Decision Lab vs CompoundFX

Making a major financial decision? Stop juggling spreadsheets and browser tabs. Decision Lab gives you a library of scenario-based calculators designed to answer real questions — not just crunch numbers. RUN EXPERIMENTS, NOT JUST CALCULATIONS Each calculator is built around a real decision: Should I rent or buy? Is an EV cheaper than gas over 5 years? When can I actually retire? Enter your numbers, see results instantly, and save them as experiments you can revisit anytime. 11 CALCULATORS ACROSS 5 CATEGORIES Housing: Mortgage, Rent vs Buy, Home Affordability Vehicle: Auto Loan, Car Total Cost of Ownership, EV vs Gas Wealth: Compound Interest, FIRE Number, Retirement Age Family: Child Cost Estimator Career: Real Hourly Wage SEE WHAT ACTUALLY MATTERS Every result highlights the Key Drivers — the 3 inputs that influence your outcome the most. Stop guessing which assumptions matter and focus your attention where it counts. COMPARE OPTIONS SIDE BY SIDE Rent vs Buy, EV vs Gas, and Car TCO calculators let you enter two scenarios and see a clear winner with charts over time. YOUR ASSUMPTIONS, YOUR BASELINE Set your expected investment return, inflation rate, home price growth, and more in one place. Every new experiment starts from your personal baseline — no re-entering the same numbers. SAVE, DUPLICATE, AND ITERATE Save experiments with custom titles and notes. Duplicate any result and tweak one variable to see how it changes the outcome. Your financial thinking evolves — your tool should too. FULLY OFFLINE & PRIVATE No account required. No data leaves your device. Every calculation runs locally.

CompoundFX is the compound interest calculator that shows you what it takes, not just what you'll have. Model investment growth, plan for retirement, and pressure-test your FIRE goals with precision. Set a goal, $1M by age 60, a down payment, or a college fund, and CompoundFX solves for the missing piece. The rate you’ll need. The years it will take. The deposit you have to make. No more guessing. No more trial and error. GOAL MODE Pick your goal. Choose what to solve for. CompoundFX does the financial math. - Solve for Rate of Return - Solve for Time Horizon - Solve for Starting Principal - Solve for Monthly Contribution COMPARE SCENARIOS Should you save more or invest longer? Pay off debt or boost your 401(k)? Save scenarios and put them head-to-head. See the difference, the total dollar impact, and exactly when one strategy pulls ahead. A CALCULATOR THAT SHOWS ITS WORK - Real-time growth chart with milestone markers ($100K, $250K, $1M) - Year-by-year breakdown with full transparency - Inflation, Taxes, and Expense Ratios: See what you actually keep after fee drag - Daily, weekly, monthly, or annual contributions - Custom compounding intervals (Daily to Annually) - Sub-year precision for short-horizon plans DESIGNED FOR iPHONE & INDIE DEV Dark glass UI. Smooth haptics. Built natively in SwiftUI for iOS 17 and up. No accounts. No ads. No tracking. Your scenarios stay locally on your device. EXPORT AND SHARE Generate a polished two-page PDF report with an executive summary, growth chart, and full milestone breakdown. Or share a branded image to text or social media. FREE FEATURES - Full compound interest calculator - Real-time growth chart and year-by-year table - Inflation, tax, and expense adjustments - Custom contribution and compounding schedules - Branded image sharing PRO: $4.99 (ONE-TIME PURCHASE) - Goal Mode (Solve for any missing variable) - Save unlimited scenarios - Compare scenarios side-by-side - Export two-page PDF reports One purchase. Unlocked forever. Family Sharing fully supported. WHO IT'S FOR Whether you're starting your first Roth IRA, managing index funds, planning early retirement, modeling a college fund, or tracking a Bogleheads portfolio, CompoundFX gives you the answer in seconds. PRIVACY FIRST CompoundFX is fully offline. No data collection. No accounts required. No analytics. No third-party SDKs. Your personal finance data is stored safely on your device. DISCLAIMER CompoundFX is for educational and planning purposes. It does not provide investment, tax, or financial advice. Returns shown are projections based on the inputs you provide and do not guarantee actual investment performance. Questions or feedback? support@originsoftware.net