# LadderTouchLite — graphical programming language

> Graphical programming language learning app for ladder logic basics. (iPhone/iPad app by Motonari Hibi.)

- Source: https://appshunter.io/ios/app/laddertouchlite/id405695274 (this page in markdown: same URL + `.md`)
- Developer: [Motonari Hibi](https://appshunter.io/developer/386737172)
- Category: Developer Tools, Productivity
- Price: Free
- Rating: 4.70/5 from 226 App Store ratings · 26 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.5 · 6 MB
- Languages: American English, Japanese
- Released: 2010-12-09
- Data updated: 2026-08-27
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/laddertouchlite/id405695274/reviews.md

## What is LadderTouchLite?

LadderTouchLite is an app to learn the basics of ladder logic, which is a graphical programming language.
This app has two functions.
You can learn about that mechanism by executing some of the prepared samples. And you can check your understanding with questions.

-------Difference from the full version-------
It doesn't show hints of questions.
You cannot make your own ladders.

---------------ELEMENTS---------------
Input(yellow)
Up to 5 elements.
You can control the input signal by tapping the buttons at the bottom of the display.

Virtual output(red)
Up to 5 elements.

Internal memory(gray)
Up to 20 elements.
Virtual output(red) and internal memory(gray) are the same for logical behavior.
But the difference is in usage. 
The virtual output is the last element in the ladder logic chain.
The Internal memory is for the processing element of the ladder logic chain.
These are an imitation of the actual ladder logic with the output devices.

Timer(blue)
Up to 5 elements.
The timer can be set from 0.1 seconds to 10.0 seconds. The setting unit is 0.1 second.
The timer works only 'on delay'. This app does not include 'off delay'.

On Delay.
 ---++++++++++  source
 -------++++++  destination

Off Delay.
 +++----------  source
 ++++++++-----  destination

+ ON
- OFF
Time flows from left to right

Counter(green)
Up to 5 elements.
You can set from 1 to 50.
There is no counter reset element in this app. Many other ladder logic software has it.
The way to reset the counter is to stop running the ladder.

All elements can be inverse in the source area.
However, timers and counters cannot do it in the destination area.
It is difficult to understand the inverse logic of a timer and counter in the destination area.

--------------Other--------------
There is no function that connects to outer devices.

## Key features

- Learn ladder logic basics
- Execute prepared sample programs
- Test understanding with questions
- Control input signals
- Utilize virtual outputs and internal memory
- Configure timers and counters

## Recent user reviews (10 of 26)

All indexed reviews: https://appshunter.io/ios/app/laddertouchlite/id405695274/reviews.md

### 5/5 — 面白い！

*2025-06-08*

自分も視覚系プログラミング言語っぽいのを開発中ですが
論理系（And ＯＲ　not）　は目から鱗でした
参考にさせていただきます

### 4/5 — Got a call at

*2024-01-17*

I don’t know what

### 5/5 — Know what you said but

*2023-05-26*

But it was just me I

### 4/5 — Just posted an update

*2023-05-24*

Kind and generous person

### 5/5 — Good app for electrical and electronics students

*2022-12-12*

I clear may so many doubts with this app.

### 5/5 — かなりいいと思う

*2021-06-15*

条件等の意味がわかりました

### 4/5 — Muito bom

*2021-06-02*

Gostei

### 5/5 — Great App

*2021-01-22*

Awesome

### 1/5 — I can’t change the language

*2020-05-05*

I couldn’t try the app because it was not possible to change the language from Japanese to English, I’d like some help with that. I want to buy the complete version but I’m scared to buy and not being able to change the language.

**Developer response:** I would expect that your device would be a higher priority for Japanese than English.
Please check the following
Setting(Ajustes) -> General(Geral) -> Language and Region(Idioma e Região) -> PREFERED LANGUAGE ORDER(ORDEM PREFERIDA DOS IDIOMAS)

If you have any questions,
samekard.jp@gmail.com
or
@samekard on Twitter.

Thank you for taking the time to download it.

### 4/5 — ‪スマホでラダー学習できるのは画期的！

*2020-03-04*

ラダーを知らない人にも、気軽に触って貰えるよいきっかけになるアプリだと思いました！

しいて改善点を挙げさせていただくなら、チュートリアルやトレーニングの問題名が、目次を開かないと出てこないので、メイン画面に表示されてるほうが、問題の意図を把握しやすいと感じました

‪また、仕事でシーケンス図やラダー図に少し触れている分、以下の表記法・簡略化がかえって直感的に触りづらいと感じました。‬
‪・出力の表記が"NOT A"形式‬
(シーケンス図でもPLCのラダー図でもしない)
‪・入力も接点も四角‬
(色分けだけだと、直感的に見分けづらい)
‪・入力がオルタネイト‬
(入力を勝手にプッシュボタンとイメージしてますが、一般的に制御ではモーメンタリが多いので入力をコイルと勘違いしやすくなる)

**Developer response:** >問題名をメイン画面に表示
検討しますが一番小さいデバイスでもラダーが十分表示できることが優先になるので難しい面もあります。

入力がオルタネイト‬/モーメンタリは設定で変更できます。

出力への書き込み時にON/OFFを反対に出来る機能は、このアプリ独自の機能です。理由は以下です。
デバイスの画面の横は狭いので、アプリで横長のラダーを作成することができません（作成は有料版の機能です）。横長のラダーをドモルガンの法則によって縦長に出来ると作成できるラダーが広がります。横長から縦長への変更のためにこの機能があります。

他の点は今後の検討項目にします。

## Frequently asked questions about LadderTouchLite

### What is LadderTouchLite?

LadderTouchLite is a mobile application designed to teach the basics of ladder logic, which is a graphical programming language commonly used in industrial automation. It allows users to learn by executing sample programs and testing their knowledge with quizzes.

### What are the key features of LadderTouchLite?

Key features include learning ladder logic fundamentals, executing prepared sample programs, testing understanding with questions, controlling input signals, utilizing virtual outputs and internal memory, and configuring timers and counters. The lite version does not offer hints for questions or the ability to create custom ladder programs.

### Is LadderTouchLite free to use?

Yes, LadderTouchLite is a free application. It does not have in-app purchases or advertisements, making it accessible for users to learn ladder logic without any cost.

### What kind of devices is LadderTouchLite compatible with?

The provided information does not specify exact compatibility details. However, as a mobile application, it is designed to run on smartphones and tablets that support its operating system (typically Android or iOS).

### What are common use cases for learning ladder logic with this app?

This app is ideal for students, aspiring automation engineers, or anyone interested in understanding how Programmable Logic Controllers (PLCs) are programmed. It provides a hands-on introduction to the logic and structure used in industrial control systems.

## Version history (last 5 releases)

### 2.1.5 — 2026-03-04

Supports iPad's compact window.

### 2.1.4 — 2026-01-12

Build in a new environment

### 2.1.3 — 2025-07-14

Organizing the internal structure

### 2.1.2 — 2025-05-08

Rebuilt the foundation from scratch.
Added an English vocabulary app using AppleIntelligence to the “Other Apps” section.
Reduced app size.

### 2.1.1 — 2025-05-05

I have changed the way the app monitors the network to a new method.
It uses network monitoring in review requests and other applications introduction page.

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## More apps by Motonari Hibi

- [LadderTouch](https://appshunter.io/ios/app/laddertouch/id386737169)
- [FindSpeedAnimation](https://appshunter.io/ios/app/findspeedanimation/id504162124)
- [SilentBonusTrack](https://appshunter.io/ios/app/silentbonustrack/id725815269)
- [SilentBonusTrackLite](https://appshunter.io/ios/app/silentbonustracklite/id796302146)
- [NumericTadpole](https://appshunter.io/ios/app/numerictadpole/id972559163)

All apps by Motonari Hibi: https://appshunter.io/developer/386737172

## Related topics

[plc ladder logic](https://appshunter.io/ios/topics/plc-ladder-logic) · [motor control circuits](https://appshunter.io/ios/topics/motor-control-circuits) · [ladder master](https://appshunter.io/ios/topics/ladder-master) · [plc](https://appshunter.io/ios/topics/plc)

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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 2026-08-27.*