

IPhone OS 1.1 was the first version supported by the first generation iPod Touch. It also lacked support for third-party native apps, and only supported web apps, which was criticized by reviewers and developers, including John Carmack. IPhone OS 1 was criticized for its lack of support for Adobe Flash web content, copy and paste, and Bluetooth stereo headphones. A number of different user interfaces were prototyped, including one that involved a multi-touch click-wheel. Many on the team were skeptical of the feasibility of a touchscreen keyboard, and believed that users would prefer hardware keyboards. During the development phase of iPhone OS 1, "probably 16, 17 different concepts" were developed. No official name was given when the iPhone was released, and Steve Jobs just said "iPhone runs OS X".


But in my experience that's not too common apps usually work just fine.Apple announced iPhone OS 1 at the iPhone keynote on January 9, 2007, and it was released to the public alongside the first-generation iPhone on June 29, 2007. Most of them will work, but sometimes even once you have the app installed on your it still won't run correctly. This method should at least allow you to have most apps on your outdated device. You'll get a message that says "The current version requires iOS 6.1 or later, but you can download the last compatible version," just hit Download. If the iTunes on the computer and your iPad are both signed into the same Apple ID, and the iPad is connected to the internet, then go on your iPad/iPhone to App Store -> Purchased -> tap on an individual app you want to install. Then go to the iTunes store and download all the apps you want to be on your iPad/iPhone. Go onto your computer (it doesn't matter if it's a PC or a Mac) and open the iTunes app. On your old iPhone/iPad, go to Settings -> Store -> set Apps to Off. Here's the easiest way to download apps onto an old iPhone/iPad that doesn't support downloading apps through the App Store (if you're getting an error that you need a greater software version to download): The only workaround for now is to install a precedent version of iTunes (see this answer) and follow the rest of this answer. Now that iTunes can not manage Apps, you’re not able to side load them over USB. ITunes 12.7 or later makes this answer into a no - you can’t do it.
