diff --git a/types/apple-signin-api/apple-signin-api-tests.ts b/types/apple-signin-api/apple-signin-api-tests.ts
new file mode 100644
index 0000000000..e899b26908
--- /dev/null
+++ b/types/apple-signin-api/apple-signin-api-tests.ts
@@ -0,0 +1,42 @@
+const ClientConfig: AppleSignInAPI.ClientConfigI = {
+    clientId: '',
+    redirectURI: '',
+    scope: '',
+    state: '',
+    usePopup: false,
+};
+
+const signInResponse: AppleSignInAPI.SignInResponseI = {
+    authorization: {
+        state: '[STATE]',
+        code: '[CODE]',
+        id_token: '[ID_TOKEN]',
+    },
+    user: {
+        email: '[EMAIL]',
+        name: {
+            firstName: '[FIRST_NAME]',
+            lastName: '[LAST_NAME]',
+        },
+    },
+};
+
+const signInError: AppleSignInAPI.SignInErrorI = {
+    error: '[ERROR]',
+};
+
+const AuthGood: AppleSignInAPI.AppleID = {
+    auth: {
+        init: () => new Promise(() => {}),
+        signIn: () => new Promise(() => signInResponse),
+        renderButton: () => {},
+    },
+};
+
+const AuthBad: AppleSignInAPI.AppleID = {
+    auth: {
+        init: () => new Promise(() => {}),
+        signIn: () => new Promise(() => signInError),
+        renderButton: () => {},
+    },
+};
diff --git a/types/apple-signin-api/index.d.ts b/types/apple-signin-api/index.d.ts
new file mode 100644
index 0000000000..64443bea19
--- /dev/null
+++ b/types/apple-signin-api/index.d.ts
@@ -0,0 +1,49 @@
+// Type definitions for non-npm package Apple Sign in API 1.4
+// Project: https://developer.apple.com/documentation/signinwithapplejs
+// Definitions by: Julius Lungys <https://github.com/voidpumpkin>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare namespace AppleSignInAPI {
+    // https://developer.apple.com/documentation/signinwithapplejs/authorizationi
+    interface AuthorizationI {
+        code: string;
+        id_token: string;
+        state: string;
+    }
+    // https://developer.apple.com/documentation/signinwithapplejs/namei
+    interface NameI {
+        firstName: string;
+        lastName: string;
+    }
+    // https://developer.apple.com/documentation/signinwithapplejs/signinerrori
+    interface SignInErrorI {
+        error: string;
+    }
+    // https://developer.apple.com/documentation/signinwithapplejs/signinresponsei
+    interface SignInResponseI {
+        authorization: AuthorizationI;
+        user?: UserI;
+    }
+    // https://developer.apple.com/documentation/signinwithapplejs/useri
+    interface UserI {
+        email: string;
+        name: NameI;
+    }
+    // https://developer.apple.com/documentation/signinwithapplejs/authi
+    interface AuthI {
+        init: (config: ClientConfigI) => Promise<void>;
+        signIn: (signInConfig?: ClientConfigI) => Promise<SignInResponseI | SignInErrorI>;
+        renderButton: () => void;
+    }
+    // https://developer.apple.com/documentation/signinwithapplejs/clientconfigi
+    interface ClientConfigI {
+        clientId: string;
+        redirectURI: string;
+        scope: string;
+        state: string;
+        usePopup: boolean;
+    }
+    interface AppleID {
+        auth: AuthI;
+    }
+}
diff --git a/types/apple-signin-api/tsconfig.json b/types/apple-signin-api/tsconfig.json
new file mode 100644
index 0000000000..fb8304e521
--- /dev/null
+++ b/types/apple-signin-api/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "apple-signin-api-tests.ts"
+    ]
+}
diff --git a/types/apple-signin-api/tslint.json b/types/apple-signin-api/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/apple-signin-api/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }