I am new to ios app development...I want to know the number of iphone required to test my ios app. Suppose I developed an application the it needed to be tested on different ios versions (eg. ios 5, 6 and 7 etc) and also different iphone hardwares(eg. iphone 4, 4s, 5s).
Also I want to know that whether I need a completely separate iphone to test my app on ios 7??