Try it here
This is the real thing in miniature: a running order on the left, the projector output on the right. Click an item to put it up, then walk it with ← → — or Space. B blacks the screen for prayer and brings the same slide back. Every word below is the app's own text.
The installed app carries all 31,102 King James verses and 275 hymns offline, finds the projector by itself, takes your sermon as a PDF or Word file, and lets you build the whole running order the night before. This page holds three hymns and three passages, and runs in a browser window instead of on a second screen.