diff --git a/apps/portal/src/components/TriggerButton.js b/apps/portal/src/components/TriggerButton.js
index c049e4a143b..b2cf7f21255 100644
--- a/apps/portal/src/components/TriggerButton.js
+++ b/apps/portal/src/components/TriggerButton.js
@@ -221,12 +221,17 @@ export default class TriggerButton extends React.Component {
     constructor(props) {
         super(props);
         this.state = {
-            width: null
+            width: null,
+            isMobile: window.innerWidth < 640
         };
         this.buttonRef = React.createRef();
+        this.handleResize = this.handleResize.bind(this);
     }
 
     componentDidMount() {
+        window.addEventListener('resize', this.handleResize);
+        this.handleResize();
+        
         setTimeout(() => {
             if (this.buttonRef.current) {
                 const iframeElement = this.buttonRef.current.node;
@@ -237,6 +242,16 @@ export default class TriggerButton extends React.Component {
         }, 0);
     }
 
+    componentWillUnmount() {
+        window.removeEventListener('resize', this.handleResize);
+    }
+
+    handleResize() {
+        this.setState({
+            isMobile: window.innerWidth < 640
+        });
+    }
+
     onWidthChange(width) {
         this.setState({width});
     }
@@ -265,6 +280,10 @@ export default class TriggerButton extends React.Component {
         const {portal_button: portalButton} = site;
         const {showPopup, scrollbarWidth} = this.context;
 
+        if (this.state.isMobile) {
+            return null;
+        }
+
         if (!portalButton || !isSigninAllowed({site}) || hasMode(['offerPreview'])) {
             return null;
         }
diff --git a/apps/portal/src/components/TriggerButton.test.js b/apps/portal/src/components/TriggerButton.test.js
index 141bad82648..e9cb46594d0 100644
--- a/apps/portal/src/components/TriggerButton.test.js
+++ b/apps/portal/src/components/TriggerButton.test.js
@@ -1,23 +1,68 @@
 import {render} from '../utils/test-utils';
 import TriggerButton from './TriggerButton';
 
-const setup = () => {
-    const {mockOnActionFn, ...utils} = render(
-        <TriggerButton />
+const setup = (customProps = {}) => {
+    const utils = render(
+        <TriggerButton {...customProps} />
     );
 
-    const triggerFrame = utils.getByTitle('portal-trigger');
     return {
-        mockOnActionFn,
-        triggerFrame,
+        triggerFrame: utils.queryByTitle('portal-trigger'),
+        rerender: utils.rerender,
         ...utils
     };
 };
 
 describe('Trigger Button', () => {
-    test('renders', () => {
-        const {triggerFrame} = setup();
+    let originalInnerWidth;
+
+    beforeEach(() => {
+        originalInnerWidth = window.innerWidth;
+        window.resizeTo = function (width) {
+            Object.defineProperty(window, 'innerWidth', {
+                configurable: true,
+                value: width
+            });
+            window.dispatchEvent(new Event('resize'));
+        };
+    });
+
+    afterEach(() => {
+        Object.defineProperty(window, 'innerWidth', {
+            configurable: true,
+            value: originalInnerWidth
+        });
+    });
 
+    test('renders when viewport is desktop size', () => {
+        window.resizeTo(1024);
+        const {triggerFrame} = setup();
         expect(triggerFrame).toBeInTheDocument();
     });
+
+    test('does not render when viewport is mobile size', () => {
+        window.resizeTo(375);
+        const {triggerFrame} = setup();
+        expect(triggerFrame).not.toBeInTheDocument();
+    });
+
+    test('removes itself when window is resized to mobile', () => {
+        window.resizeTo(1024);
+        const {rerender, queryByTitle} = setup();
+        expect(queryByTitle('portal-trigger')).toBeInTheDocument();
+
+        window.resizeTo(375);
+        rerender(<TriggerButton />);
+        expect(queryByTitle('portal-trigger')).not.toBeInTheDocument();
+    });
+
+    test('shows itself when window is resized to desktop', () => {
+        window.resizeTo(375);
+        const {rerender, queryByTitle} = setup();
+        expect(queryByTitle('portal-trigger')).not.toBeInTheDocument();
+
+        window.resizeTo(1024);
+        rerender(<TriggerButton />);
+        expect(queryByTitle('portal-trigger')).toBeInTheDocument();
+    });
 });
diff --git a/ghost/admin/mirage/fixtures/settings.js b/ghost/admin/mirage/fixtures/settings.js
index 30d2c311ee2..ce8fa3834da 100644
--- a/ghost/admin/mirage/fixtures/settings.js
+++ b/ghost/admin/mirage/fixtures/settings.js
@@ -75,7 +75,7 @@ export default [
 
     // PORTAL
     setting('portal', 'portal_name', true),
-    setting('portal', 'portal_button', true),
+    setting('portal', 'portal_button', false),
     setting('portal', 'portal_plans', JSON.stringify(['free'])),
     setting('portal', 'portal_default_plan', 'yearly'),
     setting('portal', 'portal_products', JSON.stringify([])),
diff --git a/ghost/core/core/server/data/schema/default-settings/default-settings.json b/ghost/core/core/server/data/schema/default-settings/default-settings.json
index dbced745dbb..2d036a745c2 100644
--- a/ghost/core/core/server/data/schema/default-settings/default-settings.json
+++ b/ghost/core/core/server/data/schema/default-settings/default-settings.json
@@ -327,7 +327,7 @@
             "type": "boolean"
         },
         "portal_button": {
-            "defaultValue": "true",
+            "defaultValue": "false",
             "validations": {
                 "isEmpty": false,
                 "isIn": [["true", "false"]]
diff --git a/ghost/core/test/unit/server/data/schema/integrity.test.js b/ghost/core/test/unit/server/data/schema/integrity.test.js
index 786b3562d96..c05139ed5de 100644
--- a/ghost/core/test/unit/server/data/schema/integrity.test.js
+++ b/ghost/core/test/unit/server/data/schema/integrity.test.js
@@ -37,7 +37,7 @@ describe('DB version integrity', function () {
     // Only these variables should need updating
     const currentSchemaHash = 'b26690fb57ffd0edbddb4cd9e02b17d6';
     const currentFixturesHash = '80e79d1efd5da275e19cb375afb4ad04';
-    const currentSettingsHash = '5bf829f7e4a6b831d4c5abb33744634d';
+    const currentSettingsHash = '80387fdbda0102ab4995660d5d98007c';
     const currentRoutesHash = '3d180d52c663d173a6be791ef411ed01';
 
     // If this test is failing, then it is likely a change has been made that requires a DB version bump,