Most AI app ideas don't work. These are the ones that shipped.

Built under constraints. Cut to the minimum. Tested on real problems.

Every project here has a constraint, a cut list, and a full case study. This is a build record, not a tools directory.

Each build was scoped to ship in a weekend. Anything that didn't fit was cut.

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Read the Spending Reality Check case study →

Built with Claude · one weekend · constraints were the design

Spending Reality Check

Built because most budgeting apps overcomplicate a simple problem.

ProblemBudgeting apps collect everything but show nothing useful
ConstraintNo accounts. No backend. Nothing leaves the browser.
CutNo categories
No charts
No export
No sync
No subscriptions
FailedAdded categories early. Made the tool slower and less useful. Removed.
StackClaude · HTML/CSS/JS · browser localStorage
Use the Tool Full Build Case Study

All real builds

Each one was scoped to ship in a weekend. Anything that didn't fit was cut. Some ideas didn't survive at all. Only the ones that worked are here.

Spending Reality Check

Budgeting apps ask you to connect a bank account, set up categories, and navigate dashboards. This one doesn't. Log a number, see whether you're spending more or less than last week. That's the whole thing.

Built with Claude · one weekend · cut: accounts, sync, categories

Use the Tool How It Was Built

Should I Buy This?

Most purchases feel right in the moment. This forces you to slow down and decide properly. Asks a few questions, gives a clear verdict. No account, no history stored.

Built with Claude + Google Stitch · one weekend · cut: accounts, history, tracking

Use the Tool How It Was Built

Idea Clarifier

Most builds fail before a line of code is written. The idea was never sharp enough. This walks you through a few questions to fix that before you start.

Use the Tool How to Clarify an Idea

App Workflow Clarifier

It's easy to build the wrong thing fast with AI. This tool helps you figure out what the app actually needs before you write a single prompt.

Use the Tool What You Can Build

Retro Screensaver

One HTML file. Open it in a browser and it plays old-school screensavers with retro game footage and a pixelated crossfade. No install, no dependencies.

Built with HTML + Canvas · one weekend · cut: frameworks, npm, install

Launch Screensaver See How It Works

How to think about a build before starting

Friction

What is actually causing the problem?

Engine

What is the smallest useful solution?

Restraint

What should NOT be included?

Decision

Should this even be built?

Not sure where to start?

1 I have an idea but it's unclear 2 I want to choose the right tool 3 I want to see real builds 4 I am new to this

Tools I've used in builds

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What this site is for

Most people don't need a new SaaS product. They need one small tool that solves one specific problem. Most AI builds fail because they ignore that. The builds here show what it looks like when you don't.

Explore real builds, compare tools by use case, or browse by category: AI code assistants, full-stack builders, UI generators, automation agents, and workflow tools.

Start with something real

Built in one weekend. Cut to fit. Shipped anyway.

Start with a problem. Then build the smallest thing that solves it.

See the builds