update: Document Android Private Space and preference for it over Shelter

docs/android/general-apps.md

@@ -31,6 +31,8 @@ We recommend a wide variety of Android apps throughout this site. The apps liste
 
 ### Shelter
 
+If your device is on Android 15 or greater, we recommend using the native [Private Space](../os/android-overview.md#private-space) feature instead, which provides nearly the same functionality without needing to place trust in and grant powerful permissions to a third-party app.
+
 <div class="admonition recommendation" markdown>
 
 ![Shelter logo](../assets/img/android/shelter.svg){ align=right }
@@ -48,12 +50,12 @@ Shelter supports blocking contact search cross profiles and sharing files across
 <div class="admonition warning" markdown>
 <p class="admonition-title">Warning</p>
 
-Shelter is recommended over [Insular](https://secure-system.gitlab.io/Insular) and [Island](https://github.com/oasisfeng/island) as it supports [contact search blocking](https://secure-system.gitlab.io/Insular/faq.html).
-
 When using Shelter, you are placing complete trust in its developer, as Shelter acts as a [Device Admin](https://developer.android.com/guide/topics/admin/device-admin) to create the Work Profile, and it has extensive access to the data stored within the Work Profile.
 
 </div>
 
+Shelter is recommended over [Insular](https://secure-system.gitlab.io/Insular) and [Island](https://github.com/oasisfeng/island) as it supports [contact search blocking](https://secure-system.gitlab.io/Insular/faq.html).
+
 ### Secure Camera
 
 <div class="admonition recommendation" markdown>

docs/os/android-overview.md

@@ -91,19 +91,27 @@ Privacy-friendly apps such as [Bitwarden](https://reports.exodus-privacy.eu.org/
 
 ### User Profiles
 
-Multiple user profiles can be found in **Settings** → **System** → **Multiple users** and are the simplest way to isolate in Android.
+Multiple **user profiles** can be found in :gear: **Settings** → **System** → **Users** and are the simplest way to isolate in Android.
 
-With user profiles, you can impose restrictions on a specific profile, such as: making calls, using SMS, or installing apps on the device. Each profile is encrypted using its own encryption key and cannot access the data of any other profiles. Even the device owner cannot view the data of other profiles without knowing their password. Multiple user profiles are a more secure method of isolation.
+With user profiles, you can impose restrictions on a specific profile, such as: making calls, using SMS, or installing apps. Each profile is encrypted using its own encryption key and cannot access the data of any other profiles. Even the device owner cannot view the data of other profiles without knowing their password. Multiple user profiles are a more secure method of isolation.
 
 ### Work Profile
 
-[Work Profiles](https://support.google.com/work/android/answer/6191949) are another way to isolate individual apps and may be more convenient than separate user profiles.
+[**Work Profiles**](https://support.google.com/work/android/answer/6191949) are another way to isolate individual apps and may be more convenient than separate user profiles.
 
 A **device controller** app such as [Shelter](../android/general-apps.md#shelter) is required to create a Work Profile without an enterprise MDM, unless you're using a custom Android OS which includes one.
 
 The work profile is dependent on a device controller to function. Features such as *File Shuttle* and *contact search blocking* or any kind of isolation features must be implemented by the controller. You must also fully trust the device controller app, as it has full access to your data inside the work profile.
 
-This method is generally less secure than a secondary user profile; however, it does allow you the convenience of running apps in both the work and personal profiles simultaneously.
+This method is generally less secure than a secondary user profile; however, it does allow you the convenience of running apps in both the owner profile and work profile simultaneously.
+
+### Private Space
+
+**Private Space** is a feature introduced in Android 15 that adds another way of isolating individual apps. You can set up a private space in the owner profile by navigating to :gear: **Settings** → **Security & privacy** → **Private space**. Once set up, your private space resides at the bottom of the app drawer.
+
+Like user profiles, a private space is encrypted using its own encryption key, and you have the option to set up a different unlock method. Like work profiles, you can use apps from both the owner profile and private space simultaneously. Apps launched from a private space are distinguished by an icon depicting a key within a shield.
+
+Unlike work profiles, Private Space is a feature native to Android that does not require a third-party app to manage it. For this reason, we generally recommend using a private space over a work profile, though you can use a work profile alongside a private space.
 
 ### VPN Killswitch