Validating your app idea is about testing the viability of your idea by testing your riskiest assumption using techniques that allow for initial feedback from users. A risky assumption refers to an assumption you're making about your target user, which you have little information to back up, but is integral to your app solving the problem your users have.

For example, an assumption Airbnb made is that people wouldn't mind sharing their homes with strangers who are traveling.

When you’re thinking about raising money, validating your idea is key to attracting potential investors. They want to know you've taken the time to determine if your app is really what people want. Two common ways to validate an app idea are through the use of a prototype and an MVP.