I need an Android & iOS app. I would like it designed and built. this project is for building new Marketplace, target of UI/UX is similar with Ali Express, Shopee, Tokopedia. it will be dummy at first, in this dummy we need the app could connected between seller & buyer, supported tracking system & chat, also support system if the order is not correct. in other hands, if this dummy is success, we will consider to hire you monthly. please bid with best price & sample of portfolio you had.