Get Axis Ace card if you can spend 2L yearly for annual fee wavier. It will give you 5% CB on many payments without extra service charges. Freecharge Plus card on the other hand, is good for insurance payments and utility bills.For electricity bills,freecharge platform charges convinience fee and GST. Overall after all charges you get around 4% cb. But freecharge has only Rs.50k for annual fee waiver. Choose according to your usage.