Investing money through FreeCharge in 'Smart Saver Fund' is a great way to get potentially higher returns on your idle money.
Freecharge will invest your money in Liquid funds which can grow your money faster than most savings A/c or FD. Liquid funds invest in low risk or moderately low risk debt and money market instruments.
You also have the facility to redeem the invested amount instantly to your bank A/c.

Through Smart Saver Fund of FreeCharge, your money is invested in  Reliance Liquid Fund - Treasury Plan - Growth
The past performance of this fund can be checked on this link:
https://www.reliancemutual.com/FundsAndPerformance/Pages/Reliance-Liquid-Fund---Treasury-Plan.aspx