1. 21Twelve Interactive :
21Twelve Interactive offers innovative mobile apps that you need to know about modern technologies to move your business forward in Serbia. The secret of a company’s success lies in the most recent solutions it offers to its customers. Whoever succeeds governs the market. With the number of responses obtained by developing websites in just a few decades, mobile apps have grown in popularity in recent years. Mobile application development is one of those resources that you can use to exploit the online scenario. A company introduces a mobile application to leave the impression of being techno-friendly, new age and dedicated to better customer support. In this rapidly changing world of social networks, no business wants to be left behind.