Does The Finance Knife work offline?
Yes. The Finance Knife is a single HTML file that runs entirely in your browser. No internet connection required after download. Your data never leaves your device.
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The Finance Knife
Money maths — no spreadsheet required
Finance & BusinessKnife 12 of 50
$39
One-time purchase · Instant download30-day money-back guarantee
$39
What it does
The Finance Knife puts six essential financial calculators and a Scenario Studio into a single HTML file. Model compound interest with Oracle Mode (reverse-engineer your savings goal) and Monte Carlo simulation (see probability-weighted outcomes under volatility). Generate loan amortisation schedules with extra-payment analysis, calculate IRR and NPV, reference 20 currency exchange rates, split VAT inclusively or exclusively, and generate printable invoices — all locally in your browser. Global inflation adjustment lets you see every result in today's dollars. Your financial data never touches a server.
LIVE DEMO — TRY IT NOW
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INCLUDED TOOLS — 10 TOTAL
\Compound Interest Calculator
\Oracle Mode
\Monte Carlo Simulation
\Loan Amortiser
\IRR/NPV Calculator
\Currency Reference Table
USE CASE 01\Retirement Planning
\VAT/Tax Splitter
\Printable Invoice Generator
\Scenario Studio
\Inflation Adjustment
USE CASE 02\Freelancer Invoicing
USE CASE 03\Startup Financial Modelling
USE CASE 04\Loan Comparison
USER'S GUIDE
Download PDFFull documentation with detailed instructions for every tool.
DELIVERYSingle HTML fileDownload instantly after purchase
PRIVACY100% localYour data never leaves your machine
OWNERSHIPOne-time purchaseNo subscription, no recurring fees
PRO TIP
The file works in any modern browser — Chrome, Firefox, Safari, Edge. Save it to a USB drive, email it to yourself, or keep it in your cloud storage. It will work anywhere, anytime, forever.
Sovereignty as a Service
$39. Yours. Forever.
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FREQUENTLY ASKED QUESTIONS
OTHER PRODUCTSIs The Finance Knife a subscription?
No. The Finance Knife is a one-time purchase of $39. No monthly fees, no renewals, no price increases.
What is included in The Finance Knife?
The Finance Knife bundles 10 finance & business tools into a single HTML file: Compound Interest Calculator, Oracle Mode, Monte Carlo Simulation, Loan Amortiser, IRR/NPV Calculator, Currency Reference Table, and 4 more.
Where is my data stored?
Entirely in your browser's local storage. Nothing is uploaded, transmitted, or tracked. You can export your data as JSON at any time and import it on another device.
Which browsers and operating systems does The Finance Knife support?
Any modern browser — Chrome, Firefox, Safari, Edge — on Windows, macOS, Linux, ChromeOS, iOS, or Android. The same file works everywhere.
Can I try The Finance Knife before buying?
Yes. The interactive demo on this page is the full knife running in an iframe. Try every feature in your browser, no signup required.
Sovereignty as a Service