Free · Tools and guides

Free tools and guides for founders who shipped

Work out what a build should cost, take an app made with Lovable, Bolt, Replit, v0 or Bubble to production, and find out whether your users can see each other's data.

Start here

Free Launch Check

Send us a test login and get a written report in 48 hours on whether one user can see another user's data, plus 4 risks that break apps after launch.

Get my free check ↗

Calculators

MVP cost calculator

4 questions on scope, integrations, design and user roles give a 2026 price range and timeline.

AI agent cost calculator

The 2026 build cost, the monthly model bill at your traffic and the first-year total for your agent.

Guides

Supabase RLS checklist

A Supabase RLS checklist for apps built with Lovable, Bolt or v0: lock every table, policies on auth.uid(), views, storage, a 30 second self test and CI.

v0 app to production

How to take a v0 by Vercel app to production in 2026: owning the repo and database, locking down the Publish flow, a step by step checklist and real costs.

Claude Managed Agents pricing

Claude Managed Agents pricing explained: tokens plus $0.08 per session-hour of running time, web search, budgets, and 3 worked monthly cost examples.

Bubble to code

Moving from Bubble to custom code in 2026: what you can export, why the app logic has to be rebuilt, how to move users and data, and what it really costs.

Replit app to production

How to move a Replit app to production in 2026: exporting the code, data and secrets, replacing Replit Auth, a step by step checklist and real costs.

Bolt.new app to production

How to move a Bolt.new app to production in 2026: what exports cleanly, what breaks first, a step by step checklist and the real cost of each path.