Browser-based prompter — works in Google Chrome on phone, tablet, laptop and TV. Your script stays on your device; nothing is uploaded.
Option 1 — official Cast button (appears in Chrome when a Chromecast or TV with Chromecast built-in is on your network):
Option 2 — cast it yourself:
• Android phone: Chrome menu ⋮ → Cast screen → pick your TV — this prompter (camera + script) mirrors to the TV.
• Computer: Chrome menu ⋮ → Cast… → pick your TV → choose Cast tab.
• Smart TV browser: open this same page in the TV's own web browser — the prompter runs there too, and a Bluetooth keyboard or the TV remote's arrows control the scrolling.
Real tests on this device and browser — results are shown exactly as detected, never assumed.