> For the complete documentation index, see [llms.txt](https://en.docs.monaca.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://en.docs.monaca.io/products_guide/debugger/custom-build-debugger-for-ios.md).

# Custom Build Debugger for iOS

Monaca Debugger is an application to optimize the testing of apps. With Monaca Debugger, you can instantly check the app's operation on the actual device just by saving the source code. No need to build the app or install it on the device to check its operation.

## Instructions for Use

### 1. Prerequisites 

You need the following certificates to create a custom build debugger. 

Refer to [iOS Build Prerequisites](/build-app/build-for-ios.md) to get the required materials, which are the same as those needed for an iOS Debug build. 

* Private Key 
* Development Certificate 
* Development Provisioning Profile

### 2. Build an App 

Follow the steps below to build the debugger and install it on the physical device. 

1. Log into Monaca Cloud IDE and open the project you want to debug.
2. Select Build > iOS App Build from the IDE menu. 
3. Select Custom Build Debugger, then click Start Build. 
4. Once the build is complete, the built app can be installed to the device using a QR code, or downloaded to a PC as a file.

<figure><img src="/files/zLK5CusE7bzR26DKgNSK" alt=""><figcaption></figcaption></figure>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://en.docs.monaca.io/products_guide/debugger/custom-build-debugger-for-ios.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.