Resistor Tools app icon

Apps Like Resistor Tools for iPhone and iPad

Calculate values in series or parallel

Calculate resistance for series or parallel combinations. Determine pairs to achieve a target resistance. Compute R1/R2 ratios and voltage divider values. Calculate values for inverting amplifier gain. Save results as CSV files.

by Siu Yuen Ho★ 5.010 ratingsUtilitiesFreeData updated 2026-09-09

Resistor Tools screenshots

Ranked alternatives

Showing 81–100 of 1,000 ranked alternatives.

  1. Ohms Law app icon

    Ohms Law

    Pro Certs Software Ltd

    Calculate power, current, resistance, voltage.

    The app calculates voltage, current, resistance, and power. Users input any two values to determine the remaining two using Ohm's Law formulas.

    ★ 4.37 ratingsUtilitiesFreeData updated 2026-10-08
  2. Pupil Distance Meter - Eye PD app icon

    Pupil Distance Meter - Eye PD

    Arthur Eduardo Skaetta Alvarez Desenvolvimento de Software LTDA.

    Measure PD with TrueDepth Camera

    Measure pupillary using iPhone's TrueDepth Camera for accurate results. Display real-time measurements for both near and far sight. Save and share PD values for eyeglasses or VR headset setup.

    ★ 4.6462 ratingsHealth & FitnessFreeData updated 2026-09-06
  3. Ohm & Watt Law Electrical Calc app icon

    Ohm & Watt Law Electrical Calc

    TrothMatrix OPC Private Limited

    Calculate voltage, current, resistance, and power

    Calculate Voltage, Current, Resistance, and Power using Ohm’s Law and ’s Law. Input values to solve for unknowns. Display results instantly. Includes formulas for calculations. Supports both direct and indirect circuit analysis.

    ★ 4.752 ratingsUtilitiesFreeData updated 2026-09-17
  1. Rafter Help app icon

    Rafter Help

    Armchair Engineering

    Calculate roof pitch and length

    Calculate length and associated values for gable roofs. Input room width and ridge height to determine pitch, lengths, and ridge height. Use advanced options to enter pitch in radians, degrees, DMS, or rise/run.

    ★ 4.5213 ratingsUtilities$1.99Data updated 2026-09-10
  2. ArcCalc app icon

    ArcCalc

    Roseller Sunga

    Calculate arc dimensions with two values

    Calculate arc dimensions including radius, length, width, height, apothem, angle, and area. Input any two values to derive the rest. Useful for carpenters, architects, and engineers. Supports complex mathematical calculations.

    ★ 4.8268 ratingsProductivityFreeData updated 2026-09-08
  3. Ohmulator app icon

    Ohmulator

    Armchair Engineering

    Calculate electric circuits using Ohm's Law.

    The app calculates unknown circuit variables using Ohm's Law. It allows users to adjust unit types for input and output values without prior conversion.

    ★ 0.00 ratingsUtilities$0.99Data updated 2026-09-20
  4. Duct Calculator Elite app icon

    Duct Calculator Elite

    Cyberprodigy LLC

    Calculate size, velocity, and pressure drop

    ™ lets users input airflow, velocity, or friction to determine size. Calculate pressure drop and flow rate. Input dimensions for custom shapes. Export results and save calculations.

    ★ 4.8234 ratingsUtilities$9.99Data updated 2026-10-07
  5. Watts Amps Volts  Calculator app icon

    Watts Amps Volts Calculator

    Pro Certs Software Ltd

    Calculate , , and

    Calculate electrical power for single phase systems by converting between , , and . Input values to solve for unknowns. Support for three phase calculations including kilowatts, , , and power factor.

    ★ 4.450 ratingsUtilitiesFreeData updated 2026-09-08
  6. Basic Electronic Calculator app icon

    Basic Electronic Calculator

    Gergely Nagy

    Calculate voltage, current, resistance, and power

    Calculate voltage, current, resistance, or electric power by entering any two values. Convert results between normal and scientific notation. Display calculated values clearly.

    ★ 3.52 ratingsUtilitiesFreeData updated 2026-09-08
  7. Transformer Calculator. app icon

    Transformer Calculator.

    V PUGAZHENTHI

    Calculate currents and determine type

    Calculate primary and secondary full-load currents based on ratings and voltages. Determine turns ratio and type. Input phase type and voltage values to obtain current outputs and ratio calculations.

    ★ 4.848 ratingsUtilitiesFreeData updated 2026-09-24
  8. Mister Battery app icon

    Mister Battery

    He Zhou

    Calculate charging speed and optimize device power

    Measure charging wattage and milliamp rates to assess charging speed. Track charge duration and effectiveness for comparison. Calculate optimal charging combinations for device efficiency.

    ★ 4.5410 ratingsUtilities$2.99Data updated 2026-09-17
  9. Hours & Minutes Calculator app icon

    Hours & Minutes Calculator

    Quackstro, LLC

    Calculate and directly

    Calculate time values by adding, subtracting, and multiplying and . Input time values directly without converting to decimals. Display results in and format.

    ★ 4.2252 ratingsUtilities$1.99Data updated 2026-09-08
  10. dB Meter Sound Level Meter app icon

    dB Meter Sound Level Meter

    Vida Apps Incorporated

    Measure levels in real time

    Measure levels in real time using decibels. Display minimum, average, and maximum values. Stop and reset the measurement. Customize background and text colors.

    ★ 4.7315 ratingsLifestyleFreeData updated 2026-09-06
  11. GOODCAR: Vehicle History Check app icon

    GOODCAR: Vehicle History Check

    Infopay Inc.

    Search VINs, track , lookup license plates

    Look up reports using VIN or license plate. for accidents, salvage records, and odometer readings. Access title brands and sales . Calculate lease and loan payments. View recall information and market values.

    ★ 4.2284 ratingsUtilitiesFreeData updated 2026-09-06
  12. Cross Stitch Calculators app icon

    Cross Stitch Calculators

    Diana Białogrzywa

    Calculate fabric size and material needs

    Calculate fabric size in centimeters or inches based on count and fabric type. Determine thread consumption for specified stitches. Input project details to estimate material needs. Export calculations for reference.

    ★ 4.7320 ratingsLifestyleFreeData updated 2026-09-19
  13. Ohm's Law app icon

    Ohm's Law

    Creature Code Mobile, LLC

    Calculate voltage, current, and resistance

    Calculate electrical values using . Input voltage, current, or resistance to find missing variables. Supports calculations for series and parallel circuits. Includes unit conversion for volts, amps, and ohms.

    ★ 4.7170 ratingsUtilitiesFreeData updated 2026-09-08
  14. Puzzle Sidekick app icon

    Puzzle Sidekick

    Brian Enigma

    Solve puzzles, track clues, decode codes

    Access codebreaking tools like decoder rings and countdown timers. View reference material on word frequency, morse code, and semaphore. Includes links to hunts, ARGs, and transmedia storytelling resources. Supports iOS 7.

    ★ 4.9115 ratingsReferenceFreeData updated 2026-09-08

How we rank alternatives

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