Mubble is one place solution for all your prepaid issues.
Mubble does following things :

1. Mubble shows best recharge packs which is suitable for your usage and saves money.
2. Mubble gives recharge reminder whenever you have low balance, High rate or pack expiry is near.
3. Manages your SIMs balances and deductions.
4. You can recharge for family/friends members using mubble.
5. You can get your bill on email.