Imagine you're a college student developing a photo messaging app with your frat friends, everyone says it's a terrible idea, and a couple of years later, digital giants like Facebook or Google offer you between $ 3 and $ 4. billion to buy it. but you decline the offer. Another three years and your company is worth $ 20 billion. It may sound like a dream, but it is actually a true story. cost to create chatapp like snapchat also depends on the individual requirements of each course and learning trends. The cost also depends on the efficiency of the developer you want to hire for your project