diff --git a/README.md b/README.md
index 9ae1fd9..d936a9f 100644
--- a/README.md
+++ b/README.md
@@ -46,21 +46,23 @@ yarn add @reason-react-native/permissions
 
 ```reason
 open ReactNative;
-open ReactNativePermissions;
 
 let requestCamera = () => {
-  Permissions.request(
-    switch (Platform.os) {
-    | os when os === "ios" => Permissions.Constants.IOS.camera
-    | _ => Permissions.Constants.Android.camera
-    },
-  )
-  |> Js.Promise.then_(permissionStatus =>
-       switch (permissionStatus) {
-       | status when status === Results.granted => Js.Promise.resolve()
-       | _ => Js.Promise.reject(Js.Exn.raiseError("permission error"))
-       }
-     );
+  ReactNativePermissions.(
+    request(
+      switch (Platform.os) {
+      | os when os === "ios" => Ios.camera
+      | _ => Android.camera
+      },
+    )
+    |> Js.Promise.then_(permissionStatus =>
+        switch (permissionStatus) {
+        | status when status === granted => Js.Promise.resolve()
+        | _ => Js.Promise.reject(Js.Exn.raiseError("permission error"))
+        }
+      )
+    )
+  );
 };
 ```
 
diff --git a/src/ReactNativePermissions.bs.js b/src/ReactNativePermissions.bs.js
index 7517a25..705cbf6 100644
--- a/src/ReactNativePermissions.bs.js
+++ b/src/ReactNativePermissions.bs.js
@@ -1,21 +1,10 @@
 'use strict';
 
 
-var IOS = { };
-
 var Android = { };
 
-var Constants = {
-  IOS: IOS,
-  Android: Android
-};
-
-var Results = { };
-
-var $$Permissions = {
-  Constants: Constants,
-  Results: Results
-};
+var Ios = { };
 
-exports.$$Permissions = $$Permissions;
+exports.Android = Android;
+exports.Ios = Ios;
 /* No side effect */
diff --git a/src/ReactNativePermissions.re b/src/ReactNativePermissions.re
index 88b73c1..5767daf 100644
--- a/src/ReactNativePermissions.re
+++ b/src/ReactNativePermissions.re
@@ -1,50 +1,201 @@
-module Permissions = {
-  module Constants = {
-    type t;
-
-    module IOS = {
-      [@bs.module "react-native-permissions"]
-      [@bs.scope ("default", "PERMISSIONS", "IOS")]
-      external camera: t = "CAMERA";
-
-      [@bs.module "react-native-permissions"]
-      [@bs.scope ("default", "PERMISSIONS", "IOS")]
-      external locationAlways: t = "LOCATION_ALWAYS";
-    };
-
-    module Android = {
-      [@bs.module "react-native-permissions"]
-      [@bs.scope ("default", "PERMISSIONS", "ANDROID")]
-      external camera: t = "CAMERA";
-
-      [@bs.module "react-native-permissions"]
-      [@bs.scope ("default", "PERMISSIONS", "ANDROID")]
-      external accessCoarseLocation: t = "ACCESS_COARSE_LOCATION";
-
-      [@bs.module "react-native-permissions"]
-      [@bs.scope ("default", "PERMISSIONS", "ANDROID")]
-      external accessFineLocation: t = "ACCESS_FINE_LOCATION";
-    };
-  };
-
-  module Results = {
-    type t;
-    [@bs.module "react-native-permissions"] [@bs.scope ("default", "RESULTS")]
-    external unavailable: t = "UNAVAILABLE";
-    [@bs.module "react-native-permissions"] [@bs.scope ("default", "RESULTS")]
-    external denied: t = "DENIED";
-    [@bs.module "react-native-permissions"] [@bs.scope ("default", "RESULTS")]
-    external granted: t = "GRANTED";
-    [@bs.module "react-native-permissions"] [@bs.scope ("default", "RESULTS")]
-    external blocked: t = "BLOCKED";
-  };
-
-  [@bs.module "react-native-permissions"] [@bs.scope "default"]
-  external openSettings: unit => Js.Promise.t(unit) = "openSettings";
-
-  [@bs.module "react-native-permissions"] [@bs.scope "default"]
-  external request: Constants.t => Js.Promise.t(Results.t) = "request";
-
-  [@bs.module "react-native-permissions"] [@bs.scope "default"]
-  external check: Constants.t => Js.Promise.t(Results.t) = "check";
+type permission;
+
+module Android = {
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external accept_handover: permission = "ACCEPT_HANDOVER";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external access_background_location: permission =
+    "ACCESS_BACKGROUND_LOCATION";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external access_coarse_location: permission = "ACCESS_COARSE_LOCATION";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external access_fine_location: permission = "ACCESS_FINE_LOCATION";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external activity_recognition: permission = "ACTIVITY_RECOGNITION";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external add_voicemail: permission = "ADD_VOICEMAIL";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external answer_phone_calls: permission = "ANSWER_PHONE_CALLS";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external body_sensors: permission = "BODY_SENSORS";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external call_phone: permission = "CALL_PHONE";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external camera: permission = "CAMERA";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external get_accounts: permission = "GET_ACCOUNTS";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external process_outgoing_calls: permission = "PROCESS_OUTGOING_CALLS";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external read_calendar: permission = "READ_CALENDAR";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external read_call_log: permission = "READ_CALL_LOG";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external read_contacts: permission = "READ_CONTACTS";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external read_external_storage: permission = "READ_EXTERNAL_STORAGE";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external read_phone_numbers: permission = "READ_PHONE_NUMBERS";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external read_phone_state: permission = "READ_PHONE_STATE";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external read_sms: permission = "READ_SMS";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external receive_mms: permission = "RECEIVE_MMS";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external receive_sms: permission = "RECEIVE_SMS";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external receive_wap_push: permission = "RECEIVE_WAP_PUSH";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external record_audio: permission = "RECORD_AUDIO";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external send_sms: permission = "SEND_SMS";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external use_sip: permission = "USE_SIP";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external write_calendar: permission = "WRITE_CALENDAR";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external write_call_log: permission = "WRITE_CALL_LOG";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external write_contacts: permission = "WRITE_CONTACTS";
+  [@bs.module "react-native-permissions"]
+  [@bs.scope ("PERMISSIONS", "ANDROID")]
+  external write_external_storage: permission = "WRITE_EXTERNAL_STORAGE";
+};
+
+module Ios = {
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external bluetooth_peripheral: permission = "BLUETOOTH_PERIPHERAL";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external calendars: permission = "CALENDARS";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external camera: permission = "CAMERA";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external contacts: permission = "CONTACTS";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external face_id: permission = "FACE_ID";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external location_always: permission = "LOCATION_ALWAYS";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external location_when_in_use: permission = "LOCATION_WHEN_IN_USE";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external media_library: permission = "MEDIA_LIBRARY";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external microphone: permission = "MICROPHONE";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external motion: permission = "MOTION";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external photo_library: permission = "PHOTO_LIBRARY";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external reminders: permission = "REMINDERS";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external siri: permission = "SIRI";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external speech_recognition: permission = "SPEECH_RECOGNITION";
+  [@bs.module "react-native-permissions"] [@bs.scope ("PERMISSIONS", "IOS")]
+  external storekit: permission = "STOREKIT";
 };
+
+type permissionStatus;
+
+/* This feature is not available (on this device / in this context) */
+[@bs.module "react-native-permissions"] [@bs.scope "RESULTS"]
+external unavailable: permissionStatus = "UNAVAILABLE";
+
+/* The permission has not been requested / is denied but requestable */
+[@bs.module "react-native-permissions"] [@bs.scope "RESULTS"]
+external denied: permissionStatus = "DENIED";
+
+/* The permission is granted */
+[@bs.module "react-native-permissions"] [@bs.scope "RESULTS"]
+external granted: permissionStatus = "GRANTED";
+
+/* The permission is denied and not requestable anymore */
+[@bs.module "react-native-permissions"] [@bs.scope "RESULTS"]
+external blocked: permissionStatus = "BLOCKED";
+
+// methods
+
+[@bs.module "react-native-permissions"]
+external check: permission => Js.Promise.t(permissionStatus) = "check";
+
+type requestRationale = {
+  title: string,
+  message: string,
+  buttonPositive: option(string),
+  buttonNegative: option(string),
+  buttonNeutral: option(string),
+};
+
+[@bs.module "react-native-permissions"]
+external request: permission => Js.Promise.t(permissionStatus) = "request";
+
+[@bs.module "react-native-permissions"]
+external requestWithRational:
+  (permission, requestRationale) => Js.Promise.t(permissionStatus) =
+  "request";
+
+type notificationSettings = {
+  // properties only availables on iOS
+  // unavailable settings will not be included in the response object
+  alert: option(bool),
+  badge: option(bool),
+  sound: option(bool),
+  lockScreen: option(bool),
+  carPlay: option(bool),
+  notificationCenter: option(bool),
+  criticalAlert: option(bool),
+};
+
+type requestNotificationsResult = {
+  status: permissionStatus,
+  settings: notificationSettings,
+};
+
+[@bs.module "react-native-permissions"]
+external checkNotifications: unit => Js.Promise.t(requestNotificationsResult) =
+  "checkNotifications";
+
+// only used on iOS
+// string can be
+// "alert"
+// "badge"
+// "sound"
+// "criticalAlert"
+// "carPlay"
+// "provisional"
+[@bs.module "react-native-permissions"]
+external requestNotifications:
+  array(string) => Js.Promise.t(requestNotificationsResult) =
+  "requestNotifications";
+
+[@bs.module "react-native-permissions"]
+external openSettings: unit => Js.Promise.t(unit) = "openSettings";