Janus Calculator app icon

Apps Like Janus Calculator for iPhone and iPad

Standard and RPN programmable calculators.

The app provides two calculators: one using Standard Notation and another using Reverse Polish Notation. Both calculators are programmable and include finance and scientific functions, plus 45 physical constants.

by Geoffrey Domm★ 2.01 ratingsProductivityFreeData updated 2026-09-14

Janus Calculator screenshots

Ranked alternatives

Showing 561–580 of 1,000 ranked alternatives.

  1. UK Tax Calculators 2024-2025 app icon

    UK Tax Calculators 2024-2025

    Rayan Arman

    Calculate taxes and update automatically

    Calculate income tax and national insurance based on current and future tax years. Input income details to determine liabilities. Track pension contributions and student loans. Calculate benefit in kind values.

    ★ 4.52 ratingsFinanceFreeData updated 2026-09-08
  2. Intrinsic Value Calculator DCF app icon

    Intrinsic Value Calculator DCF

    Best Implementer LLC

    Calculate with DCF

    Calculate of stocks using the Discounted Cash Flow model. Input parameters include cash flows, growth rate, and discount rate. Save calculations to iPhone and load them for updates.

    ★ 5.04 ratingsFinanceFreeData updated 2026-09-06
  3. RPNu app icon

    RPNu

    Scott Johnson

    ★ 0.00 ratingsUtilitiesFreeData updated 2026-09-12
  4. Fan Law Calculator app icon

    Fan Law Calculator

    Pheinex, LLC

    Calculate fan performance changes

    Calculate performance changes based on airflow, rpm, pressure, and current. Input values to get real-time updates. Adjust variables to estimate new system performance metrics.

    ★ 5.04 ratingsProductivity$9.99Data updated 2026-09-11

How we rank alternatives

Apps are ranked by functional similarity, category fit, rating confidence, and popularity.