Tweetify: An AI rewriter that turns rough drafts into posts for X

01 / Overview

About Tweetify

02 / The challenge

What Tweetify needed to solve

The product had to give people real choice on every rewrite while keeping a free tier affordable to run.

1. 01

   One tool had to handle five kinds of post, from a single tweet to a full thread, and each follows different rules on X.

2. 02

   A single rewrite is a gamble, so users needed several options with a clear reason to pick one.

3. 03

   The output had to sound human, not like obvious AI text.

4. 04

   Visitors had to be able to try the rewriter without signing up.

5. 05

   A free tier had to stay within the cost of each model call.

03 / What we built

How we built Tweetify

We made the home page the product: a visitor can paste a draft and get rewrites right away, with the logic running in Next.js server actions.

• 01

  Three versions per rewrite

  An OpenAI chat model returns three versions, each with its own purpose and a plain recommendation. Users see which one to post for replies, retweets or profile visits instead of guessing.

• 02

  Five content types

  Users pick a single tweet, thread, reply, quote tweet or promotional tweet. Each type adds its own rule to the prompt, so a thread reads like a thread and a reply reads like a reply.

• 03

  Stackable rewrite modes

  Users can combine one or two of five modes, such as Hot Take or Thread Builder. This lets them steer the tone and structure without writing a prompt themselves.

• 04

  Live draft signal

  As the user types, a draft signal reads the text using pattern rules, with no model call. Users get quick feedback on their draft at no extra cost per keystroke.

• 05

  Free tier with a daily limit

  Anyone can try three rewrites a day with no signup. A server action screens the input and applies the limit before any model call is made.

• 06

  Stripe plans and billing

  Pro at $9 a month and Teams at $29 a month remove the daily cap. Checkout and the billing portal run on Stripe, and a webhook keeps the stored plan in step with the subscription.

• 07

  Accounts and rewrite history

  Users sign in with email or Google. Signed-in users keep their rewrites and can read them back from a recents list.

• 08

  Mode pages and product guide

  Each mode has its own page explaining what it does on X, and a four-step guide walks a new visitor from rough draft to posted tweet.

04 / The results

What changed for Tweetify

Tweetify is a working first phase of a paid writing tool for X.

• A visitor can paste a draft and receive three labelled versions without creating an account.
• Signed-in users keep a record of past rewrites and can return to them later.
• Customers can subscribe, change plans and manage billing without help from staff.
• API keys and rewrite logic stay on the server, and every input is validated with Zod.
• The free tier stays affordable because limits are applied before any model call.