diff --git a/src/AsyncClient.php b/src/AsyncClient.php
index 3d27112dfd..686623bbed 100644
--- a/src/AsyncClient.php
+++ b/src/AsyncClient.php
@@ -151,6 +151,11 @@ public function rateLimit(): PromiseInterface
         return $this->client->handle(new Command\RateLimitCommand());
     }
 
+    public function app(): PromiseInterface
+    {
+        return $this->client->handle(new Command\AppCommand());
+    }
+
     public function renderMarkdown(
         ReadableStreamInterface $stream,
         string $mode = 'markdown',
diff --git a/src/CommandBus/Command/AppCommand.php b/src/CommandBus/Command/AppCommand.php
new file mode 100644
index 0000000000..5ce3ba3098
--- /dev/null
+++ b/src/CommandBus/Command/AppCommand.php
@@ -0,0 +1,12 @@
+<?php declare(strict_types=1);
+
+namespace ApiClients\Client\Github\CommandBus\Command;
+
+use WyriHaximus\Tactician\CommandHandler\Annotations\Handler;
+
+/**
+ * @Handler("ApiClients\Client\Github\CommandBus\Handler\AppHandler")
+ */
+final class AppCommand
+{
+}
diff --git a/src/CommandBus/Handler/AppHandler.php b/src/CommandBus/Handler/AppHandler.php
new file mode 100644
index 0000000000..965213f3bc
--- /dev/null
+++ b/src/CommandBus/Handler/AppHandler.php
@@ -0,0 +1,41 @@
+<?php declare(strict_types=1);
+
+namespace ApiClients\Client\Github\CommandBus\Handler;
+
+use ApiClients\Client\Github\CommandBus\Command\AppCommand;
+use ApiClients\Client\Github\Resource\AppInterface;
+use ApiClients\Tools\Services\Client\FetchAndHydrateService;
+use React\Promise\PromiseInterface;
+use function React\Promise\resolve;
+
+final class AppHandler
+{
+    /**
+     * @var FetchAndHydrateService
+     */
+    private $service;
+
+    /**
+     * RateLimitHandler constructor.
+     * @param FetchAndHydrateService $service
+     */
+    public function __construct(FetchAndHydrateService $service)
+    {
+        $this->service = $service;
+    }
+
+    /**
+     * @param  AppCommand $command
+     * @return PromiseInterface
+     */
+    public function handle(AppCommand $command): PromiseInterface
+    {
+        return resolve(
+            $this->service->fetch(
+                'app',
+                '',
+                AppInterface::HYDRATE_CLASS
+            )
+        );
+    }
+}
diff --git a/src/Resource/App.php b/src/Resource/App.php
new file mode 100644
index 0000000000..fb030b0955
--- /dev/null
+++ b/src/Resource/App.php
@@ -0,0 +1,173 @@
+<?php declare(strict_types=1);
+
+namespace ApiClients\Client\Github\Resource;
+
+use ApiClients\Foundation\Hydrator\Annotation\EmptyResource;
+use ApiClients\Foundation\Hydrator\Annotation\Nested;
+use ApiClients\Foundation\Resource\AbstractResource;
+use DateTimeInterface;
+
+/**
+ * @Nested(
+ *     owner="User"
+ * )
+ * @EmptyResource("EmptyApp")
+ */
+abstract class App extends AbstractResource implements AppInterface
+{
+    /**
+     * @var int
+     */
+    protected $id;
+
+    /**
+     * @var string
+     */
+    protected $slug;
+
+    /**
+     * @var User
+     */
+    protected $owner;
+
+    /**
+     * @var string
+     */
+    protected $name;
+
+    /**
+     * @var string
+     */
+    protected $description;
+
+    /**
+     * @var string
+     */
+    protected $external_url;
+
+    /**
+     * @var string
+     */
+    protected $html_url;
+
+    /**
+     * @var DateTimeInterface
+     */
+    protected $created_at;
+
+    /**
+     * @var DateTimeInterface
+     */
+    protected $updated_at;
+
+    /**
+     * @var array
+     */
+    protected $permissions;
+
+    /**
+     * @var array
+     */
+    protected $events;
+
+    /**
+     * @var int
+     */
+    protected $installations_count;
+
+    /**
+     * @return int
+     */
+    public function id(): int
+    {
+        return $this->id;
+    }
+
+    /**
+     * @return string
+     */
+    public function slug(): string
+    {
+        return $this->slug;
+    }
+
+    /**
+     * @return User
+     */
+    public function owner(): User
+    {
+        return $this->owner;
+    }
+
+    /**
+     * @return string
+     */
+    public function name(): string
+    {
+        return $this->name;
+    }
+
+    /**
+     * @return string
+     */
+    public function description(): string
+    {
+        return $this->description;
+    }
+
+    /**
+     * @return string
+     */
+    public function externalUrl(): string
+    {
+        return $this->external_url;
+    }
+
+    /**
+     * @return string
+     */
+    public function htmlUrl(): string
+    {
+        return $this->html_url;
+    }
+
+    /**
+     * @return DateTimeInterface
+     */
+    public function createdAt(): DateTimeInterface
+    {
+        return $this->created_at;
+    }
+
+    /**
+     * @return DateTimeInterface
+     */
+    public function updatedAt(): DateTimeInterface
+    {
+        return $this->updated_at;
+    }
+
+    /**
+     * @return array
+     */
+    public function permissions(): array
+    {
+        return $this->permissions;
+    }
+
+    /**
+     * @return array
+     */
+    public function events(): array
+    {
+        return $this->events;
+    }
+
+    /**
+     * @return int
+     */
+    public function installationsCount(): int
+    {
+        return $this->installations_count;
+    }
+}
diff --git a/src/Resource/AppInterface.php b/src/Resource/AppInterface.php
new file mode 100644
index 0000000000..6569510b1f
--- /dev/null
+++ b/src/Resource/AppInterface.php
@@ -0,0 +1,71 @@
+<?php declare(strict_types=1);
+
+namespace ApiClients\Client\Github\Resource;
+
+use ApiClients\Foundation\Resource\ResourceInterface;
+use DateTimeInterface;
+
+interface AppInterface extends ResourceInterface
+{
+    const HYDRATE_CLASS = 'App';
+
+    /**
+     * @return int
+     */
+    public function id(): int;
+
+    /**
+     * @return string
+     */
+    public function slug(): string;
+
+    /**
+     * @return User
+     */
+    public function owner(): User;
+
+    /**
+     * @return string
+     */
+    public function name(): string;
+
+    /**
+     * @return string
+     */
+    public function description(): string;
+
+    /**
+     * @return string
+     */
+    public function externalUrl(): string;
+
+    /**
+     * @return string
+     */
+    public function htmlUrl(): string;
+
+    /**
+     * @return DateTimeInterface
+     */
+    public function createdAt(): DateTimeInterface;
+
+    /**
+     * @return DateTimeInterface
+     */
+    public function updatedAt(): DateTimeInterface;
+
+    /**
+     * @return array
+     */
+    public function permissions(): array;
+
+    /**
+     * @return array
+     */
+    public function events(): array;
+
+    /**
+     * @return int
+     */
+    public function installationsCount(): int;
+}
diff --git a/src/Resource/Async/App.php b/src/Resource/Async/App.php
new file mode 100644
index 0000000000..b1a82ef3d3
--- /dev/null
+++ b/src/Resource/Async/App.php
@@ -0,0 +1,13 @@
+<?php declare(strict_types=1);
+
+namespace ApiClients\Client\Github\Resource\Async;
+
+use ApiClients\Client\Github\Resource\App as BaseApp;
+
+class App extends BaseApp
+{
+    public function refresh(): App
+    {
+        throw new \Exception('TODO: create refresh method!');
+    }
+}
diff --git a/src/Resource/Async/EmptyApp.php b/src/Resource/Async/EmptyApp.php
new file mode 100644
index 0000000000..970cccd298
--- /dev/null
+++ b/src/Resource/Async/EmptyApp.php
@@ -0,0 +1,9 @@
+<?php declare(strict_types=1);
+
+namespace ApiClients\Client\Github\Resource\Async;
+
+use ApiClients\Client\Github\Resource\EmptyApp as BaseEmptyApp;
+
+class EmptyApp extends BaseEmptyApp
+{
+}
diff --git a/src/Resource/EmptyApp.php b/src/Resource/EmptyApp.php
new file mode 100644
index 0000000000..d48fd448c3
--- /dev/null
+++ b/src/Resource/EmptyApp.php
@@ -0,0 +1,105 @@
+<?php declare(strict_types=1);
+
+namespace ApiClients\Client\Github\Resource;
+
+use ApiClients\Foundation\Resource\EmptyResourceInterface;
+use DateTimeInterface;
+
+abstract class EmptyApp implements AppInterface, EmptyResourceInterface
+{
+    /**
+     * @return int
+     */
+    public function id(): int
+    {
+        return null;
+    }
+
+    /**
+     * @return string
+     */
+    public function slug(): string
+    {
+        return null;
+    }
+
+    /**
+     * @return User
+     */
+    public function owner(): User
+    {
+        return null;
+    }
+
+    /**
+     * @return string
+     */
+    public function name(): string
+    {
+        return null;
+    }
+
+    /**
+     * @return string
+     */
+    public function description(): string
+    {
+        return null;
+    }
+
+    /**
+     * @return string
+     */
+    public function externalUrl(): string
+    {
+        return null;
+    }
+
+    /**
+     * @return string
+     */
+    public function htmlUrl(): string
+    {
+        return null;
+    }
+
+    /**
+     * @return DateTimeInterface
+     */
+    public function createdAt(): DateTimeInterface
+    {
+        return null;
+    }
+
+    /**
+     * @return DateTimeInterface
+     */
+    public function updatedAt(): DateTimeInterface
+    {
+        return null;
+    }
+
+    /**
+     * @return array
+     */
+    public function permissions(): array
+    {
+        return null;
+    }
+
+    /**
+     * @return array
+     */
+    public function events(): array
+    {
+        return null;
+    }
+
+    /**
+     * @return int
+     */
+    public function installationsCount(): int
+    {
+        return null;
+    }
+}
diff --git a/src/Resource/Sync/App.php b/src/Resource/Sync/App.php
new file mode 100644
index 0000000000..77378b57ea
--- /dev/null
+++ b/src/Resource/Sync/App.php
@@ -0,0 +1,17 @@
+<?php declare(strict_types=1);
+
+namespace ApiClients\Client\Github\Resource\Sync;
+
+use ApiClients\Client\Github\Resource\App as BaseApp;
+use ApiClients\Client\Github\Resource\AppInterface;
+use ApiClients\Foundation\Hydrator\CommandBus\Command\BuildAsyncFromSyncCommand;
+
+class App extends BaseApp
+{
+    public function refresh(): App
+    {
+        return $this->wait($this->handleCommand(new BuildAsyncFromSyncCommand(self::HYDRATE_CLASS, $this))->then(function (AppInterface $app) {
+            return $app->refresh();
+        }));
+    }
+}
diff --git a/src/Resource/Sync/EmptyApp.php b/src/Resource/Sync/EmptyApp.php
new file mode 100644
index 0000000000..1dedc492b5
--- /dev/null
+++ b/src/Resource/Sync/EmptyApp.php
@@ -0,0 +1,9 @@
+<?php declare(strict_types=1);
+
+namespace ApiClients\Client\Github\Resource\Sync;
+
+use ApiClients\Client\Github\Resource\EmptyApp as BaseEmptyApp;
+
+class EmptyApp extends BaseEmptyApp
+{
+}
diff --git a/yaml/app.yml b/yaml/app.yml
new file mode 100644
index 0000000000..ba2d0258a7
--- /dev/null
+++ b/yaml/app.yml
@@ -0,0 +1,17 @@
+class: App
+properties:
+  id: int
+  slug: string
+  owner:
+    type: User
+    annotations:
+      nested: User
+  name: string
+  description: string
+  external_url: string
+  html_url: string
+  created_at: DateTimeInterface
+  updated_at: DateTimeInterface
+  permissions: array
+  events: array
+  installations_count: int