FireFree: A FIRE Planning App That Calms Your Money Anxiety

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Introduction

The second product we're building at Aburi Studio is the one closest to my own life: FireFree, a FIRE (Financial Independence, Retire Early) planning app.

It answers one deceptively simple question: "If I keep living the way I live now, when can I stop working?"

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Demo

• Website: firefree.app
• Demo mode: no sign-up needed — enter the full product from the landing page, with six preset financial scenarios to explore
• Languages: full English / Traditional Chinese support

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Why we created this project

FIRE sounds like a dream until you turn it into numbers. Then it becomes something much more useful: a plan.

Carol and I have been planning our own financial future, and spreadsheets only take you so far: they don't show momentum, and they don't answer the only question that really matters — when?

We also noticed that money anxiety rarely comes from not knowing what you spent last Tuesday. It comes from not being able to see the future. You save a few hundred dollars a month with no idea whether it's enough; your banking app shows a cold balance and nothing tells you how long it would last.

So FireFree deliberately rejects two things: no expense logging (update your assets once a month, in minutes) and no bank linking (enter rough numbers yourself — your data stays yours). What you get in return is a map of your future.

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Key Features

• FIRE forecast: your income, expenses, assets, and debts, with compound growth and inflation applied — drawn as the curve where your net worth crosses your FIRE number, with your projected FIRE age on it. Based on the classic 4% rule; multiplier, withdrawal rate, and inflation are all adjustable.
• Asset tracking without bookkeeping: savings, investments, real assets, and debts, each with value history. Watching the curve climb is genuinely satisfying.
• Life goals you can toggle: add "buy a home" or "one big trip a year", flip each goal on and off, and watch your FIRE date shift. Abstract trade-offs become a visible curve.
• Automatic stock price sync: link holdings to tickers (US and Taiwan markets) and daily jobs keep valuations fresh.
• Multi-currency: accounts in USD, TWD, EUR… converted into one display currency.
• Privacy mode: one eye icon turns every amount into $•,•••.•• — share your screen without sharing your net worth.

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Technologies

FireFree is a Next.js web app — a PWA that works offline — backed by Supabase, and all the FIRE math lives in one shared TypeScript package so every screen shows exactly the same numbers. The deeper engineering stories deserve their own posts someday.

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Where it's at

FireFree is live and open for free sign-ups — there's a free plan you can stay on. An iOS app is in the works.

If FIRE is on your mind — whether you're deep into the movement or just want to know your number — playing with the demo is the fastest way in: no account, pick a scenario, explore the full product.

FireFree is part of a small family of tools we're building at Aburi Studio around time and money — alongside CoreHour, a minimalist time-boxing app (read about it here), and DailyWage, a real-time salary counter (read about it here).

If you have feedback, find me on X or email me — I read everything.