Forty-plus worksheets, RPN and algebraic entry, and a keyboard you already know, built to get the most from your iOS device. Loans, bonds, cash flows, statistics, triangles, vectors and an equation solver, all in one app.
30-day free trial · one payment, no subscription
Familiar business-calculator logic, extended with menus, editors and iOS conveniences.
Time value of money, amortization, bond price & yield, Black-Scholes options, depreciation, interest-rate conversion and account balances.
Break-even, percents and margins, bill-tip-split, currency exchange with live rates, equal and unequal period cash flows (NPV, IRR, payback).
One- and two-variable statistics, six regression models, and probability distributions with combinations and permutations.
Plane and spherical triangles, quadratic equations, 3D vectors, complex numbers, trigonometry, logarithms and NIST-CODATA constants.
Type any equation and solve for any variable. Convert units, angles, polar/rectangular coordinates, currencies and interest rates.
Editors for your lists and equations, storage registers, memory backup and restore, date and time math, and detailed help for every menu.
Real worked examples from the app.
Main menuNine menus, one keyboard
Time Value of Money$250,000 loan payment: 1,580.17
Quadratic equation2x² − 2x − 12 → −2, 3
Triangle solutionSides, angles, perimeter, area
Units conversion100 cm in every length unit at once
Simple pricingOne payment, yours forever
Keep your own lists, equations and units, and look up the constants you need.
Universal ConstantsThe full NIST-CODATA list, searchable
Units DatabaseAdd, edit or reset any unit and category
(Date, Cash Flow) ListDated cash flows with a running total
Equation EditorLive variable check as you type
Every worksheet has a step-by-step guide with a worked example. Pick a menu to browse.
Use every function from the first launch. If it earns a place on your device, one payment unlocks it for good.