Momentiz — AI Reply for X (Twitter)

Grow on X by replying every day. No reply starts from an empty box — AI drafts it from the post. You edit it. You send it.

Momentiz is built on one idea: on X, showing up every day beats showing up brilliantly once. AI Reply is the piece that makes the daily habit cheap to keep — an AI reply generator that works inside X itself. It puts one button under every post on X (Twitter). Press it and X's own reply box opens with a draft already in it, written from what that post actually says. You read it, change what you want, and press Reply yourself. It never sends anything. It types into the box. Pressing Reply is always you. No queue, no timer, no autopilot, nothing running while you sleep. WHY THIS EXISTS Momentum on X is not one good post. It is being in other people's replies, day after day, for months. What breaks that streak is rarely motivation — it is the empty box, the pause before you know what to say. Enough of those in a row and you quietly stop showing up. This removes the pause and leaves the judgement to you. WHAT IT DOES • Adds an "AI Reply" button to posts on x.com and twitter.com • Opens X's normal reply composer with a draft already in place • Rewrite gives you a different draft for the same post; Polish cleans up a reply you wrote yourself, keeping your meaning and your style • Your voice: learns how you reply from your own Replies tab, so drafts sound like you — short or long, with or without emoji, greeting people by first name the way you do • The lightbulb button saves a post as an idea on your Momentiz Inspiration page • Describes images in the post using Chrome's built-in on-device model • Lets you set the language, the length, and whether emoji are allowed WHAT IT DOES NOT DO • It does not post, reply, like, follow, or repost for you • It does not queue replies and it does not run on a timer • It does not read your timeline in the background. It reads only when you press a button: the post you pressed it on and, when that post is a reply on a post's own page, the original post above it — or your own Replies tab, when you ask it to learn your voice • It does not touch X's internal APIs WHO IT IS FOR Founders building in public, writers growing an audience, and anyone who grows by showing up in other people's comments instead of shouting into their own timeline. If you already reply every day, this makes the habit cheaper to keep. If you keep meaning to start, this removes the part that stops you. PART OF MOMENTIZ AI Reply is one piece of momentiz.app. The rest of it holds your posting calendar, the weekly slots your posts go out on, and Post Coach, which scores a draft from 0 to 100 before you publish it. Replies are where momentum starts; the calendar is where it keeps going. Drafting runs on momentiz.app and needs an account there. Open the extension panel while you are signed in to momentiz.app and the two link themselves — or press "Log in to use" first. There is no key to copy across. PRIVACY The text of the post, its author's handle and display name are sent to momentiz.app so the draft can be written. When you reply inside a conversation on a post's own page, the original post at the top of that page (its first 600 characters and author) is sent too, so the draft answers in context. Images are described on your own machine; that one-sentence description and links to up to two of the post's pictures on X's image server are sent. If you set up Your voice, our server fetches those pictures from X so the model can look at them, and the extension sends up to 80 of your own replies, with the start of the post each one answers, so it can learn how you write. You can delete your voice at any time. Nothing is read until you press a button. Full policy: https://momentiz.app/privacy Momentiz is an independent product. It is not affiliated with, endorsed by, or sponsored by X Corp.