That's not only Apple, other companies (like Microsoft) were eating their customers, who were providing service that followed their business line. On the one h

That's not only Apple, other companies (like Microsoft) were eating their customers, who were providing service that followed their business line. On the one hand, this is not pretty, on the other hand, this was happening, happens and will happen, so anyone starting business should think of this - that's one more risk to take into account. I think there was a good post on this by Joel Spolsky - if you create app that improves someone else product, the owner of the product soon or later will come after you. Apple probably is not going to extend iOS with capabilities useful for plumbers, so one is safe building app for plumbers, however I would hesitate to build app for runners, as Apple is clearly looking on the health & sports sector.