iCircuit

iCircuit

Real-time circuit simulator

131 ratings
408 reviews
#56 in paid Productivity
📚 Education
📊 Productivity
$12.99
In-App Purchases

Details

  • Released
  • Updated
  • July 29, 2010
  • March 18, 2026
iCircuit video #1 for iPhone
iCircuit screenshot #2 for iPhone
iCircuit screenshot #3 for iPhone
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iCircuit screenshot #6 for iPhone
iCircuit screenshot #7 for iPhone
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About

Design and simulate analog and digital electronic circuits in real-time. This app offers a comprehensive component library, built-in test equipment, and the ability to create custom elements. It's ideal for learning, prototyping, and validating designs without physical components.

Real-time circuit simulation
Extensive component library (300+)
Built-in test equipment (multimeter, oscilloscope)
Programmable Arduino and PIC microcontroller support
Custom element creation and sharing
Audio simulation
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What users say

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What's New in iCircuit

1.15.2

March 18, 2026

This small update fixes signing into the iCircuit Gallery to upload custom elements and fixes the link to the iCircuit Manual. 1.15.1: Fixes the lasso selection tool, fixes crashes on iOS 12 devices, fixes thumbnail generation, and it fixes the D12 port label on Arduino Nanos # Version 1.5 Updates This major update brings powerful new analysis tools, expanded microcontroller support, and numerous improvements. ## Bode Plot Analysis Unlock frequency response analysis with new Bode plot capabilities! Visualize how your circuits respond across frequencies with magnitude and phase plots. Perfect for analyzing filters, amplifiers, and frequency-dependent circuits. See cutoff frequencies, gain characteristics, and phase relationships at a glance. ## Expanded Microcontroller Support - **Arduino Mega** - Build bigger projects with 54 digital I/O pins and 16 analog inputs - **Arduino Nano** - Compact board ideal for small-scale applications - **ESP32 and ESP8266** - Enhanced support for popular IoT microcontrollers ## New Circuit Elements - **AC Motor** - Single phase AC induction motor - **Barrel Connector** - Professional DC power jack for your circuits with configurable shunt terminal - **Improved Power Supply Jack** with better connection handling ## Quick Search Find circuit elements faster than ever! New search bar lets you instantly locate components without scrolling through categories. Just start typing and get to building. ## Voltage Monitoring Protect your circuits with automatic under-voltage and over-voltage warnings. Get notified when components are operating outside their safe voltage ranges, helping prevent damage to sensitive ICs and ensuring reliable operation. ## Element Library Organization - New Microcontroller category for better organization - Improved element filtering options - Elements sorted by Pro availability for easier discovery ## Bug Fixes - Fixed photodiode and photoresistor light source selection - Removed false capacitor loop errors that prevented valid circuits from running - Added input voltage tolerance for digital ICs to prevent spurious warnings from minor voltage fluctuations - Better handling of Arduino EEPROM and multiple board types Thank you for your continued support! Whether you're learning electronics, prototyping professional designs, or just having fun building circuits, we hope v1.15 makes your experience even better.

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Subscription plans

iCircuit Pro (Monthly)

Access all pro features paying monthly

$1.991 Month
How to cancel iCircuit subscription ⁉️

Charts

Top Paid

📈 56+76

Productivity

This app rose +76 positions in Productivity chart.

Last updated on July 19, 2026.

User reviews

Almost great

I would pay for the pro. But honestly, even the small list of components isn’t worth it. It’s missing so much.

Paying monthly/annually isn’t worth the money. I want to see prolong degradation of circuits and overheating. I want to know if my design will fail.

So much potential but not worth paying for.
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Great App for electrical and electronic circuit simulation

I have tried several apps for circuit simulation, but iCircuit is the best among them. Thank you to the developer for providing such a fantastic app.

Select by lasso bug

I am leaving this 1 until you fix your lasso selection bug. It’s impossible to highlight certain components

Amazing application

Best app in App Store for an EE. From a licensed engineer with a masters in electrical engineering. Super well built, easy to prototype on the go.

Developer has my Respect.

Excellent

I wait n wait for that other company very big ? Never have they seen a mac NOR an iPhone … but hey iCircuit has been on my list , i will never ever be able to thank you enough,

Developer apps

User experience

🐞

Reported Bugs

4 issues

Oscilloscope and meter functions not working properly

Bug

Saving and loading circuits can be unreliable

Bug

Inconsistent behavior when rotating/flipping components

Bug

Crashes when working with larger or more complex circuits

Bug

Requested Features

5 requests

More components (e.g. transformers, triodes, MOSFETs)

Feature

Ability to create custom components

Feature

Frequency domain analysis (Bode plots, FFT)

Feature

Improved wiring and component placement controls

Feature

Better support for AC circuits and motors

Feature

FAQ

What does iCircuit do?

iCircuit is an application for designing and simulating analog and digital electronic circuits in real-time. It allows users to build circuits with a vast array of components, connect them, adjust properties, and instantly see the results of their designs.

What are the key features of iCircuit?

Key features include a real-time simulation engine, over 300 components in its library (including Arduinos and microcontrollers), built-in test equipment like a multimeter and oscilloscope, the ability to create and share custom elements, and audio simulation capabilities.

Is iCircuit free to use?

iCircuit is a paid application with a one-time purchase. While there is an optional 'iCircuit Pro' for additional components, the core simulation and everyday circuit design functionalities are available with the initial purchase.

What devices is iCircuit compatible with?

The application is designed for iPhone and iPad devices, leveraging their touch interfaces for intuitive circuit design and manipulation.

Who would benefit from using iCircuit?

This app is perfect for students who are learning about electronics, hobbyists who are prototyping their own projects, and engineers who need to validate their designs before building them physically, all without the risk of damaging components.