Apple developers have no choice: iOS 9 is expected to support iPhone 4S

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According to Apple's previous software update schedule, iOS 9 should be announced next month and officially launched in September this year. Now, there are reports that iOS 9 will be more compatible and support products that have been on the market for more than 3 years, including iPhone 4S and iPad mini.

According to 9to5Mac, iOS 9 will not be a major version because engineers have cancelled some new features due to quality and stability concerns. The report pointed out that the version will still have some new features, but much less than previously planned.

Each new iOS release provides a certain degree of support for previous products, but at the expense of performance and stability. For example, after iPhone 4 users upgraded from iOS 6 to iOS 7, the product became extremely slow. In addition, the iPhone 4's screen size and processor did not work well with iOS 8. The optimized iOS 9 should benefit users in developing countries, where the update cycle is generally longer.

Apple developers also have to accept the fact that iOS 9 will support iPhone 4S. For example, the iPhone 4S has a 3.5-inch display and 512MB of memory. Developers need to ensure that their applications still perform well on this small screen and manage memory more efficiently. Since the iPhone 5, Apple has expanded the screen size to more than 5 inches.

There are also rumors that Apple will change the default font, add a Home app for HomeKit devices, launch a split-screen display feature on the iPad, and provide corresponding updates to Apple Maps. When Apple launched iOS 7, the default font was Helvetica Neue, and with iOS 9, the company may replace it with San Francisco. It is also reported that the first batch of smart home devices certified by Apple will be launched next month, and a corresponding Home app may appear on iOS 9 as a control center to manage these devices, such as smart light bulbs, coffee machines or smoke alarms. At the same time, 9to5Mac also reported that Apple is building a 12-inch iPad (codenamed J98 and J99), which will support multi-user login and split-screen applications. Apple Maps on iOS 9 is also expected to have transportation instructions for subways, trains and buses.

Another possible feature of iOS 9 is called "Rootless", which is a kernel-level feature designed for OS X and iOS to prevent the spread of malware and improve system security. Rootless can prevent users with system administrator privileges from accessing protected files on Apple devices. 9to5Mac further pointed out that this move will make jailbreaking more difficult.

Every year, Apple releases news about the next version of iOS at the Worldwide Developers Conference. This year's conference is scheduled for June 8, and people will know more about it at that time. Let's wait and see!