Comparison

Electronics Circuit Calc Pro vs iSmith

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

Head to head
About

Electronics Circuit Calc Pro

This app provides a comprehensive suite of calculators and design tools for electronic engineering projects. It assists with circuit design, filter analysis, and calculations for various components like resistors, capacitors, and inductors. Ideal for both professionals and students, it simplifies complex electronic tasks.

Highlights
  • Circuit design tools
  • Filter design with graph plotting
  • Resistor, capacitor, inductor design
  • Amplifier calculations
  • Ohm's Law calculator
  • 555 timer calculator
  • PCB trace width calculator
Features
Read full description

Electronic Circuit Calculator is a powerful electronics toolkit combining circuit calculators, circuit analysis, design tools, and interactive simulations in one app. Built for electronics and electrical engineering students, hobbyists, technicians, and engineers, it helps you calculate, analyze, design, and explore electronic circuits. CIRCUIT ANALYSIS & THEORY • Thevenin Theorem • Norton Theorem • Kirchhoff’s Current Law (KCL) • Kirchhoff’s Voltage Law (KVL) • Nodal Analysis • Mesh Analysis • Ohm’s Law • Voltage Divider • Series and Parallel Circuits • RLC Resonance INTERACTIVE CIRCUIT SIMULATIONS Explore electronics with interactive simulations that help you understand circuit behavior. • Buck Converter Simulation • Boost Converter Simulation • Sawtooth Generator Circuit • AND, OR, NAND and NOR Gate Simulations • Shift Register Simulations • Multiplexer (MUX) • Demultiplexer (DEMUX) • Counter IC • PISO and SIPO Simulations POWER ELECTRONICS • Buck Converter Calculator • Boost Converter Calculator • Buck and Boost Simulations DIGITAL ELECTRONICS • Karnaugh Map • Decimal to Binary Converter • Logic Gate Simulations • Multiplexer and Demultiplexer • Counter IC • Shift Registers • PISO and SIPO OP AMP & ANALOG ELECTRONICS • Inverting Amplifier • Non-Inverting Amplifier • Differential Amplifier • Summing Amplifier • Integrator • Differentiator • Comparator • Schmitt Trigger TRANSISTOR, MOTOR & AMPLIFIER TOOLS • Transistor Amplifier Calculator • Transistor Design Tools • Motor Calculations • Stepper Motor Tools • Servo Motor Tools • Power Dissipation FILTER DESIGN • Sallen-Key Active Filters • Butterworth Filters • Chebyshev Filters • Bessel Filters • Band-Pass Filters • Band-Reject Filters • Crossover Filters Graphical visualization is available for supported filter calculations. RESISTOR, CAPACITOR & INDUCTOR TOOLS • Resistor Colour Code • SMD Resistor Code • Resistors in Series and Parallel • Resistor Ratio • LED Series Resistor • Star-Delta / Delta-Star Converter • Pi, Tee and Bridged-Tee Attenuators • Capacitors in Series and Parallel • Capacitor Charge • Capacitor Code • Capacitive Reactance • Inductive Reactance • Inductor Design OTHER ELECTRONICS TOOLS • 555 Timer — Astable and Monostable • Adjustable Voltage Regulator • PCB Trace Width Calculator • Microstrip Trace Width and Impedance • Skin Depth • Coaxial Cable Impedance • Power Calculator • Decibel Converter • Decibel to Watt and Watt to Decibel Electronic Circuit Calculator is useful for circuit analysis, circuit theory, electronic design, electrical calculations, digital electronics, power electronics, filter design, transistor calculations, op amp calculations, and electronics engineering study. Whether you are solving Thevenin, Norton, KCL, KVL, nodal or mesh problems, designing filters and amplifiers, or experimenting with digital ICs and converter simulations, the app brings your essential electronics tools together in one place. Calculate circuits. Analyze networks. Simulate electronics. Learn by interacting.

About

iSmith

This app helps users understand impedance matching principles. It allows for reading key network parameters from a Smith chart and calculating various matching networks and pads. Users can also convert between different power and voltage units.

Highlights
  • Read Smith chart parameters (Z, Y, VSWR, Q, Gamma)
  • Calculate 8 L-matching networks
  • Calculate T & Pi matching pads
  • Set matching targets on Smith chart
  • Learn impedance matching principles
  • dBm, Watts, and Volts conversion
  • VSWR conversion
Features
Read full description

Features: - Read out Z, Y, VSWR, Q and Gamma from smith chart. - Calculate 8 L-matching networks. - Set matching target by touching smith chart. - Calculate T & Pi matching pad. - Learn the principle of impedance matching. - dBm, Watts and Volts conversion - VSWR Conversion

Screenshots

Electronics Circuit Calc Pro4 screens
iSmith4 screens

Verdict

The call

The clearest difference is price: iSmith at Free against Electronics Circuit Calc Pro's $4.99. iSmith also leads on rating (5.0 vs 4.3) and update cadence (every 2 days vs every 2 months). Electronics Circuit Calc Pro's advantage is ads (none vs shown) and ratings volume (3 vs 1). On in-app purchases, device support and iOS requirement 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

iSmith is free to download; Electronics Circuit Calc Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

iSmith holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

UpkeepUpdate frequency

Electronics Circuit Calc Pro ships an update every 2 months, iSmith every 2 days. The most recent releases landed on September 27, 2026 and June 6, 2026 respectively.

Scorecard6 real differences · 4 level
Electronics Circuit Calc Pro versus iSmith: the parameters behind the verdict, then further details
ParameterElectronics Circuit Calc ProiSmith
Price$4.99Free — better
Rating4.3 (3 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings3 — better1
Update frequencyEvery 2 monthsEvery 2 days — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidAd-supported — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size31 MB7 MB
Age rating4+4+
DeveloperAnas AbubakarRyoun Chon Shin

Customer experience

Electronics Circuit Calc Pro

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive0.0%
Neutral25.0%
Negative75.0%

iSmith

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Electronics Circuit Calc Pro

No in-app purchases

None

iSmith

No in-app purchases

Questions

Is Electronics Circuit Calc Pro free?
Electronics Circuit Calc Pro costs $4.99, with no in-app purchases.
Is iSmith free?
iSmith is free to download, with no in-app purchases.
Which has better reviews, Electronics Circuit Calc Pro or iSmith?
iSmith is rated higher. Electronics Circuit Calc Pro averages 4.3 out of 5 from 3 ratings, while iSmith averages 5.0 from 1 ratings.
Do Electronics Circuit Calc Pro or iSmith have ads?
iSmith shows ads; Electronics Circuit Calc Pro does not.
Which is updated more often, Electronics Circuit Calc Pro or iSmith?
Electronics Circuit Calc Pro ships an update every 2 months, and iSmith every 2 days. Most recently, Electronics Circuit Calc Pro was updated on September 27, 2026 and iSmith on June 6, 2026.

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