My DAW already has a lyrics track. Why do I need a plugin?
Built-in lyrics features exist for notation and export — printing a score, embedding text in a MIDI file, generating a lead sheet. They are not designed to be read while singing. A prompter is built for the person at the microphone rather than for the printed page.
If you engrave charts for session players, keep using the lyrics track for exactly that. The prompter sits alongside it as the singer's display and does not touch your notation data.
No card required. Install the VST3, paste a lyric sheet, and record one take end to end before you decide.
No — you paste the sheet into the plugin, which keeps the singer's display independent of your notation edits.
Both. The plugin saves the lyric sheet, window size and markers inside the DAW session.