Gradus is a free Android app developed by Gradus Research Plus that allows users to participate in national surveys. The app provides an opportunity to answer questions, accumulate bonuses, and use them to pay for mobile connection or exchange bonuses for gift cards. Users can take surveys in their own time and earn bonuses while making their opinions heard and learning new things.

The app offers several benefits. Firstly, a couple of polls per month can help users cover their mobile phone bills or get gift cards. Secondly, the polls are quick and easy, taking up to 5-10 minutes to complete. Users can download the app and take part in surveys at any time and from any place. Thirdly, user opinions are taken into account during important decisions for the country and business. Fourthly, all surveys are anonymous, and Gradus neither stores nor transfers user data to customers. Finally, all surveys are different and often relate to areas of interest such as medicine, advertising, and social issues.