FIRECalc and cFIREsim pioneered historical retirement backtesting, but their 1990s form interfaces make it hard to visualize complex life events, multi-currency inflation, and dynamic guardrails. Here is how RetireStudio upgrades them for 2026.
| Feature | RetireStudio (retirestudio.app) | cFIREsim / FIRECalc |
|---|---|---|
| 🌍 1-Click Geo-Arbitrage ("Live & Earn in X → Retire in Y") | 22 Countries (Portugal, Spain, Thailand, Japan, Mexico, UAE…) + Years Saved | Not Built-In (Requires Manual Expense Re-Entry) |
| Annual Subscription Cost | $0 / Free Forever | $0 (Legacy 1990s/2010s Form UI) |
| 500-Run Monte Carlo Engine (P10/P50/P90) | Included Free | Historical Cycles Only (No Real-Time P10/P50/P90 Slider Studio) |
| Historical Crisis Stress-Testing (1929–2008) | 1929, 1966, 1973, 2000 & 2008 + Guardrails | US Historical Data Only (Hard to Isolate Specific Crisis Cohorts) |
| Draggable Timeline Milestones & Custom Shocks | Included Free | Paid Tier Only |
| Multi-Currency & Live World Bank CPI Inflation | USD, EUR, GBP, CHF, CAD, AUD, SAR, AED (No Bank Login) | USD / US CPI Only |
| Instant URL Sharing & Year-by-Year CSV Ledger | Included Free (?plan= URL & CSV Export) | Basic CSV / Static Charts |
Enter your numbers below to launch directly into the full interactive Monte Carlo & Historical Crisis Studio—100% free and saved automatically.