When should you rewrite your mobile app?

A rewrite bets on longterm priorities:increased speed of iteration ,a focus on a refined end user experience,and quicker ramp up time for new engineers.
For us, a change implied that we needed to redirect the lion's share of our designing group's consideration for four months, since we chose to enhance our APIs and Android requisition in addition to Apple Inc. OS. An iOS 7 similarity redesign, with no compositional enhancements, might have taken several designers not exactly two months.