Literally for me online payment app that I can always trust is FREECHARGE, it always has top most priorities when it comes to pay my utilities bill like electicity bill and mobile recharges also.
Furthermore mine first online bill payment I had ever made was on FREECHARGE itself and must admit it was very easy, fast and a successful one.
One thing why freecharge is not that famous is less number of cashback offers than other payments app But, now freechage ig growing and gaining popularity rapidly because it has now came up with COUPONS, DEALS, PAY MONEY, UPI and also OFFLINE PAYMENT MODE many more options.
So at last my final advice: If you need an trustworthy and reliable and with a great consumer care service payment app then just go for FREECHARGE.