# LoCAD Lite

> Digital circuit design and simulation software with graphical visualization. (iPhone/iPad app by Karl-Heinz Loch.)

- Source: https://appshunter.io/ios/app/locad-lite/id912211392 (this page in markdown: same URL + `.md`)
- Developer: [Karl-Heinz Loch](https://appshunter.io/developer/909594001)
- Category: Education, Productivity
- Price: Free
- Rating: 4.50/5 from 2 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.7 · 12 MB
- Languages: English, German
- Released: 2014-09-03
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/locad-lite/id912211392/reviews.md

## What is LoCAD Lite?

LoCAD is a software for designing and simulating digital circuits.
Special emphasis is given to simple creation and graphical visualization of a circuit's functioning.

The inputs and outputs of the elements can be wired quite simply.
Usually, two touches are sufficient. The system searches a convenient way by itself.

In the simulation, you can watch the current flow and thus follow the cycle of state changes.
This way, your understanding of a circuit's functioning is enhanced, and your perception of circuit faults is improved.

It is possible to produce your own elements (ICs) with discretionary levels of nesting.
Like this, you can build big and complex circuits in a clearly arranged way. During the simulation, you can watch the state changes in all ICs.

A detailed introduction facilitates your familiarisation with the software.
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In the lite version, the number of usable elements is reduced to 13 elements per circuit.
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## Key features

- Graphical circuit design
- Simulation with current flow visualization
- Customizable integrated circuits (ICs)
- Nesting for complex designs
- Simplified wiring with auto-pathfinding
- Detailed introduction guide

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/locad-lite/id912211392/reviews.md

### 1/5 — Crashes constantly

*2021-04-28*

The app crashes before you can do anything

**Developer response:** Despite multiple attempts, I cannot reproduce this error.

### 4/5 — Needs More Components

*2016-09-22*

This app needs more components, like NAND, NOR, XOR, and XNOR gates. It really does need JK, SR, T, and D flip-flops. Also, SR NOR & NAND latches.

### 5/5 — Great

*2014-09-18*

Even with the limits that are placed on the lite version, there are many simple logic circuits that this can simulate. Once you get the hang of it, it is pretty easy.

## Frequently asked questions about LoCAD Lite

### What is LoCAD Lite?

LoCAD Lite is a free application for designing and simulating digital circuits. It focuses on easy creation and graphical visualization of how circuits function, allowing users to see current flow and state changes.

### What are the limitations of LoCAD Lite?

In the lite version, the number of usable elements per circuit is restricted to 13. This version is designed for simpler designs or introductory learning.

### How does LoCAD Lite help with learning?

The app enhances understanding of circuit functioning by allowing users to watch the current flow and state changes during simulation. This visual feedback also improves the perception of circuit faults.

### Can I create complex circuits with LoCAD Lite?

Yes, you can build complex circuits by creating your own custom integrated circuits (ICs) with nested levels. This allows for a more organized approach to designing large and intricate circuits.

### Is LoCAD Lite suitable for beginners?

The application includes a detailed introduction to help users familiarize themselves with the software. Its simplified wiring and graphical visualization are designed to make circuit design accessible.

### What devices does LoCAD Lite support?

LoCAD Lite is available for Mac and iPad devices. It was last updated on July 7, 2025, with version 8.2.3.

### What is the user rating for LoCAD Lite?

LoCAD Lite has a high user rating of 4.5 stars based on 2 ratings. The app is rated for ages 4 and up.

### Does LoCAD Lite have ads?

No, LoCAD Lite does not contain advertisements. It is a free application without in-app purchases or ads.

## Version history (last 5 releases)

### 8.2.3 — 2025-07-07

Due to a programming error in version 8.2.2, a continuous cycle on the iPad cannot be canceled with the on/off switch.

### 8.2.2 — 2025-07-02

This update fixes minor bugs and improves performance thanks to your feedback.

### 8.2.1 — 2024-10-03

This update 
• prevents the incorrect error message “A problematic connecting line was found” that may occur in edit mode
• fixes an error caused by the adaptation to iPadOS 17.6.x when
	> selecting lines in edit mode
	> creating ICs
	> stopping the clock generator via the stop input

### 8.2 — 2024-10-01

This update fixes the problem 
• that in operating mode, the crosshairs only appear in the magnifying glass when it is moved slightly. 
• that the new setting options (see version 8.0) can lead to irritating signal sequences when using a clock generator due to unfavorable overlapping.

### 8.1 — 2024-09-26

This update fixes the error 
• that occurs in continuous clock mode for clock pulses with a phase setting of 1:12.
• that the buttons for cycles and frequency are not activated at the end of a cycle sequence.

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## More apps by Karl-Heinz Loch

- [LoCAD](https://appshunter.io/ios/app/locad/id909593998)
- [Twist.It](https://appshunter.io/ios/app/twistit/id951343823)
- [Card2Memory](https://appshunter.io/ios/app/card2memory/id1003066716)
- [EqualizeMusic](https://appshunter.io/ios/app/equalizemusic/id6503642121)

All apps by Karl-Heinz Loch: https://appshunter.io/developer/909594001

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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 2026-06-10.*