Par: Financial Calculator RPN
TVM, Loan, Mortgage, NPV & IRR
$4.99 · Designed for iPad. Not verified for macOS.
The last calculator you need: full RPN financial math for loans, cash flows, bonds and dates, with the stack and registers always in sight.
The last calculator you need. Par is a full RPN financial calculator that follows the classic gold-key keystrokes, so the steps you learned years ago, or find in any finance textbook, work exactly as written.
TIME VALUE OF MONEY
• Solve for n, i, PV, PMT or FV, with payments at the beginning or end
• Monthly shortcuts for years and annual rates
• Odd first periods, with simple or compound interest
• Amortization: interest, principal and balance for any range of payments
CASH FLOWS
• NPV and IRR, with repeated flows grouped
• Review and change any flow without re-entering the rest
• A cash-flow diagram drawn as you enter them
BONDS, DEPRECIATION AND DATES
• Bond price, accrued interest and yield to maturity
• Straight-line, sum-of-the-years'-digits and declining-balance depreciation
• Future dates with the weekday, and days between dates (actual and 30/360)
STATISTICS AND MATH
• Mean, standard deviation, weighted mean and linear estimates with correlation
• Percent, percent of total and percent change
• Powers, roots, logarithms, factorials and rounding to the display
PROGRAMMABLE
• Up to 99 program lines with branching, loops, pauses and conditional tests
• Step through programs line by line, and edit them in place
SEE WHAT A CALCULATOR USUALLY HIDES
• The whole stack, shown live above the display
• Financial and storage registers in a side panel, with the program you're writing
• History of every calculation, to revisit and reuse
• Lessons that walk you through real problems, and help for every key
MADE FOR IPHONE AND IPAD
• Portrait and landscape, with a 10 × 4 keypad wherever it fits
• Liquid Glass design that follows light and dark mode
• Skins: Classic, Graphite and Paper, or choose your own colors and share them
• Hardware keyboard and iPad menu bar
• Siri and Shortcuts: loan payments, investment growth, days between dates, NPV, IRR and your last answer
• Apple Watch app with quick solvers, your synced history and a complication showing the latest answer on your watch
• VoiceOver, Voice Control, larger text and Increase Contrast
• Your numbers and programs are kept between launches
• History syncs between your iPhone and iPad with iCloud
Checked against more than 80 worked examples from the classic financial calculator handbook, with 10-digit accuracy and the same rounding.
No ads. No account. No tracking.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Small improvements and fixes.
The developer, Sawir Studio LLC, 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
- Sawir Studio LLC
- Size
- 11.1 MB
- Category
- Finance
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later. - Apple Watch
Requires watchOS 11.0 or later.
- iPhone
- Languages
English and 17 more
- English, Arabic, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Malay, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese, Turkish
- Age Rating
4+
- 4+
- Copyright
- © 2026 Sawir Studio LLC
