What is my unfair advantage?

That was the question that started all of this.

On April 29th 2026 I typed it into a Claude conversation. Not because I had a specific problem to solve. Because I wanted to think clearly about what actually sets me apart — not with the usual self-assessment answers, but with something useful.

The AI broke it down: narrow market, deep domain, dual-operator profile (I code and sell and track compliance), regulated niche with first-mover timing, low burn rate. A solid summary. But there was one line at the end that stayed with me: “your unfair advantage is defensive — hard to replicate, but hard to scale if you are the bottleneck on every front.”

That was true. So the next question came naturally.

What are a few KPIs I could use to track my goals in a simple but smart way?

Four domains, maximum three metrics each. SaaS, real estate, finances, fitness. The AI assembled the list, then asked: should I build a tracker artifact?

I said go ahead.

Ten minutes later there was a working widget in the chat. Editable KPI cards, status indicators, localStorage persistence. Useful, but it lived inside the conversation. So I asked: how do I run this outside the chat?

The answer: a standalone HTML file, local storage, no installation, runs in the browser.

Then I asked for Excel and CSV export and import. Then an English guide at the bottom. Then it turned out all the labels were in Hungarian, so I asked for an EN/HU language toggle with a proper i18n system. Then the guide was overflowing on smaller screens, so it became an accordion.

One conversation. Zero effort to a finished tool.

This is what interests me about systems — not that something looks elegant, but that it grows organically from a real question. The KPI Tracker does not exist because “a KPI tracker would be useful.” It exists because a strategic question led to a domain list, which led to a measurement need, which led to a concrete tool.

The tracker covers four areas. SaaS metrics: MRR, churn rate, and pipeline-to-paying conversion. Real estate: cashflow per unit, LTV-to-equity ratio, and portfolio size. Personal finance: savings rate, passive-to-active income ratio, and combined ETF and BTC position. Fitness: 7-day HRV average, active days per week, and bodyweight trend. Every KPI has a target and an alert threshold — you are not just watching numbers, you know exactly when to act.

No subscription. No account. No server. Just a HTML file that stores everything in your browser and never sends anything anywhere. Full Excel and CSV export. EN/HU language toggle. Runs offline.

If that philosophy resonates, you can download it — I only ask for a quick registration upfront.