Cue is an AI copilot inside X & Threads. One click on any post → 3 on-topic replies in YOUR voice (paste a few of your posts, it mirrors your style). It writes full posts from a rough idea too. What's different: one-time purchase (no subscription), runs on your OWN Claude key — private, unlimited, ~$0.005/use — and trained on your voice, so replies don't sound like a bot. You own it forever.