# Home

### Integrated Scheme development environment for macOS and iOS

*LispPad* is a simple, lightweight, integrated development environment for developing and running Scheme code on macOS and iOS. The [language supported by LispPad](https://www.lisppad.app/applications/language) is based on the [R7RS standard](http://www.r7rs.org/) of the Scheme programming language. LispPad provides the following components:

* A fully integrated Scheme interpreter (based on the [LispKit engine](https://github.com/objecthub/swift-lispkit))
* A large range of [supported libraries](https://www.lisppad.app/applications/libraries)
* A text editor supporting syntax highlighting, smart indentation, parenthesis matching, text completion, page guides, etc.
* A console with a read-eval-print loop
* Support for networking, audio, graphics, compression, Markdown, SQLite, etc.

*LispPad* is free and comes in two version: [*LispPad* for macOS](https://www.lisppad.app/releases/lisppad) and [*LispPad Go* for iOS](https://www.lisppad.app/releases/lisppad-go). The two versions can synchronize their programs, libraries and assets via iCloud. You can download a [reference manual](https://zenger.org/lisppad/assets/LispPad_Reference_2.2.pdf) documenting all the core LispPad libraries.

Please consider joining the [LispPad mailing-list](https://groups.google.com/a/objecthub.com/g/lisppad).

### LispPad on macOS

[![](https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2FmyWHdUxDPecra4Ug5Aql%2FMacAppStore.png?alt=media\&token=72d9c3fc-b7d5-4111-a166-fe97b0ea3d04)](https://apps.apple.com/de/app/lisppad/id1258939760?l=en\&mt=12)

<div><figure><img src="https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2FclAuTrOiPGXvIvOrYnXK%2FLispPad_1s.jpg?alt=media&#x26;token=c082ec9b-0223-46a3-9367-881752dc8d3b" alt=""><figcaption><p>LispPad session and environment browser</p></figcaption></figure> <figure><img src="https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2FwhC5ZUqLYhwZH0upoCkV%2FLispPad_4s.jpg?alt=media&#x26;token=45ef8315-2f3e-4afd-81e1-80d6a20c81ca" alt=""><figcaption><p>LispPad editor and tools</p></figcaption></figure> <figure><img src="https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2FvJgmnhZNcioDeJGpKtmI%2FLispPad_3s.jpg?alt=media&#x26;token=d5cf0320-c681-4527-b3a7-6ddd49362511" alt=""><figcaption><p>Graphics windows and the help system</p></figcaption></figure> <figure><img src="https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2Fi2nx9ysQcA5PR4dB3mNK%2FLispPad_2s.jpg?alt=media&#x26;token=6258c6f7-c1fd-408c-99ff-d44feead459f" alt=""><figcaption><p>Using sessions and editors side-by-side</p></figcaption></figure></div>

### LispPad on iOS

[![](https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2FK6d2y1pAbR37hgxQzkJa%2FAppStore.png?alt=media\&token=520d7d4c-a36f-42cf-8e1b-6c3a75ad3fc8)](https://apps.apple.com/us/app/lisppad-go/id1565747728)

<div><figure><img src="https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2FOFf6PnC0UT8EreoRb9fK%2FIMG_5700.jpg?alt=media&#x26;token=01649f91-f21d-40d9-bde2-89917e54d4fe" alt=""><figcaption><p>Session view</p></figcaption></figure> <figure><img src="https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2FG2w66c4e0sj7vooOz9YZ%2FIMG_5701.jpg?alt=media&#x26;token=5b80b9a8-0f29-465b-8547-d81ddcc933b4" alt=""><figcaption><p>Library browser</p></figcaption></figure> <figure><img src="https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2F9QAs2WehMFwnZmDJ15ul%2FIMG_5704.jpg?alt=media&#x26;token=6b2e210a-1a5f-4688-b5ab-0798edccbcc8" alt=""><figcaption><p>Documentation viewer</p></figcaption></figure> <figure><img src="https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2Fqe6ZSmeVeMJjJKvY3klx%2FIMG_5705.jpg?alt=media&#x26;token=0c1eac59-342a-48ec-b16e-a960adad7335" alt=""><figcaption><p>Graphics in sessions</p></figcaption></figure></div>

<div><figure><img src="https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2FxKgsgCwqcaox00kYdu6N%2FIMG_5706.jpg?alt=media&#x26;token=936158bb-d9b8-451b-ad74-3dbab8e90ad5" alt=""><figcaption><p>Program editor</p></figcaption></figure> <figure><img src="https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2FI7ucgptsBm36pLbfctLJ%2FIMG_5707.jpg?alt=media&#x26;token=1f94db17-84db-4f53-b22b-036d4be9e863" alt=""><figcaption><p>Definition browser</p></figcaption></figure> <figure><img src="https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2FpR1W5afQ4SFvRs7eiZiV%2FIMG_5708.jpg?alt=media&#x26;token=f6720c2f-be62-4be3-a2e8-0f06fd8fe364" alt=""><figcaption><p>File browser</p></figcaption></figure> <figure><img src="https://1467949168-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fna2foeoaXHYkSD3fhs0t%2Fuploads%2FPw0O7cpksxSuzVRTkbqR%2FIMG_5709.jpg?alt=media&#x26;token=2dd3b7c2-3fd0-46f7-8087-9fe00cb036dc" alt=""><figcaption><p>Settings</p></figcaption></figure></div>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://www.lisppad.app/readme.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.