Tarn takes you from first instinct to a structured, developer-ready specification — through structured conversation, not a blank document. No UX experience required.
Most people with an app idea hand a developer a paragraph and hope for the best. Six months and a budget later, they get something that almost solves the problem they had.
The gap isn't technical ability. It's the spec. A good specification is the difference between a developer who builds exactly what you imagined and one who builds a reasonable interpretation of it. Tarn closes that gap — without requiring you to become a product manager.
No template to fill in. No jargon to learn. Tarn starts with a question and builds from there — extracting goals, design direction, and scope from what you tell it.
Goals, design tokens, references, and constraints each get their own card. You confirm what stays, edit what doesn't, and Tarn asks the right questions — in plain English, no expertise required.
Every decision you haven't made yet sits as an open question in MISSION. Tarn helps you answer them — one at a time, without overwhelm.
A structured spec.md and tokens.json pair. Everything a developer needs — goals, flows, design system, constraints — in one handoff document.
Nine structured layers, unlocked as you need them. B0 and B1 are free, forever. Each additional column adds depth without complexity.
B4 — Design Language — is the v1 hero column. B7 — Ready to Ship — is pay-per-project.
A human-readable specification covering goals, design system, scope boundaries, and open questions. Ready to hand to a developer.
Every design decision as a structured token file — colours, typography, spacing. Drop it straight into a design system or codebase.
A record of every decision made and every question resolved — so nothing gets misinterpreted six months into the build.
Tarn tracks your active session time and shows the equivalent senior UX director hours you've saved — at the export screen.
Start free. Unlock what you need. Column subscriptions are per account, not per project.
Tarn won't write your spec for you. It will ask the right questions until you've written it yourself — and then give you something you can hand to a developer with confidence.
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