> ## Documentation Index
> Fetch the complete documentation index at: https://docs.goguardian.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Review App Catalog Fields

> Definitions for each App Catalog column in Discover, including how to interpret the values.

This article defines each App Catalog column in GoGuardian Discover. Use it to understand what each field means and how to interpret the values.

## Review App Catalog Fields

| Column          | Definition                                                                              | Format   | Data Notes                                            |
| --------------- | --------------------------------------------------------------------------------------- | -------- | ----------------------------------------------------- |
| App             | The application name Discover uses for grouped usage data                               | Text     | Based on Discover app mapping configuration           |
| Unique Users    | The number of distinct user accounts that opened the app during the selected date range | Number   | Count is per user account                             |
| Avg. Usage Time | The average time a user spent in the app during the selected date range                 | Duration | Display format may vary by environment                |
| Last Used       | The most recent date the app had activity in the selected date range                    | Date     | Based on the latest usage event in the selected scope |

## FAQ

**What does "unique users" count?**

Unique Users counts the number of distinct user accounts with at least one usage event for the app during the selected date range. It doesn't count the number of sessions or devices.

**Why might "Last Used" be blank for an app?**

The app had no usage in the selected date range. Expand the date range to check for earlier activity.

## Resources

* [Browse App Catalog](/products/discover/browse-app-catalog)
* [Identify Underused Apps](/products/discover/identify-underused-apps)