FinStack : RPN Calculator

RIVER PRIDE

In-app purchases

About this app

FinStack is a professional RPN financial calculator designed for finance professionals, accountants, analysts, engineers, business users, real estate professionals, and students. Featuring a familiar HP12C-style layout, a powerful Reverse Polish Notation (RPN) engine, advanced financial solvers, and integrated notes, FinStack helps you calculate faster, document your work, and stay productive—all within a secure, completely offline workspace.

Whether you're evaluating investments, solving loan and mortgage problems, performing business calculations, or preparing financial reports, FinStack delivers the speed, precision, and reliability professionals expect.

PROFESSIONAL FINANCIAL CALCULATIONS

• True 4-Level RPN Stack (X-Y-Z-T): Perform faster calculations with a live stack display that minimizes keystrokes and improves calculation accuracy.

• Advanced TVM Solver: Instantly solve Time Value of Money (TVM) calculations including Present Value (PV), Future Value (FV), Payments (PMT), Interest Rates, Number of Periods (N), loans, mortgages, and investment scenarios.

• Cash Flow Analysis: Analyze uneven cash flows, calculate Net Present Value (NPV), Internal Rate of Return (IRR), and evaluate investment opportunities with confidence.

• Amortization Schedules: Generate detailed loan schedules showing principal, interest, payment breakdowns, and remaining balances.

• Interest Conversion: Convert nominal and effective interest rates quickly and accurately.

• Depreciation Methods: Calculate Straight Line (SL), Sum-of-the-Years'-Digits (SOYD), and Declining Balance (DB) depreciation.

• Statistical Functions: Perform essential statistical calculations for financial and business analysis.

WORK SMARTER

• Integrated Notes: Record assumptions, calculations, observations, and financial workflows alongside your calculations.

• Professional Financial Reports: Generate clean, structured calculation reports that are easy to review and share.

• Calculation History: Keep track of previous calculations and financial workflows without losing important information.

• Local Export: Save and export your reports and notes directly to your device.

100% OFFLINE. PRIVATE. SECURE.

Your financial data belongs to you.

FinStack performs every calculation entirely on your device without requiring cloud services.

• No internet required
• No advertisements
• No hidden trackers
• No mandatory accounts
• No data collection
• No external servers

Every variable, calculation, note, and report remains on your device, giving you complete privacy and control over your financial information.

WHY CHOOSE FINSTACK?

✓ Professional RPN workflow
✓ Classic HP12C-style layout
✓ TVM, NPV, IRR & Cash Flow analysis
✓ Amortization & Depreciation
✓ Integrated notes & financial reports
✓ Fast, accurate financial calculations
✓ 100% Offline & Private

Whether you're working in finance, accounting, investment analysis, engineering, banking, education, or business, FinStack provides the professional financial tools you need in a fast, reliable, and intuitive mobile experience.

Download FinStack today and experience professional financial computing on Android.