Best 2 digital gold apps in india

Hi, I want to invest in digital gold through apps and below are my requirements.

1. Easy access and without any hidden charges
2. If I want to convert digital gold into physical gold, there should not be much making charges
3. If I want to sell it online, it should allow me to convert digital gold into money without any hidden rules/conditions Please suggest any 2 best apps as per my requirement. Thanks in advance.