Hi sir, I don't want to disappoint you but even the mockup for a project of this size will cost you more than 100 dollars. My last project on iOS (current in beta testing) is based on American idol on mobile app and the budget of that project is almost near to my current bid. So, doing a full app for 100 dollars is almost an impossible task. You have the option to pay hourly at 8USD/hr but then also I think the price would be a 20-30 times more. As far as technical things I'll do it on Swift 2.2 with iOS 9 and auto layout. I am fine with REST API and I have a small team of iOS and android developers, I personally do iOS. We do native development only. So, no issues on technical front. You have to pay me when you get to see the work in progress apart from a small initial milestone. So, I'll let you decide and all I can assure is a fair and reasonable price and I expect the same from you.