These java developers never respond. I tried to install games that payout real cash, but when there was a problem with the technical side, the Google market did not answer anything about those responsible for installing and downloading. Quite a handy app for taking surveys in the form of a chat. That is, you are asked a question, and you write down the answer or choose an available option. Thanks to this, the speed of passage is maximal. As the developers assure you, you will spend on average 5 minutes on testing. But the problem is that my phone does not support such settings, and you have to enter some values manually. When I contacted the market representative, he said that my Internet is off or the ads are blocked. Huh, it was interesting.