Predictable pricing. No surprise AI bills.

It is the centre of Luff, and it decides the way an experienced person would: does this job need AI at all? Every piece of work in your project goes through it, and it holds together two architectures: an AI Architecture that solves the AI problem, and a Software Architecture that lets non-technical people build complex enterprise software. For each job it picks who does it: the Luff Local Intelligence System inside the Luff Engine for the routine 80%, Jev for the quick 15% of decisions, and Claude for the 5% that needs deep reasoning. That is how Luff keeps AI costs down while keeping your software well built.

Typically 24 to 72 hours for a project, depending on its size and your crew size: about 48 to 72 hours with Core Squad (6), 24 to 36 with Accelerated (12), and 12 to 18 with Swarm (20). Time you take to review at the four milestones comes on top.

Wherever you choose: a standard cloud server for about $5 to $15 a month, a server you already have, or your own hardware. The code is yours, and it does not depend on Luff to keep running.

A Mac with Apple silicon on macOS 13.0 or later, and your own Claude subscription with Claude Code installed and signed in. Luff does its work through Claude Code, under your account. Everything else comes with the app.

Not to Luff's servers. The app makes no hidden connections, sends no usage data and has no cloud syncing or backup. Work you ask Claude to do goes to Anthropic through your own Claude Code account, exactly as if you used Claude Code yourself.

Jev is the judge in the 80:15:5 split: a small AI model that decides whether a message needs Claude before Claude is started. It is optional and runs on your own OpenRouter account: you add its key to the file ~/.luff/.env. It sees up to the first 300 characters of each chat message you write, sent to OpenRouter under your key. Set LUFF_JEV_SEND_TEXT=0 to stop the text being sent. With no key, Jev is off and every message goes to Claude as before. Nothing is sent to Luff's servers.

Yes. The app includes a 14-day trial with no sign-up. The trial can use every crew size, from Core Squad (6) to Swarm (20).

Only the crew size. Starter builds with Core Squad (6 builders), Pro with up to Accelerated (12) and Enterprise with up to Swarm (20). A bigger crew builds more parts of your application at the same time, so it finishes sooner. Everything else, including all four milestones and the core team of 8 or 9 roles, is the same on every plan.

Your licence is tied to your Mac and valid through your paid period; renewals deliver a fresh licence key to your portal. After you pay, give us your Mac's ID, which the app shows when you choose Show this computer's ID. A key for that Mac is created automatically and sent to your email and portal; paste it into the app. It is checked on your Mac, with no licence server involved.

Move your licence from the customer portal by entering the new Mac's ID. Each plan can move to a new Mac up to twice a calendar year. A fresh key for the new Mac is sent to your email and portal.

No. It is the design target. About 80% of the work, such as building screens, setting up the database, quality checks and going live, is done by the Luff Local Intelligence System, inside the Luff Engine, as ordinary code on your own machines, with no AI involved. About 15% is decided by Jev, the small judge model. About 5% is deep reasoning by Claude, such as the overall design and problems no template covers. How the split falls depends on your project, and without an OpenRouter key Jev is off, so its share goes to Claude.

If a version has not yet been through Apple's notarization check, macOS asks for confirmation the first time you open it. Right-click the app in Applications, choose Open, then confirm. You only need to do this once.

New versions are published on the Releases page, each with a SHA-256 fingerprint you can use to confirm the download is genuine. A Check for Updates button is coming in a later version of the app. It will only check when you click it, never on its own.

Paddle is our merchant of record. It takes cards, Apple Pay and Google Pay in US dollars, calculates and remits sales tax or VAT for your country, and issues your invoices. Update your card, download invoices or cancel from the customer portal.

The applications Luff built for you are yours, with all their code, on your own servers. They do not depend on the studio or its licence to keep running.