For the sake of system security, as Apple's only official AppStore, the App Store's review of the app shelves is still very strict, and the closeness of the ios system is equivalent to dividing a security zone. Of course, you can also cross this safe area, such as jailbreaking, but the security can not be guaranteed, and the opponent's opportunities have many bad effects.

Of course, it doesn't mean that you can only download software in the APPStore. Apps that have been signed by Apple don't need to be put on the App Store. Users can also download and install directly, and there are some assistants answered below. The behemoth store is such an application.

Apple mobile phone introduction:

IPhone is a mobile phone product released by Apple at Macworld Conference held at Masconi Convention Center in San Francisco on June 9, 2007. The front of the iPhone uses a 3.5-inch LCD screen with only one color. The upper part of the back is silver gray, made of aluminum alloy, and the lower part is made of black and plastic.

The width of the IPhone is 6 1mm, the length is 1 15mm, the thickness is1/0.6mm, and the weight is about 135g. IPhone is equipped with Samsung S5L8900 chip and iOS operating system, equipped with a 2 megapixel rear camera and built-in 1030 mAh non-removable battery. Its sales volume is excellent, ranking first among major mobile phone brands all the year round.