# DCircuit Lab

> Digital circuit simulator for combinatorial and sequential logic design. (iPhone/iPad app by Fabrizio Boco.)

- Source: https://appshunter.io/ios/app/dcircuit-lab/id382544208 (this page in markdown: same URL + `.md`)
- Developer: [Fabrizio Boco](https://appshunter.io/developer/466239616)
- Category: Productivity, Education
- Price: $3.99
- Rating: 3.00/5 from 3 App Store ratings · 9 written reviews indexed
- Age rating: 17+
- Requires: iOS 17.0 · 3 MB
- Languages: American English, Italian
- Released: 2010-07-23
- Data updated: 2026-08-23
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/dcircuit-lab/id382544208/reviews.md

## What is DCircuit Lab?

DCircuit Lab is a tool to simulate combinatorial and sequential digital circuits.

Circuits can be simulated in two ways:

1) one single step: all the outputs values are evaluated at the same time

2) step by step: outputs and gates are evaluated one step a time

If circuit contains clock inputs, its simulation is dynamic. This means that outputs change accordingly to the clocks. During this dynamic simulation, user can change inputs values to study the circuit behavior which is also provided via a timing chart.

Circuits are built using basic components, gates and flip-flops:

   * inputs (three state: 1, 0, X - undefined)
   * outputs
   * wires
   * NOT, AND, NAND, OR, NOR, XOR gates with any number of inputs
   * Flip-flop RS, JK, T, D (Positive or Negative Edge Triggered and with Set and Reset Inputs)
   * Multiplexers with any number of inputs
   * Demultiplexers with any number of outputs
   * Fully configurable Clocks
   * Custom Components defined by their truth table
   * BCD to 7 Segments Display Decoder
   * 7 Segments Display

Some video tutorials are available directly from the application to learn how to use it.

## Key features

- Combinatorial and sequential circuit simulation
- Single-step and step-by-step simulation modes
- Dynamic simulation with timing charts
- Wide range of logic gates and flip-flops
- Custom component creation via truth tables
- Integrated video tutorials

## Recent user reviews (9 of 9)

All indexed reviews: https://appshunter.io/ios/app/dcircuit-lab/id382544208/reviews.md

### 1/5 — My

*2014-08-25*

Complete waste of money!!! Almost impossible to use, keeps on crashing and has a very limited selection of circuits!

### 1/5 — Brakes when i want to build an input :(

*2013-10-23*

I can't build circuits on my 3GS!!!!
When I want to set an input app closes and some gates DON'T work!!
Pls update then 5 stars

### 2/5 — Mostly unusable

*2012-07-08*

If you tap on the name of a circuit on the Available Circuits display (the initial display), up pops a dialog box that lets you change the name (the current name  is in the text field in the dialog box). If you don't change the name, the circuit is silently deleted. That tells you everything you need to know about how little effort has gone into making this app usable.

### 2/5 — Update for iPad 2

*2011-04-19*

Program works ok. Update for HD on ipad2.

### 5/5 — AESOME!!!

*2011-02-10*

This is the perfect app for any logic circuit creator. This is awesome!

### 2/5 — Needs subcircuits

*2010-10-17*

Without the ability to include circuits within circuits, not very useful.

### 1/5 — Crashing!!!!!!!!!!

*2010-09-30*

It crashes! No fix yet!!!!!!!!!!!

### 1/5 — Crashing

*2010-09-25*

It crashes way too much!  Needs to be able to give you an equation at the end!

### 1/5 — Bad

*2010-09-22*

Really bad app. Hard to use, interface is confusing. Do not recommend this app.

## Frequently asked questions about DCircuit Lab

### What types of circuits can DCircuit Lab simulate?

DCircuit Lab allows for the simulation of both combinatorial and sequential digital circuits. This includes a wide array of components like logic gates, flip-flops, multiplexers, and custom components defined by truth tables.

### How does DCircuit Lab handle dynamic simulations?

When a circuit contains clock inputs, DCircuit Lab performs dynamic simulations. Outputs change in response to the clocks, and users can alter input values during this process to observe circuit behavior on a timing chart.

### What components are available in DCircuit Lab?

The app offers a comprehensive set of components including inputs (1, 0, X), outputs, wires, various logic gates (NOT, AND, NAND, OR, NOR, XOR), multiple types of flip-flops (RS, JK, T, D), multiplexers, demultiplexers, configurable clocks, custom components, and BCD to 7 Segment Decoders.

### Does DCircuit Lab offer learning resources?

Yes, DCircuit Lab includes video tutorials directly within the application. These tutorials are designed to help users learn how to effectively use the simulation tools and features.

### What is the price of DCircuit Lab?

DCircuit Lab is a paid application, priced at $3.99. This one-time purchase grants access to all its simulation and design features.

### On which devices can DCircuit Lab be used?

DCircuit Lab is compatible with both iPhone and iPad devices. It is designed to leverage the capabilities of Apple's mobile and tablet hardware.

### How often is DCircuit Lab updated?

The latest version of DCircuit Lab is 3.1, which was last updated on November 7, 2023. This indicates a history of ongoing development and maintenance for the application.

### What is the age rating for DCircuit Lab?

DCircuit Lab has an age rating of 17+. This is likely due to the technical nature of digital circuit design and simulation, which may require a certain level of understanding.

## Version history (last 5 releases)

### 3.1 — 2023-11-07

- Completely redesigned
- Components with any number of inputs and/or outputs
- Custom Components
- Built In Flip-Flops can now be Positive or Negative Edge Triggered and have Set and Reset Inputs
- BCD to 7 Segments Display Decoder
- 7 Segments Display
- New Video Tutorials

### 2.1 — 2023-02-21

Support for Dark Mode
Performance improvements

### 2.0 — 2019-10-25

Compatible with iOS 13
New graph feature to see the signals over time
Bug Fixing

### 1.7 — 2016-09-20

New interface
Updated to iOS10

### 1.6 — 2014-09-09

- Minor bugs fixed 
- iOS 7 optimization 
- Ready for next iOS version

## Apps similar to DCircuit Lab

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [TeX Writer - LaTeX On The Go](https://appshunter.io/ios/app/tex-writer-latex-on-the-go/id552717222) | 4.1 (112) | $14.99 | Productivity |
| [Sankey Diagram](https://appshunter.io/ios/app/sankey-diagram/id866376517) | 4.0 (2) | $9.99 | Productivity |
| [Engine Horsepower Calculator](https://appshunter.io/ios/app/engine-horsepower-calculator/id1095000562) | 4.2 (6) | $2.99 | Productivity |
| [Bolt Torque](https://appshunter.io/ios/app/bolt-torque/id702964576) | 5.0 (1) | $9.99 | Productivity |
| [VerbTeX Pro LaTeX Editor](https://appshunter.io/ios/app/verbtex-pro-latex-editor/id560872078) | 4.1 (22) | $8.99 | Productivity |
| [power grid calculator](https://appshunter.io/ios/app/power-grid-calculator/id1567786064) | — | Free | Productivity |

## More apps by Fabrizio Boco

- [Matrix Lab](https://appshunter.io/ios/app/matrix-lab/id337754158)
- [DCircuit Lab HD](https://appshunter.io/ios/app/dcircuit-lab-hd/id392966166)
- [Bode & Nyquist](https://appshunter.io/ios/app/bode-and-nyquist/id445573307)
- [Arduino Manager](https://appshunter.io/ios/app/arduino-manager/id497240094)
- [Logic Analyzer](https://appshunter.io/ios/app/logic-analyzer/id980880317)

All apps by Fabrizio Boco: https://appshunter.io/developer/466239616

## Related topics

[digital logic design](https://appshunter.io/ios/topics/digital-logic-design)

---

*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 2026-08-23.*