# Electronics Circuit Calc Pro — Transistor, Op Amp & Filters

> Electronic engineering calculator and design tool suite for circuit analysis and component calculations. (iPhone/iPad app by Anas Abubakar.)

- Source: https://appshunter.io/ios/app/electronics-circuit-calc-pro/id1583600520 (this page in markdown: same URL + `.md`)
- Developer: [Anas Abubakar](https://appshunter.io/developer/1581534101)
- Category: Utilities, Education
- Price: $4.99
- Rating: 4.30/5 from 3 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 31 MB
- Languages: German (Germany), American English, French (France), Indonesian, Italian, Japanese, Korean, Dutch, Polish, European Portuguese and 4 more
- Released: 2021-09-01
- Data updated: 2026-09-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/electronics-circuit-calc-pro/id1583600520/reviews.md

## What is Electronics Circuit Calc Pro?

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.

## Key features

- 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

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/electronics-circuit-calc-pro/id1583600520/reviews.md

### 1/5 — 电子分压

*2026-07-19*

没有以前好用，以前可以填写输入电压，输出电压，再写一个分压电阻就可以得出另外一个电阻，现在输出不能改，非常难用

**Developer response:** hi, than you for purchasing the app. please can you update your review as we have added the missing feature in the voltage divider.
Thank you

### 1/5 — 某些计算缺少单位

*2025-06-05*

某些计算单位不同，且没给出需要的单位，不方便

### 3/5 — Help

*2025-02-22*

When calculating a crossover filter the keypad obscures the graph.  How can I close the keypad?

### 1/5 — Too simple, no way to evaluate pro without buying

*2022-11-23*

Like most of these omnibus electronics apps, it covers all the basics and hides all the real calculators behind a paid app. What it doesn’t let you see, however, is that the pro features lack anything but the basic calculations. Bandpass filter calculator? Sure, if one pole and no way to specify the filter type is all you want. 

Sadly this app is like all the others… don’t waste your money. To the developer: spend the time to document what you are providing, offer a trial version of the pro features so we can tell if paying the full price is worth it.

**Developer response:** Hi Akohlsmith  thank you for purchasing Electrocalc- RF tools , Please can you send me the calculators you want to be added to the app via this email anas.saulawa@gmail.com

## Frequently asked questions about Electronics Circuit Calc Pro

### What is Electrocalc?

Electrocalc is an electronic engineering app offering a wide range of calculators and design tools for circuit analysis and component calculations. It helps users tackle various electronic projects with ease.

### What types of calculators does Electrocalc include?

Electrocalc features numerous calculators, including Resistor Colour Code, Ohm's Law, various filter designs (Butterworth, Chebyshev), amplifier calculators, 555 timer calculations, and PCB trace width calculators.

### Is Electrocalc suitable for beginners?

Yes, Electrocalc is designed for both professional electronic engineers and those just starting out. Its comprehensive tools make it a perfect resource for learning and executing electronic designs.

### Does Electrocalc work offline?

Yes, Electrocalc offers offline functionality, allowing you to design and analyze circuits with confidence without an internet connection.

### What devices is Electrocalc available on?

Electrocalc is available for iPhone, iPad, and iPod devices, providing a portable solution for electronic engineering tasks.

### How often is Electrocalc updated?

The app was last updated on March 4, 2025, indicating ongoing development and support for the latest features and bug fixes.

### What is the price of Electrocalc?

Electrocalc is a paid application, available for a one-time purchase of $2.99.

### What is the user rating for Electrocalc?

Electrocalc has a strong user rating of 4.3 stars based on 3 ratings, suggesting positive user experiences with the application.

## Version history (last 5 releases)

### 2.1 — 2026-09-23

What’s New:

• Added Circuit Theory tools for deeper circuit analysis
• Added Schmitt Trigger calculator
• Added Karnaugh Map tools
• Added Boolean to Decimal conversion
• Added new Op Amp tools
• Added Integrator calculator
• Added Differentiator calculator
• Added Summing Amplifier calculator
• Improved overall usability and calculations

### 2 — 2026-08-05

Few bugs fixed

### 1.18 — 2026-07-16

Few bugs fixed

### 1.17 — 2025-03-04

Improved the user interface, added information for the circuits for easy understanding

### 1.16 — 2024-07-12

Ui improvement

## More apps by Anas Abubakar

- [Electronics Tools & Calc Pro](https://appshunter.io/ios/app/electronics-tools-and-calc-pro/id1581668963)
- [Electronics Tools & Calculator](https://appshunter.io/ios/app/electronics-tools-and-calculator/id1581885136)
- [Electronic Circuit Calculator](https://appshunter.io/ios/app/electronic-circuit-calculator/id1583972990)
- [Fisika - Physics app](https://appshunter.io/ios/app/fisika-physics-app/id1586848633)
- [PhysicsLab - Calculator lite](https://appshunter.io/ios/app/physicslab-calculator-lite/id1587705682)

All apps by Anas Abubakar: https://appshunter.io/developer/1581534101

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-27.*