When you have an account in our participation system, you are ready to use our app. All you need to do is install the app and follow a few instructions. 

1. Download the app 'Sona Mobile' in App Store or Google Play
2. When the app is downloaded and installed, you need to enter the following address under "Enter the URL (web address) for your site": aucobe.sona-systems.com, make sure you are not typing any spaces
3. Log in with you username and password
4. Now browse active studies and sign up