Apple's Software Support Timeline for iPhone 18 Pro and iPhone Duo

Recent iPhone models indicate that Apple tends to extend support well beyond a device's release. For instance, the iPhone XS, XS Max, and XR, launched in 2018, were eligible for the iOS 18 update in 2024, marking their final major release. Conversely, the iPhone 7, released in 2016, received its last major update with iOS 15 in 2021. Additionally, it's crucial to distinguish that major iOS updates are different from security updates, as Apple often continues to provide security patches for older devices long after they have ceased receiving the latest iOS versions.

Considering these factors, both the iPhone 18 Pro and iPhone Duo could likely receive major iOS updates until at least 2031, with security updates potentially lasting well beyond that timeframe. However, the continuation of support ultimately depends on whether the hardware can accommodate the demands of newer software, particularly in terms of processing power and memory.

As devices age, they will eventually stop receiving major iOS updates, resulting in a lack of new features and improvements. Nevertheless, these devices can remain functional for several years without major updates, as Apple continues to release security updates afterward. However, even these will eventually conclude.

Using an older iPhone that no longer receives major updates means users may miss out on the latest app features and necessary security fixes, especially if app developers cease support for older iOS versions. This scenario can pose risks if critical vulnerabilities emerge in applications that remain unpatched.

For current owners of the iPhone 18 Pro and iPhone Duo, there is no immediate concern regarding app compatibility as long as the devices and applications are kept updated.