diff --git a/apps/common/mobile/lib/controller/collaboration/Collaboration.jsx b/apps/common/mobile/lib/controller/collaboration/Collaboration.jsx
index a1dbec1b2..a72809b9b 100644
--- a/apps/common/mobile/lib/controller/collaboration/Collaboration.jsx
+++ b/apps/common/mobile/lib/controller/collaboration/Collaboration.jsx
@@ -6,8 +6,7 @@ class CollaborationController extends Component {
     constructor(props){
         super(props);
 
-        Common.Notifications.on('configOptionsFill', () => {
-            const api = Common.EditorApi.get();
+        Common.Notifications.on('engineCreated', (api) => {
             api.asc_registerCallback('asc_onAuthParticipantsChanged', this.onChangeEditUsers.bind(this));
             api.asc_registerCallback('asc_onParticipantsChanged',     this.onChangeEditUsers.bind(this));
             api.asc_registerCallback('asc_onConnectionStateChanged',  this.onUserConnection.bind(this));
diff --git a/apps/common/mobile/lib/controller/collaboration/Comments.jsx b/apps/common/mobile/lib/controller/collaboration/Comments.jsx
index d7204f010..c0d087e62 100644
--- a/apps/common/mobile/lib/controller/collaboration/Comments.jsx
+++ b/apps/common/mobile/lib/controller/collaboration/Comments.jsx
@@ -238,6 +238,9 @@ class AddCommentController extends Component {
     }
     getUserInfo () {
         this.currentUser = this.props.users.currentUser;
+        if (!this.currentUser) {
+            this.currentUser = this.props.users.setCurrentUser(this.props.storeAppOptions.user.id);
+        }
         const name = this.currentUser.asc_getUserName();
         return {
             name: name,
diff --git a/apps/common/mobile/lib/store/users.js b/apps/common/mobile/lib/store/users.js
index 57a7f5a06..bf334c8e2 100644
--- a/apps/common/mobile/lib/store/users.js
+++ b/apps/common/mobile/lib/store/users.js
@@ -28,6 +28,7 @@ export class storeUsers {
                 this.currentUser = item;
             }
         });
+        return this.currentUser;
     }
 
     connection (change) {
diff --git a/apps/presentationeditor/mobile/locale/en.json b/apps/presentationeditor/mobile/locale/en.json
index 15ec8dca9..dc57ad180 100644
--- a/apps/presentationeditor/mobile/locale/en.json
+++ b/apps/presentationeditor/mobile/locale/en.json
@@ -267,6 +267,27 @@
       "textThemeColors": "Theme Colors",
       "textStandartColors": "Standard Colors",
       "textCustomColors": "Custom Colors"
+    },
+    "Collaboration": {
+      "textCollaboration": "Collaboration",
+      "textBack": "Back",
+      "textUsers": "Users",
+      "textEditUser": "Users who are editing the file:",
+      "textComments": "Comments",
+      "textAddComment": "Add Comment",
+      "textCancel": "Cancel",
+      "textDone": "Done",
+      "textNoComments": "This document doesn't contain comments",
+      "textEdit": "Edit",
+      "textResolve": "Resolve",
+      "textReopen": "Reopen",
+      "textAddReply": "Add Reply",
+      "textDeleteComment": "Delete Comment",
+      "textMessageDeleteComment": "Do you really want to delete this comment?",
+      "textMessageDeleteReply": "Do you really want to delete this reply?",
+      "textDeleteReply": "Delete Reply",
+      "textEditComment": "Edit Comment",
+      "textEditReply": "Edit Reply"
     }
   }
 }
\ No newline at end of file
diff --git a/apps/presentationeditor/mobile/src/controller/Main.jsx b/apps/presentationeditor/mobile/src/controller/Main.jsx
index d8ee673da..76f2f65ce 100644
--- a/apps/presentationeditor/mobile/src/controller/Main.jsx
+++ b/apps/presentationeditor/mobile/src/controller/Main.jsx
@@ -1,9 +1,15 @@
 
-import React, { Component } from 'react'
+import React, { Component, Fragment } from 'react'
 import { inject } from "mobx-react";
 import { f7 } from "framework7-react";
 import { withTranslation } from 'react-i18next';
-import CollaborationController from '../../../../common/mobile/lib/controller/collaboration/Collaboration.jsx'
+import CollaborationController from '../../../../common/mobile/lib/controller/collaboration/Collaboration.jsx';
+import {
+    CommentsController,
+    AddCommentController,
+    EditCommentController,
+    ViewCommentsController
+} from "../../../../common/mobile/lib/controller/collaboration/Comments";
 
 @inject("storeFocusObjects", "storeAppOptions", "storePresentationInfo", "storePresentationSettings", "storeSlideSettings", "storeTextSettings", "storeTableSettings", "storeChartSettings", "storeLinkSettings")
 class MainController extends Component {
@@ -346,7 +352,15 @@ class MainController extends Component {
     }
 
     render() {
-        return <CollaborationController />
+        return (
+            <Fragment>
+                <CollaborationController />
+                <CommentsController />
+                <AddCommentController />
+                <EditCommentController />
+                <ViewCommentsController />
+            </Fragment>
+            )
     }
 
     componentDidMount() {
diff --git a/apps/presentationeditor/mobile/src/controller/add/AddOther.jsx b/apps/presentationeditor/mobile/src/controller/add/AddOther.jsx
index e2838493e..4ac82cca4 100644
--- a/apps/presentationeditor/mobile/src/controller/add/AddOther.jsx
+++ b/apps/presentationeditor/mobile/src/controller/add/AddOther.jsx
@@ -88,10 +88,38 @@ class AddOtherController extends Component {
         });
     }
 
+    hideAddComment () {
+        const api = Common.EditorApi.get();
+        const stack = api.getSelectedElements();
+        let isText = false,
+            isChart = false;
+
+        stack.forEach((item) => {
+            const objectType = item.get_ObjectType();
+            if (objectType === Asc.c_oAscTypeSelectElement.Paragraph) {
+                isText = true;
+            } else if (objectType === Asc.c_oAscTypeSelectElement.Chart) {
+                isChart = true;
+            }
+        });
+        if (stack.length > 0) {
+            const topObject = stack[stack.length - 1];
+            const topObjectValue = topObject.get_ObjectValue();
+            let objectLocked = typeof topObjectValue.get_Locked === 'function' ? topObjectValue.get_Locked() : false;
+            !objectLocked && (objectLocked = typeof topObjectValue.get_LockDelete === 'function' ? topObjectValue.get_LockDelete() : false);
+            if (!objectLocked) {
+                return ((isText && isChart) || api.can_AddQuotedComment() === false);
+            }
+        }
+        return true;
+    }
+
     render () {
         return (
-            <AddOther onStyleClick={this.onStyleClick}
+            <AddOther closeModal={this.closeModal}
+                      onStyleClick={this.onStyleClick}
                       initStyleTable={this.initStyleTable}
+                      hideAddComment={this.hideAddComment}
             />
         )
     }
diff --git a/apps/presentationeditor/mobile/src/store/mainStore.js b/apps/presentationeditor/mobile/src/store/mainStore.js
index 4ed3fd33e..299a6a63b 100644
--- a/apps/presentationeditor/mobile/src/store/mainStore.js
+++ b/apps/presentationeditor/mobile/src/store/mainStore.js
@@ -16,6 +16,7 @@ import { storeLinkSettings } from "./linkSettings";
 // import {storeParagraphSettings} from "./paragraphSettings";
 // import {storeShapeSettings} from "./shapeSettings";
 // import {storeImageSettings} from "./imageSettings";
+import {storeComments} from "../../../../common/mobile/lib/store/comments";
 
 export const stores = {
     storeAppOptions: new storeAppOptions(),
@@ -31,10 +32,11 @@ export const stores = {
     storeShapeSettings: new storeShapeSettings(),
     storeTableSettings: new storeTableSettings(),
     storeChartSettings: new storeChartSettings(),
-    storeLinkSettings: new storeLinkSettings()
+    storeLinkSettings: new storeLinkSettings(),
     // storeTextSettings: new storeTextSettings(),
     // storeParagraphSettings: new storeParagraphSettings(),
     // storeShapeSettings: new storeShapeSettings(),
     // storeChartSettings: new storeChartSettings(),
+    storeComments: new storeComments()
 };
 
diff --git a/apps/presentationeditor/mobile/src/view/add/AddOther.jsx b/apps/presentationeditor/mobile/src/view/add/AddOther.jsx
index e80478b4a..572d77a39 100644
--- a/apps/presentationeditor/mobile/src/view/add/AddOther.jsx
+++ b/apps/presentationeditor/mobile/src/view/add/AddOther.jsx
@@ -33,6 +33,7 @@ const AddOther = props => {
     const { t } = useTranslation();
     const _t = t('View.Add', {returnObjects: true});
     const showInsertLink = props.storeLinkSettings.canAddLink && !props.storeFocusObjects.paragraphLocked;
+    const hideAddComment = props.hideAddComment();
     return (
         <List>
             <ListItem title={_t.textTable} link={'/add-table/'} routeProps={{
@@ -41,9 +42,12 @@ const AddOther = props => {
             }}>
                 <Icon slot="media" icon="icon-add-table"></Icon>
             </ListItem>
-            <ListItem title={_t.textComment}>
+            {!hideAddComment && <ListItem title={_t.textComment} onClick={() => {
+                props.closeModal();
+                Common.Notifications.trigger('addcomment');
+            }}>
                 <Icon slot="media" icon="icon-insert-comment"></Icon>
-            </ListItem>
+            </ListItem>}
             {showInsertLink &&
                 <ListItem title={_t.textLink} link={'/add-link/'}>
                     <Icon slot="media" icon="icon-link"></Icon>