Built an app when the iPhone first came out. Spent 2 months building the core app and another 3 months working to reduce the number of taps and remove road-bump

Built an app when the iPhone first came out. Spent 2 months building the core app and another 3 months working to reduce the number of taps and remove road-bumps in the UI/UX flow. Totally paid off. Working on another app now. Sweating the details on the 'watercourse way.' That first experience is critical.