Don't Settle for "Mobile-Friendly": A responsive website isn't an app. You need a Native App that uses the phone’s camera, push notifications, and local storage.
Offline Mode is Mandatory: Factories have WiFi dead zones. If the app spins and crashes when the internet drops, it is useless. The app must buffer data and sync later.
The Camera is the Sensor: The biggest advantage of mobile is the camera. Use it to scan QR codes for asset ID and record video clips of machine failures.
Push > Pull: Desktop software requires you to check it. Mobile apps alert you. The best OEE apps push "Line Down" notifications to your pocket instantly.