Hall Clock

Hall Clock is the phone controller for a meeting timer that runs on a small appliance in your hall and shows the time on the hall's display. Start and stop the timer, move to the next item, adjust the running time by a minute, jump to any item in the schedule, and see how the meeting is tracking against its planned finish — all from your phone, without leaving your seat. REQUIRES A HALL CLOCK DEVICE This app is a controller only. It connects to a Hall Clock appliance on the same local network as your phone, and has no function without one. There is no online service, no account to create, and nothing to sign in to. WHY AN APP AND NOT JUST THE BROWSER The controller is a web page served by the appliance, so it already works in any browser on the same network. This app exists for the two things a browser cannot do with a plain local-network page: open full screen with no address bar, and hold the screen awake for the length of a meeting so the timer stays visible without anyone touching the phone. CONNECTING The app opens your hall's clock automatically. If your hall uses a different address, tap Change address and enter it once — it is remembered from then on. PRIVACY No accounts, no analytics, and no data leaves your local network. The app communicates only with the clock appliance on your own network. The "REQUIRES A HALL CLOCK DEVICE" section is doing double duty — it sets user expectations and it's the thing a reviewer reads when the app shows only an error screen on their test device. Keep it prominent, and put the same explanation in the App access field.