Follow the steps to download the app and start playing after registering your account.You will get an sms on your mobile number with a link to download the app.Enter your mobile number in the prompt and click on 'get app link SMS.'.To download the Big Cash real money-winning app to play cash games, you can follow these general steps. If you are someone who loves card games, someone who loves playing casual games, or someone who loves playing board games, Big Cash has something for everyone. Big Cash app offers games which you can play anytime, anywhere and also win real money prizes.