For most of my career, my iPhone and iPad have sat beside the computer where I work.
They were useful, but mostly for checking Slack, reading email and company documents, or responding to a Jira ticket. There was still an invisible line between checking work and doing it. When I crossed that line, I opened my Mac.
That line has followed the iPad since the beginning. Every few years, the same question comes back: can it finally replace a laptop?
We usually answer by asking it to behave more like one. Give it better windows. Better file management. A keyboard and trackpad. Let more desktop software run on it. The closer it gets to a Mac, the more serious it appears.
But adding more laptop features never fully solved it. Mobile devices still felt like secondary work devices. For me, the reason was simple: the main tool I use to build software runs on the Mac.
But the work around that tool is beginning to change.
More of my day now involves describing what needs to happen, answering questions, checking a result, and deciding what comes next. The files and tools can remain on another machine. My attention does not have to.
I know this because I now work this way.
I built Pi in Pocket for myself. Think of it as my version of Codex on mobile, except it connects to my own Mac and the coding agent running there. My projects and development environment stay on that machine. From my iPhone or iPad, I can start a task, watch the work happen, answer a question, change direction, and review the result.
The Mac still does the processing. But I no longer need to sit in front of a large screen and keyboard to do the work. I can use one when I want to. It is no longer a requirement.
This year, the same idea started appearing in larger products. In May, OpenAI brought Codex into its mobile app. From a phone, someone can start a task, review what changed, approve the next step, and see screenshots or test results. The development setup stays on another computer. OpenAI says more than four million people use Codex each week.
This pattern reaches beyond coding. More work now begins with a request and returns with something to judge. It might be a document that needs editing, some research to verify, or a customer problem to understand. The valuable part is often the decision in the middle, and that decision does not always need a desk.
The iPad has improved too. iPadOS 26 brought better windowing, a menu bar, stronger file handling, and background tasks. Those changes make ordinary work less awkward.
But this shift is bigger than the iPad. A phone can take the same role. We may no longer need either device to reproduce every step of desktop work. The computer can keep the files and run the specialised tools. A mobile device can become the place where we guide the work and stay close to it.
I still like a large screen. Some days I will choose the Mac because the extra space feels good. The difference is that now it is a choice. My work does not have to wait until I return to my desk.
For a long time, mobile devices were companions to work. They kept us informed until we returned to the machine that mattered.
That relationship is starting to reverse.
The Mac can keep doing the heavy work. The main device might already be the one in my hand.