diff --git a/src/CrowdinApiClient/Api/ApplicationApi.php b/src/CrowdinApiClient/Api/ApplicationApi.php
index 0afdca8c..470ee7bd 100644
--- a/src/CrowdinApiClient/Api/ApplicationApi.php
+++ b/src/CrowdinApiClient/Api/ApplicationApi.php
@@ -5,6 +5,8 @@
 namespace CrowdinApiClient\Api;
 
 use CrowdinApiClient\Model\ApplicationData;
+use CrowdinApiClient\Model\ApplicationInstallation;
+use CrowdinApiClient\ModelCollection;
 
 /**
  * Use API to manage custom application data.
@@ -76,6 +78,81 @@ public function deleteApplicationData(string $applicationIdentifier, string $pat
         return $this->_delete($url);
     }
 
+    /**
+     * List Application Installations
+     * @link https://developer.crowdin.com/api/v2/#operation/api.applications.installations.getMany API Documentation
+     * @link https://developer.crowdin.com/enterprise/api/v2/#operation/api.applications.installations.getMany API Documentation Enterprise
+     *
+     * @param array $params
+     * integer $params[limit]<br>
+     * integer $params[offset]<br>
+     * integer $params[installedBy]<br>
+     * string $params[orderBy]
+     * @return ModelCollection
+     */
+    public function listInstallations(array $params = []): ModelCollection
+    {
+        return $this->_list('applications/installations', ApplicationInstallation::class, $params);
+    }
+
+    /**
+     * Install Application
+     * @link https://developer.crowdin.com/api/v2/#operation/api.applications.installations.post API Documentation
+     * @link https://developer.crowdin.com/enterprise/api/v2/#operation/api.applications.installations.post API Documentation Enterprise
+     *
+     * @param array $data
+     * string $data[url] required<br>
+     * array $data[permissions]<br>
+     * array $data[modules]<br>
+     * bool $data[assignAgent]
+     * @return ApplicationInstallation|null
+     */
+    public function installApplication(array $data): ?ApplicationInstallation
+    {
+        return $this->_create('applications/installations', ApplicationInstallation::class, $data);
+    }
+
+    /**
+     * Get Application Installation
+     * @link https://developer.crowdin.com/api/v2/#operation/api.applications.installations.get API Documentation
+     * @link https://developer.crowdin.com/enterprise/api/v2/#operation/api.applications.installations.get API Documentation Enterprise
+     *
+     * @param string $identifier
+     * @return ApplicationInstallation|null
+     */
+    public function getInstallation(string $identifier): ?ApplicationInstallation
+    {
+        return $this->_get('applications/installations/' . $identifier, ApplicationInstallation::class);
+    }
+
+    /**
+     * Delete Application Installation
+     * @link https://developer.crowdin.com/api/v2/#operation/api.applications.installations.delete API Documentation
+     * @link https://developer.crowdin.com/enterprise/api/v2/#operation/api.applications.installations.delete API Documentation Enterprise
+     *
+     * @param string $identifier
+     * @param bool $force
+     * @return mixed
+     */
+    public function deleteInstallation(string $identifier, bool $force = false)
+    {
+        $params = $force ? ['force' => true] : [];
+        return $this->_delete('applications/installations/' . $identifier, $params);
+    }
+
+    /**
+     * Edit Application Installation
+     * @link https://developer.crowdin.com/api/v2/#operation/api.applications.installations.patch API Documentation
+     * @link https://developer.crowdin.com/enterprise/api/v2/#operation/api.applications.installations.patch API Documentation Enterprise
+     *
+     * @param ApplicationInstallation $installation
+     * @return ApplicationInstallation|null
+     */
+    public function updateInstallation(ApplicationInstallation $installation): ?ApplicationInstallation
+    {
+        return $this->_update('applications/installations/' . $installation->getIdentifier(), $installation);
+    }
+
     /**
      * Edit Application Data
      * @link https://developer.crowdin.com/api/v2/#operation/api.applications.api.patch API Documentation
@@ -83,7 +160,7 @@ public function deleteApplicationData(string $applicationIdentifier, string $pat
      *
      * @param string $applicationIdentifier
      * @param string $path
-     * @param array $data
+     * @param array $data Application-specific key-value payload (free-form, not RFC 6902 patch operations)
      * @return ApplicationData|null
      */
     public function editApplicationData(string $applicationIdentifier, string $path, array $data): ?ApplicationData
diff --git a/src/CrowdinApiClient/Model/ApplicationInstallation.php b/src/CrowdinApiClient/Model/ApplicationInstallation.php
new file mode 100644
index 00000000..d091dc9a
--- /dev/null
+++ b/src/CrowdinApiClient/Model/ApplicationInstallation.php
@@ -0,0 +1,165 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CrowdinApiClient\Model;
+
+class ApplicationInstallation extends BaseModel
+{
+    /** @var string */
+    protected $identifier;
+
+    /** @var string */
+    protected $name;
+
+    /** @var array|null */
+    protected $installedBy = null;
+
+    /** @var string|null */
+    protected $description = null;
+
+    /** @var string */
+    protected $logo;
+
+    /** @var array|null */
+    protected $agent = null;
+
+    /** @var string */
+    protected $baseUrl;
+
+    /** @var string */
+    protected $manifestUrl;
+
+    /** @var string|null */
+    protected $createdAt = null;
+
+    /** @var array */
+    protected $modules = [];
+
+    /** @var array */
+    protected $scopes = [];
+
+    /** @var array */
+    protected $permissions = [];
+
+    /** @var array */
+    protected $defaultPermissions = [];
+
+    /** @var bool */
+    protected $limitReached;
+
+    /** @var bool */
+    protected $stringBasedAvailable;
+
+    public function __construct(array $data = [])
+    {
+        parent::__construct($data);
+
+        $this->identifier = (string)$this->getDataProperty('identifier');
+        $this->name = (string)$this->getDataProperty('name');
+        $this->installedBy = $this->getDataProperty('installedBy');
+        $this->description = $this->getDataProperty('description');
+        $this->logo = (string)$this->getDataProperty('logo');
+        $this->agent = $this->getDataProperty('agent');
+        $this->baseUrl = (string)$this->getDataProperty('baseUrl');
+        $this->manifestUrl = (string)$this->getDataProperty('manifestUrl');
+        $this->createdAt = $this->getDataProperty('createdAt');
+        $this->modules = (array)$this->getDataProperty('modules');
+        $this->scopes = (array)$this->getDataProperty('scopes');
+        $this->permissions = (array)$this->getDataProperty('permissions');
+        $this->defaultPermissions = (array)$this->getDataProperty('defaultPermissions');
+        $this->limitReached = (bool)$this->getDataProperty('limitReached');
+        $this->stringBasedAvailable = (bool)$this->getDataProperty('stringBasedAvailable');
+    }
+
+    public function getIdentifier(): string
+    {
+        return $this->identifier;
+    }
+
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    /**
+     * @return array|null
+     */
+    public function getInstalledBy(): ?array
+    {
+        return $this->installedBy;
+    }
+
+    public function getDescription(): ?string
+    {
+        return $this->description;
+    }
+
+    public function getLogo(): string
+    {
+        return $this->logo;
+    }
+
+    /**
+     * @return array|null
+     */
+    public function getAgent(): ?array
+    {
+        return $this->agent;
+    }
+
+    public function getBaseUrl(): string
+    {
+        return $this->baseUrl;
+    }
+
+    public function getManifestUrl(): string
+    {
+        return $this->manifestUrl;
+    }
+
+    public function getCreatedAt(): ?string
+    {
+        return $this->createdAt;
+    }
+
+    public function getModules(): array
+    {
+        return $this->modules;
+    }
+
+    public function getScopes(): array
+    {
+        return $this->scopes;
+    }
+
+    public function getPermissions(): array
+    {
+        return $this->permissions;
+    }
+
+    public function getDefaultPermissions(): array
+    {
+        return $this->defaultPermissions;
+    }
+
+    public function isLimitReached(): bool
+    {
+        return $this->limitReached;
+    }
+
+    public function isStringBasedAvailable(): bool
+    {
+        return $this->stringBasedAvailable;
+    }
+
+    public function setPermissions(array $permissions): void
+    {
+        $this->permissions = $permissions;
+    }
+
+    public function setModules(array $modules): void
+    {
+        $this->modules = $modules;
+    }
+}
diff --git a/tests/CrowdinApiClient/Api/ApplicationApiTest.php b/tests/CrowdinApiClient/Api/ApplicationApiTest.php
index 68ad2c16..a2cceef0 100644
--- a/tests/CrowdinApiClient/Api/ApplicationApiTest.php
+++ b/tests/CrowdinApiClient/Api/ApplicationApiTest.php
@@ -5,6 +5,8 @@
 namespace CrowdinApiClient\Tests\Api;
 
 use CrowdinApiClient\Model\ApplicationData;
+use CrowdinApiClient\Model\ApplicationInstallation;
+use CrowdinApiClient\ModelCollection;
 
 class ApplicationApiTest extends AbstractTestApi
 {
@@ -26,6 +28,109 @@ protected function getResponseJson(): string
         ]);
     }
 
+    protected function getInstallationData(): array
+    {
+        return [
+            'identifier' => 'my-app',
+            'name' => 'My Application',
+            'installedBy' => ['id' => 1, 'username' => 'admin'],
+            'description' => 'App description',
+            'logo' => '/resources/images/logo.png',
+            'agent' => null,
+            'baseUrl' => 'https://localhost.dev',
+            'manifestUrl' => 'https://localhost.dev/manifest.json',
+            'createdAt' => '2023-11-29T10:00:00+00:00',
+            'modules' => [],
+            'scopes' => ['application'],
+            'permissions' => ['user' => ['value' => 'all']],
+            'defaultPermissions' => [],
+            'limitReached' => false,
+            'stringBasedAvailable' => false,
+        ];
+    }
+
+    protected function getInstallationResponseJson(): string
+    {
+        return json_encode(['data' => $this->getInstallationData()]);
+    }
+
+    public function testListInstallations(): void
+    {
+        $this->mockRequest([
+            'path' => '/applications/installations',
+            'method' => 'get',
+            'response' => json_encode([
+                'data' => [
+                    ['data' => $this->getInstallationData()],
+                ],
+                'pagination' => [['offset' => 0, 'limit' => 25]],
+            ]),
+        ]);
+
+        $list = $this->crowdin->application->listInstallations();
+
+        $this->assertInstanceOf(ModelCollection::class, $list);
+        $this->assertCount(1, $list);
+        $this->assertInstanceOf(ApplicationInstallation::class, $list[0]);
+        $this->assertEquals('my-app', $list[0]->getIdentifier());
+        $this->assertEquals('My Application', $list[0]->getName());
+    }
+
+    public function testInstallApplication(): void
+    {
+        $this->mockRequest([
+            'path' => '/applications/installations',
+            'method' => 'post',
+            'body' => json_encode(['url' => 'https://localhost.dev/manifest.json']),
+            'response' => $this->getInstallationResponseJson(),
+        ]);
+
+        $installation = $this->crowdin->application->installApplication([
+            'url' => 'https://localhost.dev/manifest.json',
+        ]);
+
+        $this->assertInstanceOf(ApplicationInstallation::class, $installation);
+        $this->assertEquals('my-app', $installation->getIdentifier());
+        $this->assertEquals('My Application', $installation->getName());
+    }
+
+    public function testGetInstallation(): void
+    {
+        $this->mockRequestGet(
+            '/applications/installations/my-app',
+            $this->getInstallationResponseJson()
+        );
+
+        $installation = $this->crowdin->application->getInstallation('my-app');
+
+        $this->assertInstanceOf(ApplicationInstallation::class, $installation);
+        $this->assertEquals('my-app', $installation->getIdentifier());
+        $this->assertEquals('My Application', $installation->getName());
+    }
+
+    public function testDeleteInstallation(): void
+    {
+        $this->mockRequestDelete('/applications/installations/my-app');
+
+        $this->crowdin->application->deleteInstallation('my-app');
+    }
+
+    public function testUpdateInstallation(): void
+    {
+        $this->mockRequestPatch(
+            '/applications/installations/my-app',
+            $this->getInstallationResponseJson()
+        );
+
+        $installation = new ApplicationInstallation($this->getInstallationData());
+        $installation->setPermissions(['user' => ['value' => 'managers']]);
+
+        $result = $this->crowdin->application->updateInstallation($installation);
+
+        $this->assertInstanceOf(ApplicationInstallation::class, $result);
+        $this->assertEquals('my-app', $result->getIdentifier());
+    }
+
     public function testGetApplicationData(): void
     {
         $this->mockRequestGet(
diff --git a/tests/CrowdinApiClient/Model/ApplicationInstallationTest.php b/tests/CrowdinApiClient/Model/ApplicationInstallationTest.php
new file mode 100644
index 00000000..30651d07
--- /dev/null
+++ b/tests/CrowdinApiClient/Model/ApplicationInstallationTest.php
@@ -0,0 +1,126 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CrowdinApiClient\Tests\Model;
+
+use CrowdinApiClient\Model\ApplicationInstallation;
+use PHPUnit\Framework\TestCase;
+
+class ApplicationInstallationTest extends TestCase
+{
+    protected $model;
+
+    protected function setUp(): void
+    {
+        $this->model = new ApplicationInstallation([
+            'identifier' => 'my-app',
+            'name' => 'My Application',
+            'installedBy' => ['id' => 1, 'username' => 'admin'],
+            'description' => 'App description',
+            'logo' => '/resources/images/logo.png',
+            'agent' => null,
+            'baseUrl' => 'https://localhost.dev',
+            'manifestUrl' => 'https://localhost.dev/manifest.json',
+            'createdAt' => '2023-11-29T10:00:00+00:00',
+            'modules' => [['key' => 'module-1', 'type' => 'custom']],
+            'scopes' => ['application'],
+            'permissions' => ['user' => ['value' => 'all'], 'project' => ['value' => 'own']],
+            'defaultPermissions' => ['user' => ['value' => 'all']],
+            'limitReached' => false,
+            'stringBasedAvailable' => true,
+        ]);
+    }
+
+    public function testGetIdentifier(): void
+    {
+        $this->assertEquals('my-app', $this->model->getIdentifier());
+    }
+
+    public function testGetName(): void
+    {
+        $this->assertEquals('My Application', $this->model->getName());
+    }
+
+    public function testGetInstalledBy(): void
+    {
+        $this->assertEquals(['id' => 1, 'username' => 'admin'], $this->model->getInstalledBy());
+    }
+
+    public function testGetDescription(): void
+    {
+        $this->assertEquals('App description', $this->model->getDescription());
+    }
+
+    public function testGetLogo(): void
+    {
+        $this->assertEquals('/resources/images/logo.png', $this->model->getLogo());
+    }
+
+    public function testGetAgent(): void
+    {
+        $this->assertNull($this->model->getAgent());
+    }
+
+    public function testGetBaseUrl(): void
+    {
+        $this->assertEquals('https://localhost.dev', $this->model->getBaseUrl());
+    }
+
+    public function testGetManifestUrl(): void
+    {
+        $this->assertEquals('https://localhost.dev/manifest.json', $this->model->getManifestUrl());
+    }
+
+    public function testGetCreatedAt(): void
+    {
+        $this->assertEquals('2023-11-29T10:00:00+00:00', $this->model->getCreatedAt());
+    }
+
+    public function testGetModules(): void
+    {
+        $this->assertEquals([['key' => 'module-1', 'type' => 'custom']], $this->model->getModules());
+    }
+
+    public function testGetScopes(): void
+    {
+        $this->assertEquals(['application'], $this->model->getScopes());
+    }
+
+    public function testGetPermissions(): void
+    {
+        $this->assertEquals(
+            ['user' => ['value' => 'all'], 'project' => ['value' => 'own']],
+            $this->model->getPermissions()
+        );
+    }
+
+    public function testGetDefaultPermissions(): void
+    {
+        $this->assertEquals(['user' => ['value' => 'all']], $this->model->getDefaultPermissions());
+    }
+
+    public function testIsLimitReached(): void
+    {
+        $this->assertFalse($this->model->isLimitReached());
+    }
+
+    public function testIsStringBasedAvailable(): void
+    {
+        $this->assertTrue($this->model->isStringBasedAvailable());
+    }
+
+    public function testSetPermissions(): void
+    {
+        $newPermissions = ['user' => ['value' => 'managers']];
+        $this->model->setPermissions($newPermissions);
+        $this->assertEquals($newPermissions, $this->model->getPermissions());
+    }
+
+    public function testSetModules(): void
+    {
+        $newModules = [['key' => 'module-2', 'type' => 'custom']];
+        $this->model->setModules($newModules);
+        $this->assertEquals($newModules, $this->model->getModules());
+    }
+}