app is that whenver you recharge your number through this app you will be given cashback of 5% .a must have app for all airtel customers.