# Electronic Circuit Calculator — Transistor, Op Amp & Filters

> Electronic engineering calculator and design tool for circuits and components. (iPhone/iPad app by Anas Abubakar.)

- Source: https://appshunter.io/ios/app/electronic-circuit-calculator/id1583972990 (this page in markdown: same URL + `.md`)
- Developer: [Anas Abubakar](https://appshunter.io/developer/1581534101)
- Category: Utilities, Education
- Price: Free with in-app purchases
- Rating: 4.00/5 from 5 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 37 MB
- Languages: American English
- Released: 2021-09-02
- Data updated: 2026-09-27
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/electronic-circuit-calculator/id1583972990/reviews.md

## What is Electronic Circuit Calculator?

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

- Comprehensive calculator collection
- Filter design with graph plotting
- Resistor, transistor, capacitor design tools
- Amplifier and inductor design
- Circuit analysis and design
- Offline functionality

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Upgrade to the Pro version | $2.99 | one-time |


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/electronic-circuit-calculator/id1583972990/reviews.md

### 1/5 — 回路設計をさせてほしい

*2026-05-13*

回路を作れたらなー

### 4/5 — 没有5环电阻

*2024-10-18*

没有5环电阻

### 1/5 — 全是广告

*2024-09-15*

全部是广告，整个软件进去全是广告，还不如直接说这App是广告App，垃圾App，下载安装日期。2024年9月🈷️下载与安装

### 3/5 — Не работает

*2023-11-20*

Не работает расчет гасящего сопротивления для светодиода даже на про версии

### 1/5 — 垃圾

*2023-06-28*

谁看见这条评论还下载我笑话他一辈子

### 1/5 — 广告太多

*2023-03-25*

即使广告播放后，软件也无法正常运行

### 1/5 — 全是广告，打开就是30秒广告还关不了。

*2023-02-26*

全是广告，打开就是30秒广告还关不了，这是广告软件里面集成了一个电路砖家。

## Frequently asked questions about Electronic Circuit Calculator

### What types of calculators does Electrocalc offer?

Electrocalc offers a wide range of calculators including resistor color codes, Ohm's Law, filter designs (Butterworth, Chebyshev, Bessel), amplifier calculations, and impedance calculators for various wire types and PCB traces.

### Can I design filters with Electrocalc?

Yes, Electrocalc features filter design tools that allow you to plot graphs, making it easier to visualize your calculations for Sallen-Key active filters, band pass, and band reject filters.

### Is Electrocalc available offline?

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

### What devices is Electrocalc compatible with?

Electrocalc is compatible with iPhone, iPad, and iPod devices.

### How often is Electrocalc updated?

The latest version is 6, and the app was last updated on April 16, 2025, indicating active development and maintenance.

### What is the age rating for Electrocalc?

Electrocalc has an age rating of 4+, making it suitable for a wide range of users, including younger learners.

### Does Electrocalc have ads?

No, Electrocalc does not contain advertisements, providing an uninterrupted user experience.

### What is the user rating for Electrocalc?

Electrocalc has a rating of 4.0 stars based on 4 ratings, suggesting positive user reception.

## Version history (last 5 releases)

### 10.2 — 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

### 10 — 2026-08-05

Few bugs fixed

### 9 — 2026-07-04

Few bugs fixed

### 8 — 2026-06-29

few bug fixed, improved the UI

### 7 — 2026-06-24

Bugs fixed, improves the UI and added more content/tools

## 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)
- [Electronics Circuit Calc Pro](https://appshunter.io/ios/app/electronics-circuit-calc-pro/id1583600520)
- [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

## Related topics

[ordinateur](https://appshunter.io/ios/topics/ordinateur) · [electronica](https://appshunter.io/ios/topics/electronica)

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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.*