# Digital Circuit Simulator Lite — DigicalSim Lite : logic gates

> Digital circuit simulator for learning logic gates and digital engineering. (iPhone/iPad app by Amran AlQasmi.)

- Source: https://appshunter.io/ios/app/digital-circuit-simulator-lite/id1131088003 (this page in markdown: same URL + `.md`)
- Developer: [Amran AlQasmi](https://appshunter.io/developer/887076277)
- Category: Education, Utilities
- Price: Free
- Rating: 2.83/5 from 29 App Store ratings · 27 written reviews indexed
- Age rating: 4+
- Requires: iOS 7.0 · 37 MB
- Languages: English
- Released: 2016-07-06
- Data updated: 2026-07-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/digital-circuit-simulator-lite/id1131088003/reviews.md

## What is Digital Circuit Simulator Lite?

DigicalSim (formerly: iLogicDesigner) is a full featured app which assists students in logic design, digital engineering, computer science and mathematics.
The app based on basic digital building blocks, logic gates. No knowledge of logic gates or digital circuits is required.
It offers the basic building blocks, wiring tools and a flexible plane to create live real-time digital circuits, ideal for anyone who wants to learn the basic principles of how computers work - especially students of digital engineering, learn how to create simple logic gates, latches, flip-flops, adders, shift registers and counters. it can help them perform complete lab experiments.

► Features: 
- AND, NAND, OR, NOR, XOR, XNOR, Buffer, NOT, j-k Flip-Flop, D Flip-Flop, T Flip-Flop, Switch, Clock, Vcc, GND, VLink-Out, VLink-In, LED, 7-Segment Display, LED Stack Bar, and Label.
- Flood gates (3 & 4) inputs for the gates (AND, NAND, OR, NOR, XOR, XNOR).
- Multi-Color smooth curved wires.
- Ability to add Virtual Links for tidy circuits.
- Unlimited scrollable plane space, for extra large projects.
- Run mode for clean circuit look, while operating live.
- Circuit Lock, for safe Run.
- Two switch operation modes (Toggle or Pulse).
- Switchable synchronized digital waveform clock generators. with adjustable frequency.
- Switches can be linked to work exclusively together.
- Both Positive edge & Negative edge triggering supported for flip-flops, with indicator.
- Configurable LED light color.
- Live value indicators at each leg, for easy analysis.
- Customizable tag for elements.
- Customizable labels can be added anywhere.
- Design-Time snap grid for easier alignment and cleaner look.
- Zoom in & out, Also can be automatically zoomed to Show Circuit extents.
- Persistent Circuit, it saves current circuit automatically to be completed later.
- Save and load circuits using file manager.
- A library of ready made circuit examples for quick jump start.
- Circuits Can be shared and printed.
- Re-assignable circuit diagram origin.
- Append another circuit to the current circuit.
- Highlight the gate wirings while dragged.
- Select, deselect, duplicate, move & delete gates in groups.
- Groups of elements can have distinctive Color and Label with customizable font and font color.
- Auto scroll the plane when reach the edged while wiring, dragging or selecting.
- Elastic selection rectangle to easily select elements.
- Undo functionality, with 10 steps backward.
- Direct wiring to use with Apple Pen.
- Support to Pick'n Drop.
- Boolean function viewer for each Gates & LED, while in run mode.
- Live Timeline Viewer.

## Key features

- Logic gate simulation (AND, OR, NOT, etc.)
- Real-time circuit building and testing
- Virtual wiring and link tools
- Unlimited scrollable design plane
- Circuit lock for safe operation
- Synchronized digital waveform clock generators
- Save, load, share, and print circuits

## Recent user reviews (10 of 27)

All indexed reviews: https://appshunter.io/ios/app/digital-circuit-simulator-lite/id1131088003/reviews.md

### 2/5 — Extremely buggy

*2023-11-11, version 4.5*

Constantly crashes whenever you duplicate, save schematic, etc

### 1/5 — Can’t build big circuits

*2023-07-08*

I was going to build a 4 bit adder but by the time I got to the tenth item it was locked behind a paywall, would not get app.

### 2/5 — Expensive

*2023-03-12*

Tou can barely do anything because of the item limit. Which you have to pay for

### 4/5 — It’s a good app but

*2022-03-03*

Any time you try to connect something the wires take forever to find the hit box that allows for wires to be connected

### 1/5 — Garbage waste of time

*2020-05-06*

Everything locked

**Developer response:** Explain your comment please, how everything is locked?, you may tapped the lock button at the lower left corner by mistake..
Please Rate fairly..

### 1/5 — Free version doesn’t let you preview any functionality

*2020-04-29*

What am I supposed to do with this thing?  I can’t drop a single gate or circuit?  How am O supposed to get a feel for whether it’s worth paying for?

**Developer response:** you supposed to simulate a complete digital logic circuit, the gates can be added or dropped from the gates menu on the upper toolbar.. just tap 'Gates' menu, and either double tab a gate  to drop it, or long tab a gate until it appears under your finger ready to drag it in drag mode..
Help sheet & Help balloons are there  to guid you..
Please re-rate fairly..

### 5/5 — Great App!

*2020-04-13*

Overall I was really impressed with this app. Some of the controls a little funky to get used to, but it’s definitely worth it to see the logic gate circuits actually working. The best part was seeing the clock timeline and how it all looked together.

### 1/5 — Taking “lite” way too far

*2019-10-10, version 4.4*

Limit of 10 gates per schematic is ridiculously limited even for a lite version

### 3/5 — Good, yet expensive

*2019-10-10*

It’s a nice app, and I got used to it fairly quickly, yet it’s $8.00 for the full thing. I will consider buying it later as it is late at night, but other than that, keep up the good work!

### 2/5 — Lite

*2019-05-08, version 4.4*

Please let me know im limited to few gates when getting the app..

## Frequently asked questions about Digital Circuit Simulator Lite

### What is Digital Circuit Simulator Lite?

Digital Circuit Simulator Lite is an application designed to assist students in learning logic design, digital engineering, computer science, and mathematics. It allows users to create and simulate live digital circuits using basic building blocks like logic gates, without requiring prior knowledge of these concepts.

### What are the key features of this app?

The app includes a wide range of logic gates (AND, OR, NOT, XOR, etc.), flip-flops, switches, clocks, and displays. It offers features like multi-color wires, virtual links, an unlimited design plane, circuit lock, synchronized clock generators, and the ability to save, load, share, and print circuits.

### Is this app free to use?

Yes, the application is available for free. There are no in-app purchases or advertisements mentioned, indicating a completely free user experience.

### Who is the target audience for this app?

This app is primarily aimed at students studying digital engineering, computer science, and mathematics who need to learn about logic gates and digital circuit design. It's also beneficial for anyone wanting to understand the fundamental principles of how computers work.

### Can I perform lab experiments with this app?

Yes, the app is designed to help users perform complete lab experiments related to digital circuits. It allows for the creation of simple logic gates, latches, flip-flops, adders, shift registers, and counters, providing a practical learning environment.

## Version history (last 5 releases)

### 4.5 — 2019-11-28

- Added Tri-State Buffer with pull-up & pull-down.
- Added Tri-State NOT Gate with pull-up & pull-down.
- Added Buzzer with independent serial.
- Added independent serial for LEDs.
- Added Hex Digit Display (it was BCD).
- Added optional Clock input for the J-K Flip-Flop.
- Added optional Clear input for both the D and T Flip-Flops.
- Added more Example libraries.
- More Organized menus.
- Some UI Tweaks.
- Updated App Icon.
- Updated App Info.
- iOS 13 Compatibility.
- Some fixed bugs.

### 4.4 — 2019-01-10

- iOS 12.x Compatibility.
- iPhone X, Xs, Xs Plus, Xs Max, XR; Top notch compatibility.
- Minor UI Corrections.

### 4.3 — 2018-07-23

- Adjusting Some UI elements.
- Adjusting labels of some circuit components to be more adjacent to each others when in run mode.
- Correct some font sizes when printing.
- Other minor tweaks.

### 4.2 — 2018-05-31

- Hotfix Timeline when recursive wiring is used.
- Hotfix App Lockup when acquiring The Boolean Function Box if recursive wiring is used.

### 4.1 — 2018-05-30

- Fixing bug in which Links not appended with circuits that appended.
- Fixing bug in which Groups and Links not duplicated with gates.
- Fixing bug in which Serialization not worked properly for duplicated gates.
- Fixing bug in which Deletion of switches not deleting Links associated with it.

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All apps by Amran AlQasmi: https://appshunter.io/developer/887076277

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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 2026-07-05.*