Apple Watch と watchOS のアプリ開発

作業指示書

• What Apple Watch app development covers

  Watch work runs from adding a companion app to an iPhone product to building one that stands on its own. I take the full native scope: SwiftUI interfaces for the watch, complications, notifications, sync with the phone, and the App Store submission at the end. You can hand over a defined watchOS project or bring me in to finish one that has stalled. Everything is billed at a flat remote day rate, with no agency markup.

• A watch app is used for seconds, not minutes

  People raise their wrist, read one thing, and drop their arm. That constraint decides everything: what goes on the first screen, how many taps a task takes, and what gets cut. Most watch apps disappoint because they try to be the iPhone app in miniature. I start from the one job the app has to do on the wrist and build outward from there.

• Companion apps and independent watch apps

  A watch app can ride along with your iPhone app, or install and run on its own. The independent route means the watch talks to your API directly, handles its own account and storage, and still works when the phone is in another room. I help pick the one that fits your product, because the choice changes the networking, the sync model, and how much the watch has to do alone.

• Complications and the Smart Stack

  The watch face and the Smart Stack are where a watch app is actually seen. Complications are built with WidgetKit, and they have to stay useful on a refresh budget the system controls rather than your code. I set up the timeline, the placeholder and fallback states, and the deep link, so tapping a complication opens the right screen instead of the app root.

• Sync, notifications, and battery

  Watch Connectivity moves data between phone and watch, and it behaves differently depending on whether both apps are awake. I handle the transfer strategy, background refresh, and notification payloads, including the custom notification interface. Battery is part of the design here. A watch app that polls or holds a session open gets noticed by users fast.

• Health, workouts, and sensors

  Many watch apps exist because of what the watch measures. I work with HealthKit for reading and writing health data, workout sessions for apps that need to keep running during activity, and the permission flow Apple requires for both. Health data also brings App Review rules that are stricter than usual, and I build against them from the start.

• Shipping a watch app to the App Store

  A bundled watch app ships inside the iOS app record, on the same product page, so there is no second listing to manage. An independent one gets its own place in the Watch App Store. I handle the target setup, TestFlight on the watch, the screenshots each case needs, and the review round. TapTap Grocery, one of my own apps, went through exactly this.