Electronics Circuit Calc Pro vs iSmith
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- 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
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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
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Verdict
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
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.
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.
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.
| Parameter | Electronics Circuit Calc Pro | iSmith |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.3 (3 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 31 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Anas Abubakar | Ryoun Chon Shin |
Customer experience
Electronics Circuit Calc Pro
iSmith
In-app purchases
Electronics Circuit Calc Pro
No in-app purchases
iSmith
No in-app purchases
Questions
Is Electronics Circuit Calc Pro free?
Is iSmith free?
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