Show HN: MyWritingTwin: an AI Writing Profile that makes LLMs sound like you

SYS //STYLOMETRY.ENGINE

v2.0

Computational Stylometry

Your Emails. Your Reports. Your LinkedIn.All in Your Voice — Not the AI's.

Executives and professionals spend hours fixing AI drafts that don't sound like them. A Writing Profile captures your exact style across formats and languages — then deploys it on ChatGPT, Claude, Gemini, or any AI tool you already use.

7

Dimensions

50+

Style Markers

80%

Less Rewriting

Create Your Writing Profile — Free

One profile. Every AI tool. No monthly fee.

Field Report

“I send it to every AI I use. My team can't tell which emails I wrote and which the AI drafted.”

— — VP Sales, Enterprise SaaS

Problem Analysis

The Problem with AI Writing

You've tried using ChatGPT for emails. Claude for documents. Gemini for drafts.

They all have the same problem: they don't sound like you.

Every output needs heavy editing. The tone is off. The transitions are wrong. It uses words you'd never use. And it adds em-dashes everywhere.

You end up spending almost as much time fixing AI drafts as you would writing from scratch.

Worse if you're multilingual:

01Your English is direct and confident

02Your Japanese needs the right level of keigo

03Your French has a different rhythm entirely

No AI tool handles this. You're stuck switching voices manually, losing time, losing consistency.

Cost Analysis

The Hidden Cost of Generic AI

Every email you rewrite is time you'll never get back.

Let's do the math:

20 emails per day x 5 minutes of editing = 100 minutes lost daily

That's 8+ hours per week fixing AI output

Over a year: 400+ hours — ten full work weeks

And that's just email. Add Slack, documents, presentations...

The real cost isn't just time. It's cognitive load.

Constantly switching between "what AI wrote" and "what I would actually say" is exhausting. It fragments your focus. It slows you down.

You didn't adopt AI to work harder.

Methodology Overview

See How It Works

45 seconds to understand how My Writing Twin captures your unique writing style

Your browser does not support the video tag.

Research-Backed Methodology

Introducing MyWritingTwin: Your AI Writing Twin System

MyWritingTwin is a complete methodology for capturing your authentic writing style. Built on computational stylometry, the same science used in forensic linguistics to identify anonymous authors. Our 7-dimension analysis framework extracts 50+ style markers that make your writing uniquely yours.

Read the research whitepaper: 50+ academic citations from peer-reviewed sources.

01

Collect Your Writing DNA

Guided questionnaire identifies your communication contexts

Templates help you gather the right writing samples

Works for any language, any context

02

Extract Your Unique Patterns

7-dimension analysis: tone, rhythm, vocabulary, sentence construction, cultural markers, language-specific patterns, signature elements

Quantitative metrics: sentence length stats, vocabulary diversity (TTR), function word frequencies

Culture-specific patterns (Japanese keigo, French tu/vous, formality levels)

03

Generate Your Writing Twin

Dual-output system: comprehensive guide + optimized runtime block

Writing Style Profile: 6-8K tokens of personalized writing analysis (learn from this)

Runtime Block: 3-4K tokens optimized for deployment (deploy with this)

04

Deploy Anywhere

Works with ChatGPT, Claude, Gemini, or any LLM

Auto-detects context: email vs Slack, internal vs customer, English vs Japanese

Your style, every time

Comparative Analysis

Before vs After

Before My Writing TwinAfter My Writing Twin

AI output feels roboticOutput reads authentically like you

10+ minutes editing each emailQuick review, minimal edits

Different style across platformsConsistent style everywhere

Language switching is jarringSeamless multilingual output

Context blindness (same tone for CEO and team)Auto-detects audience and adapts

Wasted AI subscriptionAI that actually saves time

Free — No Credit Card Required

Try Your Free Writing DNA Snapshot

See a preview of your unique writing style profile — completely free. Our Writing DNA Snapshot analyzes your writing patterns, tone, and personality markers in seconds.

Instant writing style analysis

Personality & tone indicators

AI readiness score

Shareable snapshot card

Get Your Free Snapshot

No account required — just paste your writing

Famous Authors' Writing DNA

Every Writer Has a Unique Fingerprint

See how literary legends score across six dimensions of writing style. Discover which famous author writes most like you.

Ernest Hemingway

The Efficient Communicator

Writing DNA

terse proseshort declarative sentencesminimal adjectivesiceberg theory

Fun Fact

Hemingway wrote standing up and aimed to write 500 words per day.

Discover Your Writing Twin

Free 2-minute quiz — no signup required

See all writing styles →

Select Configuration

Choose Your Path

Build your Style Profile first, pay when you're ready

Starter

Get started with the essentials

$49

Best for: Single-language users getting started

Included:

1 language

Included:

3 style matrix sections

Included:

1 regeneration included

Included:

All deployment guides

Included:

Basic documentation

Start Building Free

Recommended

Pro

Best Value - Full Power

$99

Best for: Multilingual professionals

Included:

Unlimited languages

Included:

Unlimited style matrix sections

Included:

1 regeneration included

Included:

All deployment guides

Included:

Example corpus + sample outputs

Included:

Edit subscription: $10 first year (normally $29/yr)

Start Building Free

Executive

Premium experience with extras

$249

Best for: Leaders who want the complete package

Included:

Everything in Pro

Included:

1 year edit subscription included

Included:

Unlimited audio transcription credits

Included:

Priority email support

Included:

Deep Voice Analysis powered by our most advanced AI

Start Building Free

Enterprise

Multi-user & agency solutions

Custom

Everything in Executive

Multi-tenant voice profile management

Dedicated API rate limits

Custom onboarding & integration support

SLA & priority support

Agencies & teams managing multiple voice profiles

Contact Us

🎁

Bonuses Included (All Paid Tiers)

+Real anonymized example corpus

+Sample Writing DNA output for reference

+Iteration workflow guide

14-Day Satisfaction Guarantee

If you follow the methodology and don't feel like your Writing Twin captures your authentic writing style, email us within 14 days for a full refund. No questions asked. No hoops to jump through.

We're confident because this system was built from real daily use—not theory.

Reference Documentation

Frequently Asked Questions

How is this different from prompt packs?

Prompt packs give you generic templates that work the same for everyone. They tell AI to "be professional" or "sound friendly."

MyWritingTwin is fundamentally different. We forensically extract YOUR writing patterns from YOUR actual writing samples. The result captures:

-- Your actual vocabulary (not generic "professional" words)

-- Your sentence rhythm (short punches vs. flowing paragraphs)

-- Your transition patterns (how YOU connect ideas)

-- Your formality shifts (how you write to your CEO vs. your team)

-- Your cultural and linguistic nuances (keigo levels, tu/vous, etc.)

Prompt packs tell AI what to sound like. Style Profiles show AI how you actually write, with concrete examples. That's why AI trained on your Style Profile produces output you can use with minimal editing.

Do I need technical skills?

Not at all. If you can copy-paste and follow step-by-step instructions, you can build your Writing Twin. We provide detailed guides for every step of the process.

Which AI platforms does this work with?

All of them. We include specific guides for ChatGPT (Custom GPTs), Claude (Projects), and Gemini (Gems). The Runtime Block works with any LLM, including API usage.

How long does setup take?

Here's the breakdown:

• Collecting samples: 15-60 minutes (depending on how organized your writing is)

• Questionnaire + setup: 10-15 minutes

• Deploying: 10-15 minutes per platform

Total: Under 2 hours for a system you'll use daily.

What if I only speak one language?

MyWritingTwin works great for single-language users. You'll get style consistency across different contexts (email vs Slack vs documents) even in one language. The Starter plan ($49) is designed exactly for this: one language, up to 3 style contexts, everything you need to get AI writing like you.

What if it doesn't work for me?

We offer a 14-day satisfaction guarantee. If MyWritingTwin doesn't help you create an AI Writing Twin that writes like you, email us for a full refund.

How does the output work with ChatGPT/Claude/Gemini?

You get a master prompt file that you paste into any AI tool's system instructions. It works with ChatGPT Custom GPTs, Claude Projects, Gemini Gems, or any LLM that supports system prompts. One file, works everywhere.

Do I need to re-run this every time?

No, your Style Profile works indefinitely. Once generated, you can use it for months or years. All plans include 1 free regeneration if you want to refine your profile after initial testing. For ongoing updates, our Edit subscription ($29/year) provides unlimited regenerations.

What if my writing style evolves or I want to add new languages, formats, or targets?

Subscribe to the Edit plan ($29/year, or $10 first year for Pro users) to update your profile anytime. Add new writing samples, expand to new languages, add new communication contexts, and regenerate as often as you need. Your Style Profile grows with you.

Can I use this with multiple AI tools?

Yes! The output works with ChatGPT, Claude, Gemini, and any other LLM. You can deploy your Style Profile across all your AI tools simultaneously. Same authentic style everywhere.

What exactly do I receive when I purchase?

You get two optimized outputs designed to work together:

Writing Style Profile (~6-8K tokens): The Writing Style Profile (~6-8K tokens) is your personalized writing analysis. It reveals your distinctive patterns, voice characteristics, and context-specific behaviors with real examples from your writing. Read it to understand what makes your communication style unique.

Runtime Block (~3-4K tokens): The Runtime Block (~3-4K tokens) is optimized for deployment. It's the efficient system prompt you paste into ChatGPT, Claude, or any AI platform. Compact enough to avoid token waste, detailed enough to capture your authentic voice.

Why two outputs? Why two outputs? The Profile is written for you to read and learn from — too rich for direct AI use. The Block is compressed for AI execution but too dense for human reading. Together, they give you both understanding and performance.

Initialize System

Ready to Capture Your Writing Style?

Stop wasting time rewriting AI drafts. Create an AI Writing Twin that actually writes like you.

Recommended Configuration

Pro Package — $99

+Unlimited languages and sections

+1 regeneration included

+All deployment guides

+Example corpus + sample outputs

+Edit subscription: $10 first year (normally $29/yr)

Start Building Your Twin — Free

No credit card required. Pay when you're ready.