Globally, online business is advanced and popular. In Malaysia, online business is booming as there are a lot of people shops online. People do not have time to go physical shopping whereas with online shopping, they choose what they want, pay online and the items will be sent to their home. People are accustomed to their mobile devices rather than computers. Clothes are the top rank item that people buy online. Nowadays, hijab is well-known and has many designs; the buyers are spoilt for choice. There are difficulties in having mutual agreement among sellers and buyers due to are many hijab sellers. Therefore, ‘Hijabster Mediator Mobile Application’ is developed to become a tool for business matching and minimize risk between seller and buyers of hijab. The method that had been used in the development of this mobile application is Mobile Application Development Life Cycle (MADLC) starting identification phase, design, develop and prototype phase. Initial requirement had been done by interview with sellers and buyers of hijab. Case study of the existing related application had been conducted. Finally a prototype of Hijabster Mediator Mobile Application develop which helps sellers to meet their buyers and the buyers can choose their preferred seller and makes the transaction between them easier.