Comparison

RCircuitCalc vs Electronics Engineer Helper

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RCircuitCalc

This app helps engineers and students design electrical and electronic circuits by calculating standard resistance values based on E-series numbers. It supports various circuit types, including voltage dividers, series, parallel, and combination circuits, and can also calculate current and power for each resistor.

Highlights
  • Calculates standard resistance values
  • Supports voltage dividers, series, parallel, and combination circuits
  • Calculates current and power for resistors
  • Outputs resistance values based on E-series numbers (E6, E12, E24, E48, E96)
  • Calculations based on input voltage, output voltage, current, and resistance ratio
Features
Read full description

This application is intend for engineers and students who are wasting time for designing electric and electronic circuits. The standard resistance values based on E-series numbers are outputted in inputting necessary conditions such as input voltage, output voltage, current and so on. Features The calculable circuits are as follows: - Voltage Dividers (Inputting output voltage or resistance ratio) - Series Circuits - Parallel Circuits - Combination Circuits In the Voltage Dividers, resistance values are calculated in entering input voltage, output voltage or resistance ratio, and current into input boxes, besides, the most suitable resistance values are calculated in selecting priority whether Normal or Vout. In the Series Circuits, Parallel Circuits and Combination Circuits, divided resistance values are calculated in entering a combined resistance value into an input box. Calculated resistance values are displayed with the following E-series number specified either. E6, E12, E24, E48, E96 This application is able to calculate current and power of each resistor on calculated resistance values. Attention Because standard resistors are used and precision of calculation is ensured, the following restrictions are set up. - Range of resistance value: 1Ω ~ 10MΩ - Range of resistance ratio: 0.1 ~ 10

About

Electronics Engineer Helper

This app provides a comprehensive suite of calculators and reference tools for electronics enthusiasts and professionals. It includes features for component identification, circuit calculations, and electrical property analysis, aiding in both study and practical work.

Highlights
  • Datasheet search
  • Resistor color code calculator
  • Electronic schematic symbols
  • Pinouts guide
  • Ohm's law calculator
  • AWG converter
  • Unit converter
Features
Read full description

Digital toolbox for electronics engineers and electricians. Calculators and references for beginners and professionals — for work, study, DIY, and repair. Used by over 100,000 users. Completely ad-free. Included tools: • Datasheet search • Equivalent parts search (cross reference for transistors, diodes and ICs) • Resistor color and digit marking (4, 5 and 6 band color code; 2 symbols, 3/4 digit and EIA-96 code SMD resistors code) • Electronic schematic symbols (IEC 60617, IEEE 315 and GOST standards) • Pinouts of connectors and interfaces (USB, HDMI, DisplayPort, DVI, VGA, Thunderbolt, Apple Lightning and 30-pin, SATA, PCI Express and M.2, Ethernet RJ45 with PoE, RJ11/RJ14/RJ25, RS-232/422/485, IEEE 1394 FireWire, ATX, computer fans, SD card, audio jack, RCA, MIDI, XLR, PS/2, D-sub, SMEMA) • Pinouts of boards and microcontrollers (Raspberry Pi and Pico, Arduino, ESP32, ESP8266, STM32 Nucleo, Teensy, Orange Pi, RADXA Rock Pi, LubanCat, Flipper Zero, ATmega and ATtiny) • Ohm's law calculator • AWG converter (wire diameter, cross-section area, resistance and maximum current) • Resistor for LED • Voltage divider • Wheatstone bridge (output voltage or unknown resistance, current and power of every arm) • Capacitor code • Capacitor markings • Capacitor ESR tables • Frequency response curve calculation of passive filters (RC, RL, RLC, LC) • Inductor color code • Air-core coil calculator (inductance or number of turns of a single-layer solenoid) • Ideal transformer (winding turns, voltages and currents) • Linear current regulator • SMD packages list • Reactance • PCB trace resistance • Active, apparent and reactive power • RMS converter (peak, RMS and peak-to-peak values for seven waveform shapes) • 555 waveform generator • Operational amplifiers • RLC circuit • Number conversion • Unit converter • Cable voltage drop • Battery life (runtime of a battery pack, with discharge curve) • NTC thermistor resistance • Logic gates • RC circuit • Decibels calculator • 25-pair cable color code • Fuse color marking Additionally, by purchasing the PRO version of the app, you will get access to additional tools: • SMD components marking codes • Diodes color code (Pro Electron, JEDEC and JIS-C-7012 standards) • Linear voltage regulator • Resistor value to color or SMD code marking converter • Voltage rectifier • Series or parallel electrical components' connection calculator • Diode voltage drop • Minimum PCB trace width • Analog to digital conversion • Attenuators • 4-20 mA signal converter • Thermocouple calculator • Resistance thermometer • Buck switching voltage regulator • Wire resistance • Zener diode regulator (Zener diode and series resistor selection from a catalogue of 438 parts) • Load cell (bridge output voltage to weight, force, pressure or torque) • BJT voltage divider biasing • Transformer turns per volt (from core area, flux density and frequency) • Junction temperature (with or without a heatsink, power derating curve) • Solar string dimensioning (minimum voltage and current ratings for a PV array) • Solar cable and fuse selection (NEC and IEC rules) • 555 astable generator with variable duty cycle • NTC thermistor in a voltage divider and with an ADC input Privacy Policy: https://www.eehelper.app/ios/privacy/ Terms of Use: https://www.eehelper.app/ios/terms/

Screenshots

RCircuitCalc4 screens
Electronics Engineer Helper4 screens

Verdict

The call

The clearest difference is review sentiment: Electronics Engineer Helper at 98% against RCircuitCalc's 0%. Electronics Engineer Helper also leads on price (Free vs $1.99) and rating (4.8 vs 1.0). RCircuitCalc's advantage is in-app purchases (none vs 2) and iOS requirement (13.6 vs 17.0). On ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Electronics Engineer Helper is free to download; RCircuitCalc costs $1.99 up front. Electronics Engineer Helper sells 2 in-app purchases, starting at $4.89 per year. RCircuitCalc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Electronics Engineer Helper holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Electronics Engineer Helper has 443 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 0% of RCircuitCalc's written reviews are positive against 98% of Electronics Engineer Helper's.

UpkeepUpdate frequency

RCircuitCalc ships an update every 17 months, Electronics Engineer Helper monthly. The most recent releases landed on November 6, 2026 and November 11, 2026 respectively.

Scorecard8 real differences · 2 level
RCircuitCalc versus Electronics Engineer Helper: the parameters behind the verdict, then further details
ParameterRCircuitCalcElectronics Engineer Helper
Price$1.99Free — better
Rating1.0 (5 ratings)4.8 (443 ratings) — better
Positive reviews0.0% of reviews97.7% of reviews — better
Number of ratings5443 — better
Update frequencyEvery 17 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS13.6 — better17.0
Further details — not scored
Size7 MB93 MB
Age rating4+12+
DeveloperTAKAHIKO FUKUYAMARostyslav Dovhaliuk

Customer experience

RCircuitCalc

All ratings5 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Electronics Engineer Helper

All ratings440 ratings
Positive97.5%
Neutral1.6%
Negative0.9%
Written reviews173 reviews
Positive97.7%
Neutral0.6%
Negative1.7%

Bugs and requests

RCircuitCalc

Not enough reviews yet to summarise bugs or requests.

Electronics Engineer Helper

Reported bugs

2 issues
  • Incorrect resistor color code display for some values
  • In-app purchase option not working for some users

Requested features

5 requests
  • Add more circuit schematics and examples
  • Include ASCII code to decimal, hex, and octal conversion
  • Expand the pinout section with more details
  • Add active filter (RC, RL, RLC, LC) calculators
  • Include digital to analog converter, transistor, and transformer calculators

In-app purchases

None

RCircuitCalc

No in-app purchases

2 purchases

Electronics Engineer Helper

Subscriptions1
  • 1 Year Subscription1 Month trial$4.891 Year
One-time1
  • Lifetime PRO Version$12.49

Questions

Is RCircuitCalc free?
RCircuitCalc costs $1.99, with no in-app purchases.
Is Electronics Engineer Helper free?
Electronics Engineer Helper is free to download, with in-app purchases available.
Which has better reviews, RCircuitCalc or Electronics Engineer Helper?
Electronics Engineer Helper is rated higher. RCircuitCalc averages 1.0 out of 5 from 5 ratings, while Electronics Engineer Helper averages 4.8 from 443 ratings.
Do RCircuitCalc or Electronics Engineer Helper have ads?
Neither RCircuitCalc nor Electronics Engineer Helper shows ads.
Which is updated more often, RCircuitCalc or Electronics Engineer Helper?
RCircuitCalc ships an update every 17 months, and Electronics Engineer Helper monthly. Most recently, RCircuitCalc was updated on November 6, 2026 and Electronics Engineer Helper on November 11, 2026.

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