Yesterday I had a conversation with a mobile app development company to make a clone of the current contacts app. 3 points from 10 mins conversations;

1. They offered me for a working prototype in just 35% of actual app development cost. They'll take 15 days to work on that. ( Me: "Do you mean the prototype that I created in 40 mins using invision and sent you its video recording?" after a little argument they agreed that they meant the same.)

2. They said they will have to embed the complete search engine in the app. (Really!! we never name searching in DB as "search engine")

3. They said they'll take approx 15 days in UI and UX. (Me: "will you change the designs I shared?" They: "It is our internal process, we can't give much detail on that")