Why can I not install more than three apps?

Question

I have just started learning how to make iOS apps, and am using the free personal developer account.

I have made four apps so far, but do not seem to be able to inst

Answer 1

This is how I solved this issue: I deleted all my test apps in the emulator and on the iPhone. Additionaly, I removed them in iTunes. Afterwards that message disappeared and I was able to build my app.