Zebpay is one of the most trusted and oldest bitcoin exchange in India. This is only App based trading platform.
Pros:
1) Their interface is super easy and very much user friendly. Even a simple person with no crypto knowledge would be able to trade here.
2) They have nominal bank charges. Outgoing transfer fees for bitcoin is also very decent starting from Rs. 100/- worth BTC.
3) Good security. Pin lock available. You may also lock outgoing transaction with a lock for extra security. Moreover if you change phone or change sim slots they will prompt you for re login with 2 Factor SMS confirmation.
4) They have considerably fast KYC verification process.
Cons:
1) Only if they start trading other altcoins in their app then it would have been a complete package.
2) Google 2F Authentication may be introduced for better security over and above the present security structure.Hope they have internal cold storage option for saving the bitcoins of investors during a major security breach.