Hello, HAPPN APP is a GPS, REAL TIME TRACKING based app, the system needs to have a track of all the users so that it could notify the users who have crossed paths, we are experts when it comes to developing GPS, GIS, LOCATION, NAVIGATION and REAL TIME TRACKING based apps. We would like to know the complete idea to understand how you envision your application. We are a renowned mobile app development company, our reviews and our previous works is a good enough introduction of the whole team, the best part is that we are offering you end-to-end services and a turnkey solution. Our question to you is, do you only want UBER taxi service to be integated with your system? and to be very honest giving you an unrealistic time and cost based on vague requirements won't be the right way to move forward but still a ballpark figure would be around $15K and timeline would be around 60 to 75 days. Let me tell you why we are the best choice, well we have an expert team of iOS developers with both SWIFT and OBJECTIVE-C programmers, we have a separate team of UI/UX designers, similarly we have other teams for Android development, testing and QA, project coordination, project management, we follow SCRUM methodology and I would like you to know that a dedicated project manager will be leading your project and giving you updates at all times, we have our own project management portal so that the clients could receive real time updates and provide feedback. Please contact to review our work