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
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Janus Calculator screenshots

Ranked alternatives

Showing 581–600 of 1,000 ranked alternatives.

  1. 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
    App details
  4. Lite Financial Calculator app icon

    Lite Financial Calculator

    Alfonso Mogollon

    Calculate, convert, and analyze data

    Perform arithmetic, business, , and scientific calculations. Convert metrics and currencies. Calculate markup, margin, loan amortization, net present value, and internal rate of return. Determine bond yield to maturity and Macaulay duration.

    ★ 5.01 ratingsProductivity$1.99Data updated 2026-09-13
    App details
  9. HyTools app icon

    HyTools

    IMI Hydronic Engineering International SA

    ★ 4.05 ratingsProductivityFreeData updated 2026-09-08
    App details
  16. CalcEngineer app icon

    CalcEngineer

    Justin Bush

    Calculate CFM, size compressors, analyze pressure drops

    Calculate CFM requirements for air actuators with real-time results. Size compressors and air receiver tanks based on system needs. Analyze pressure drops and optimize pneumatic systems with engineering-grade calculations.

    ★ 5.02 ratingsProductivityFreeData updated 2026-09-06
    App details

How we rank alternatives

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