FIRELab: FIRE Calculator
Coast, Barista & Lean FIRE
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Know your FIRE number. Then find out whether you're actually getting there.
Know your FIRE number. Then find out whether you're actually getting there.
Most FIRE calculators give you a number and forget you. FIRELab gives you five, then tracks your real net worth month after month so you can see the gap between the plan and reality.
FIVE MILESTONES, ONE PLAN
Enter your spending once and see every FIRE target at the same time, ordered by which one comes first:
Coast FIRE — stop contributing and let compounding finish the job
Barista FIRE — part-time income covers part of the lifestyle you choose
Lean FIRE — a simpler life, a smaller number
Regular FIRE — your current lifestyle, indefinitely
Fat FIRE — room for comfort and travel
No re-entering the same numbers on five different screens. Change your withdrawal rate and watch all five targets move together.
TRACK WHAT ACTUALLY HAPPENS
Record your net worth once a month. FIRELab separates the money you contributed from what the market added — or took away. That distinction is what makes a return number honest, and almost no app bothers with it.
Your history feeds the projection. Miss a few months and the math still holds: returns are measured over elapsed time, not over the entries you happened to record.
THE CHART THAT MATTERS
A single timeline showing your projected path, with each milestone marked where your curve crosses it, and the exact time to each one listed below. Not just how much — when.
BUILT FOR HOW FIRE ACTUALLY WORKS
Real returns, so your target means the same thing in today's money
Coast FIRE measured against a target that rises as your deadline approaches — the calculation most tools get wrong
Time-weighted returns, so heavy contribution months don't distort the number
Savings rate calculated from what you actually saved, not what you planned to
Withdrawal rates from 2.5% to 5%
PRIVATE BY DESIGN
No account. No sign-up. No bank connections. No analytics. Your net worth never leaves your iPhone — because a number that personal has no business on someone else's server.
Works fully offline. Available in English and Portuguese, with support for USD, BRL, EUR, GBP, CAD and AUD.
FREE AND PREMIUM
Everything above is free, including unlimited monthly tracking.
FIRELab Premium is a single purchase — no subscription — and unlocks:
Your real annualized return, after inflation
Plan vs reality: your actual net worth against the plan you set
Contributions vs growth: what you put in versus what the market added
A prompt to update your expected return once your own history is long enough to trust
FIRELab is an educational tool. Projections are estimates based on the assumptions you enter and do not predict actual investment results. This app does not provide financial, tax, or investment advice.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
FIRELab is now ready for iPhone Duo! This update adds support for Apple's new foldable iPhone, so you can track your path to financial independence on both the outer and inner displays.
The developer, Gilberto Jose de Nazare, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Gilberto Jose de Nazare
- Size
- 5.1 MB
- Category
- Finance
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - iPad
Requires iPadOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.6 or later.
- iPhone
- Languages
- English and Portuguese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- FIRELab: FIRE Calculator $9.99
- Copyright
- © 2026 Glassy Apps