Before the SDK was released, third parties were permitted to design "Web Apps" that would run through Safari.[134] Unsigned native applications are also available for "jailbroken" phones.[135] The ability to install native applications onto the iPhone outside of the App Store is not supported by Apple, the stated reason being that such native applications could be broken by any software update, but Apple has stated it will not design software updates specifically to break native applications other than those that perform SIM unlocking.[136]