# Custom Id

You can set a custom id in order to track/target users with id coming from different platforms.

To set a custom id:

```
MBAudience.setCustomID(context: Context, custom_id: String)
```

To remove it:

```
MBAudience.removeCustomID(context: Context)
```

To retrieve the current saved id:

```
MBAudience.getCustomID()
```