Apps I've built

I build with Claude Code. Each app started with a real problem, mine or someone else's. Every example you see in a screenshot is made up.

Flagship apps

The ones real people use, me included.

Research tools

Tools that do the homework before anyone makes a decision.

Hypothesis Lab

Finds the five assumptions most likely to kill a business idea.

Ranks them, names the biggest one, and designs a two-week test for it.

Super Sarah

Scans a market's public listings, like app stores and websites, for whatever you tell it to look for.

It turns hundreds of listings into a ranked list of matches, with the evidence for each. Can be tweaked for what you need to research. Built with Python.

Sonar Sarah

Maps an entire market: who the players are, what they charge, and how they're funded.

Every claim has a source, so you can see where the gaps are and how to price against them.

Deep Dive

Researches a single company in depth and adapts its search to the kind of business it is.

It sorts every finding into what the records show, what's inferred, and what's still unknown, with a source for each.

Thinking tools

Tools that help me decide and learn.

Conflict Advisor

Runs a hard interpersonal conflict you're having, in the workplace or at home, past five different lenses: a psychologist, a political strategist, a negotiator, a mentor, and a contrarian who challenges your own read of the situation.

They then convene in a boardroom to debate and agree on one concrete action plan.

Study Buddy

Turns course materials into a study partner.

It quizzes you, writes revision notes, tutors you with questions, or pressure tests your argument.

Life hacks

Small apps for my own day.

Fifth Gear Fitness

A one-tap stopwatch and voice coach for the interval workouts I do on my own.

It talks me through every tread, row, and floor block, calling out each all-out and push, through to recovery, and it sets my time and/or distance as the target to beat in the next round.

Habit Tracker

Tracks daily habits and streaks.

One of my first builds. I still use it.

To-do App

A simple to-do list.

One of my first builds.

Let's talk about your team.

Bring the problem you want me to solve first and let's have a chat.