> For the complete documentation index, see [llms.txt](https://docs.adpage.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.adpage.io/app-tracking/ga4-app-events.md).

# GA4 app events

Forward Firebase app events from the server container to the GA4 property.

{% hint style="info" %}
**Status: outline.** The sections below hold what we confirmed during the first app implementation. Open points are marked as such. Fill them in as soon as a setup confirms them.
{% endhint %}

## 1. What GA4 needs for app events

Less than the ad platforms. The GA4 App client already recognises the install and the app data stream, so the tag only has to forward the event. No device information or identifier has to be added by hand.

## 2. What you set up on the GA4 side

* An app data stream per platform, iOS and Android separately.
* The server-side Tag Manager setting enabled on both streams.
* Nothing else. The measurement id of the web stream plays no part here.

## 3. Tag configuration

| Field      | Value                                            |
| ---------- | ------------------------------------------------ |
| Tag type   | Google Analytics: GA4                            |
| Trigger    | `Client Name` equals the App client              |
| Event name | Inherit from the incoming event                  |
| Parameters | Inherit, unless the client wants something extra |

This is a second tag next to the existing GA4 web tag, not a change to it. A GA4 tag whose trigger filters on the web client will never fire for app traffic, which is a common reason for "the event is in the container but not in GA4".

**Open:** confirm whether one GA4 tag with two triggers is preferable to two separate tags in containers that serve both sources.

## 4. Identifiers this platform accepts

Not applicable. GA4 uses the Firebase instance id. A `user_id` sent by the app is picked up when the property is configured for it.

## 5. How to test

* GA4 Realtime, filtered on the app platform.
* GA4 DebugView, when the app runs in debug mode.
* The container's outgoing requests, see **Testing and verification**.

## 6. Known errors

**Open:** add the errors observed in practice. So far the pattern seen is not an error but silence, caused by a tag that is not triggered on the App client.

## 7. Limits

* App events and web events stay separate streams within one property. Combining them into one user journey is a reporting question, not a tagging question.
* **Open:** describe how app and web sessions relate in reporting once we have a case to point at.


---

# 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 by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.adpage.io/app-tracking/ga4-app-events.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

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.