You wont believe some of these gainbitcoin scamsters now came with loan scheme. That is you take a personal load to invest in gainbitcoin. These people are taking advantage of greediness of people.
These gainbtc people in maharashtra are targeting tier-3/4 cities like kolhapur, ichalkaranji and of course tier-2 cities like Pune.  with weekly seminars in these cities.  These buggers are now came with their own app, and they declared that they will transfer bitcoins only  their app address. Their claim is this app is most secure and even owner of app(amaze tech/another amit kumar enterprise)  can not touch your bitcoins. 
The app looks ridiculously primitive and without any better feature. I'm highly doubtful how secure it is. And their charges are way to high.

The app link https://play.google.com/store/apps/details?id=info.coinbank.wallet&hl=en