While most Apple users are focused on the newly announced iOS 15, young developer Zane Kleinberg has reworked iOS 4 – which Apple released in 2010 with the iPhone 3G – from the ground up as a standalone app. He calls it OldOS and you can try it out now. “What I created with OldOS is iOS 4 beautifully rebuilt in SwiftUI,” developer told Cult of Mac. “In essence, an app is something like an emulator or perhaps, a second operating system inside an app on your phone. It’s really designed to be a near-working, near-pixel-perfect re-creation of iOS 4.” The fourth version of Apple’s mobile operating system – and the first to be called “iOS” instead of “iPhone OS” – iOS 4 brought notable updates in 2010. It introduced new features. Home screen folder, support for adding custom backgrounds, system-wide spell checker integration and much more. Kleinberg sums up iOS 4 in one word: nostalgia. iOS 4 looks a bit dated these days – as a reminder of how far iOS has come over the past decade. But if you think iOS 4 brings a sense of nostalgia to you, it seems a lot more ancient for 18-year-old Kleinberg. He was 7 years old when it came out. “My first experience with any form of modern mobile technology was iOS 4,” New York-based developer said. “It’s hard to say how special this software holds in my heart. That’s what first introduced me to my passion for app development and technology. I think we all enjoy clinging to a select few childhood memories, and a lot of my memories include this operating system.” iOS 4 running on iPhone 12 A few years after the release of iOS 4, Kleinberg – then in 4th grade – created a homework tracker as the first app on the App Store. Even though that app was no longer available, he didn’t mind. He chose Computer Science when he took the university entrance exam at the end of this year. Zane Kleinberg Kleinberg created OldOS using a combination of legacy assets like icons and other things he had to design himself. He said he’s tried to recreate most of the iOS 4 apps. However, some apps – like Mail, Calendar, YouTube, and Messages – still have “big problems” he’s working on. Apps vary in functionality, with some functioning more fully than others. For example, the Calculator app can do calculations, but the Messages app (which is still active) only shows notifications and the UI. In other words, OldOS is more of an interactive museum than a fully functional operating system. “For months, I had an iPhone 4 running iOS 4 on my desk and used the apps one by one, trying to figure out how Apple designed them, ” I said. “ Since I’m pretty well versed in reverse engineering, I’ll decompile the application binaries and try to see, from a more technical perspective, how Apple built its app. I also found the iOS 4 UI Kits, and was able to put them in Photoshop and have a look.” Other parts of Kleinberg’s OldOS project require different methods. “For apps like Stocks and Weather, which no longer work, I watched YouTube videos, trying to reason as much as I could about the design,” I said. “ It’s just a continuous process of looking at different pieces of stuff over and over, then trying to build it in SwiftUI, and then iterating until I’m happy with that UI element.” Unfortunately, you shouldn’t expect to find this app in the App Store. Kleinberg believes that Apple will not accept the free use of assets owned by Apple. Apple enforces strict guidelines about showcasing its products in apps. “This whole project is a testament to the extraordinary work of the Apple team both past and present,” said Kleinberg. “I just hope this project can convince them to re-evaluate their policies even a little bit.” For those who want to try OldOS, Kleinberg says it can be downloaded from TestFlight, Apple’s developer service for beta-testing apps. Or they can check out his OldOS project on Github.

5. iPhone SE Photo: CNET Maybe not everyone agrees with this point of view, but many technology sites consider the iPhone SE to be a step backward in design compared to other smartphones when equipped with a screen that is too small even though it was released. for those who like this screen size. iPhone SE has some hardware upgrades while its design is not much different from the iPhone 5s. The fact that the price of the device is not low makes the iPhone SE not attract too much attention. In Vietnam, iPhone SE is also one of Apple’s most silent smartphones. It didn’t even get as much attention as the iPhone 5c. 4. iPhone 6 Plus Photo: CNET The iPhone 6 Plus launched in 2014 is one of the most surprising phones in Apple’s history when it comes with a 5.5-inch screen and an ultra-thin body. Perhaps for this reason, the iPhone 6 Plus is prone to… so curved. Many users have said that their iPhone 6 Plus is too easily bent, especially in the volume up and down buttons area even under very normal conditions of use. The case was so serious that Apple itself had to speak up, but at that time “apple defect” asserted that cases of bent iPhone 6 Plus were “very rare”. I don’t know what the truth is, but in the following shipments, Apple is said to have quietly reinforced the iPhone 6 Plus chassis in its weak points. 3. iPhone 3G Photo: CNET Looking back at the first iPhone at the present time, you probably also feel this device… how bad it is. No App Store? No TouchID? Even only 2G connection is supported. All that the original iPhone offered, though, was the starting point of a revolution. However, the iPhone 3G is on this list because unlike the breakthroughs available on the first generation, the iPhone 3G is a step backward because of the trade-off between 3G network and boring body made of plastic. This machine is also said to be prone to cracking and slow performance. 2. iPhone 4 Photo: CNET While the iPhone 4 is loved for its completely new and refined design, there are a few downsides that make it one of the worst iPhones ever. Who could forget the antenna problem on this iPhone? Accordingly, when the user holds the iPhone 4 to listen to the phone, it is highly likely that the user’s hand will cover the antenna located along the side of the device, making the call quality greatly affected. When users complain, Apple does not even admit the fault, but also blames the user for holding the device in the wrong way. Apple finally had to give in by giving iPhone 4 users border cases that could fix the above situation and silently improve the signal quality with software afterwards. 1. iPhone 5c Photo: CNET The idea of ​​an iPhone 5c is not bad: young, dynamic and affordable to reach a wider user base. However, the iPhone 5c is not as competitively priced as expected. Besides, the plastic body of this machine is also considered less luxurious. Some highlights like TouchID are not even present on the iPhone 5c, making this device at the top of the list of the worst iPhones in Apple’s history.