# Segments

> Four built-in audiences, and saved segments that filter by language, country, app version, tag, spend and sessions.

URL: https://docs.xulo.io/concepts/segments

An audience decides who gets a push. Push and in-app cards use the same audiences.

## Built-in audiences

Every app has four:

| Audience | Who is in it |
| --- | --- |
| Subscribed | Installs with push allowed and an Apple push token |
| Opened in the last 7 days | Installs that opened the app in the last 7 days |
| Not opened for 30 days | Installs that have not opened the app for 30 days |
| Test devices | Installs you marked with **Add to test devices** |

The first three also appear as saved segments in **Segments** and in the push composer. Test devices is not a saved segment. In the push composer, send to test devices from the **Test devices** window. An in-app card and the REST API can name it as an audience.

A push goes only to subscribed installs, whichever audience you pick.

## Saved segments

In **Segments**, a saved segment starts from Subscribed, Opened in the last 7 days or Not opened for 30 days, and adds filters one row at a time:

- **Language**, from the device language setting
- **Country**, from the device region setting
- **App version**
- **Tag**, one key and value on the person. See [Tags](https://docs.xulo.io/concepts/tags).
- **Spend** in a window: the last 24 hours, the last 7 days, the last 30 days, or all time. Inside the window, pick people who spent, people who did not, or people who spent at least an amount in one currency. Currencies are not converted.
- **Sessions** in the same windows: at least a number of sessions, at least a number of minutes, or both.

The segment editor shows how many installs match before you save. A saved segment can be renamed, changed or deleted.

See [Purchases and sessions](https://docs.xulo.io/concepts/purchases-and-sessions) for how spend and sessions are counted.

## Using a segment

- In the dashboard, choose the audience when you write a push.
- From the REST API, name one segment in `included_segments`, either a built-in name or the name of a saved segment. See [Targeting](https://docs.xulo.io/api/targeting).

## How many devices one send reaches

A push sent now or at a set time goes to every subscribed install in the audience. A push sent **At the same local time** goes to the whole audience of each time zone, sent in the background when the clock in that time zone reaches the chosen time. A device with no time zone is not sent to, and it is not counted as skipped. The push composer shows how many devices the chosen segment matches.

From the REST API, one segment or tag send reaches at most 1,000,000 devices. See [Targeting](https://docs.xulo.io/api/targeting).