Oh. So regretful. It hasn't helvetic fond. I used to using apple devices. Smart and smooth feeling. So as new operator system released. I so much care about. I never jailbreak. Cuz i pay money to buy interested apps and hope developer could create smarter apps. Apps changed ours views. Also devices updated ours habits. From iOS 3 to 7. Although lots of function are useless. AirPlay. iMessage. iTunes. But exactly parts of function gave us whole new experiment in detail. Such as Siri. Smart notice. Panorama of photo taking.  Compass. Some function is nessacry. Like temp. Wind. Direction. The iOS is close system. But it is safe. This change. iOS 7 all symbol to be flat. No skeumorphism. . But u can change ur angel to view it's alteration. Or parallax vision. Tiny change. And 3D vision is secret. Although all of logo hasn't its original feeling. It is a improvement. An overturning.