Jeremy first idea for yelp failed to get traction and almost failed. He accidentally found that users loved writing reviews and he redesigned Yelp and it took off wildly and made Jeremy a multi-millionaire. Let us see how he did it.
Ehud Shabtai got a GPS and he thought of creating an app. But the maps company blocked him. He came up with a unique solution and Waze became a hit with users and finally they sold it to Google for a billion dollars. Let us see how they did it.