ReaNOS
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A workspace for thinking things through

Think it through,
then decide.

ReaNOS takes a decision you're turning over — a move, a job, a problem, a what-if — and maps it into the paths genuinely open to you. Each one weighed honestly, with what it rests on in plain sight and open to challenge. It won't tell you the answer. It helps you reason your way to one.

Works in your browser · installs as an app · signed out, nothing leaves your device
The honest promise
Most tools that touch the future pretend to predict it. ReaNOS doesn't. It makes your options, assumptions, evidence and trade-offs explicit — so the reasoning is yours to inspect, question, and update.
Not a chatbot · not a fortune-teller · not advice · not a substitute for your own judgement.

How it works

A clear path from a situation you can't hold in your head to one you can stand behind.

1

Frame it

Describe the situation in your own words. Add facts and assumptions as first-class evidence — lock the facts that are fixed.

2

Weigh the paths

Claude maps it into distinct paths, each with a plausibility, a confidence, the evidence behind it, and what it rests on.

3

Simulate & compare

Play any path forward several moves, then compare a branch you took against one you didn't — side by side.

4

Challenge & update

Have it try to break its own reasoning, then add new evidence and watch the weighting visibly recalculate — and why.

Built to be trusted, not just believed

The intelligence underneath is structured, inspectable, and accountable.

Plausibility ≠ confidence ≠ evidence

Three separate, honest axes — so a bold option can read as "credible but I'm not sure," never a false certainty.

Evidence that moves the model

Add context and the paths re-weigh in front of you, with a plain-language note on what changed and why.

A red team on demand

Challenge any path: the weakest assumption, a sceptic's objection, a pre-mortem, and whether the odds are inflated.

See the whole decision

A living map of your committed path and every what-if branch you explored — click anywhere to revisit it.

Eight ways in

Life, Career, Problem-solving, Foresight, History, IT, Mechanic and Medical (information only) — each a tuned lens on the same method.

Yours, and private

Signed out, your reasoning stays in your browser and never leaves it. Sign in and your cases sync to your account, so they follow you between devices. A new account is a workspace of one; invite a team and cases are shared with them. Export a full case to a file at any time.

Bring something you're actually turning over.

The kind of thing that's been going round your head for weeks. Leave with a clearer map of it.

Open ReaNOS →