diff --git a/web/src/pwa/InstallHint.test.tsx b/web/src/pwa/InstallHint.test.tsx
index bb5b2c1..628ad96 100644
--- a/web/src/pwa/InstallHint.test.tsx
+++ b/web/src/pwa/InstallHint.test.tsx
@@ -9,6 +9,14 @@ const IPAD_SAFARI =
 const MAC_SAFARI = IPAD_SAFARI
 const IPHONE_CHROME =
   'Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/138.0.7204.119 Mobile/15E148 Safari/604.1'
+const IPHONE_FIREFOX =
+  'Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/141.0 Mobile/15E148 Safari/605.1.15'
+const IPHONE_EDGE =
+  'Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 EdgiOS/138.3351.83 Mobile/15E148 Safari/605.1.15'
+const IPHONE_OPERA =
+  'Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Mobile/15E148 Safari/604.1 OPT/5.4.0'
+const IPHONE_MQQBROWSER =
+  'Mozilla/5.0 (iPhone; CPU iPhone OS 14_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.3 MQQBrowser/11.3.5 Mobile/15E148 Safari/604.1'
 const ANDROID_CHROME =
   'Mozilla/5.0 (Linux; Android 15; Pixel 9) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Mobile Safari/537.36'
 const DESKTOP_CHROME =
@@ -76,6 +84,10 @@ describe('InstallHint', () => {
     ['desktop Chrome', { userAgent: DESKTOP_CHROME }],
     ['desktop Safari on a Mac', { userAgent: MAC_SAFARI }],
     ['Chrome on iPhone', { userAgent: IPHONE_CHROME, maxTouchPoints: 5 }],
+    ['Firefox on iPhone', { userAgent: IPHONE_FIREFOX, maxTouchPoints: 5 }],
+    ['Edge on iPhone', { userAgent: IPHONE_EDGE, maxTouchPoints: 5 }],
+    ['Opera on iPhone', { userAgent: IPHONE_OPERA, maxTouchPoints: 5 }],
+    ['MQQBrowser on iPhone', { userAgent: IPHONE_MQQBROWSER, maxTouchPoints: 5 }],
   ])('is hidden on %s', (_name, device: Device) => {
     mockDevice(device)
     render(<InstallHint />)
@@ -94,17 +106,41 @@ describe('InstallHint', () => {
     expect(screen.queryByRole('note')).toBeNull()
   })
 
-  it('shows and can be dismissed when storage is unavailable', () => {
+  it('stays up and reports the error when the dismissal cannot be saved', () => {
     mockDevice({ userAgent: IPHONE_SAFARI, maxTouchPoints: 5, navigatorStandalone: false })
-    const blocked = () => {
+    const setItem = vi.spyOn(Storage.prototype, 'setItem').mockImplementation(() => {
+      throw new DOMException('quota exceeded', 'QuotaExceededError')
+    })
+
+    render(<InstallHint />)
+    fireEvent.click(screen.getByRole('button', { name: 'Dismiss' }))
+    expect(screen.getByRole('note')).toHaveTextContent(copy)
+    expect(screen.getByRole('alert')).toHaveTextContent(
+      'Could not remember on this device that this hint was dismissed: QuotaExceededError: quota exceeded',
+    )
+
+    setItem.mockRestore()
+    fireEvent.click(screen.getByRole('button', { name: 'Retry' }))
+    expect(screen.queryByRole('note')).toBeNull()
+    expect(screen.queryByRole('alert')).toBeNull()
+    expect(localStorage.getItem(DISMISSED_KEY)).toBe('1')
+  })
+
+  it('shows and reports the error when storage cannot be read', () => {
+    mockDevice({ userAgent: IPHONE_SAFARI, maxTouchPoints: 5, navigatorStandalone: false })
+    const getItem = vi.spyOn(Storage.prototype, 'getItem').mockImplementation(() => {
       throw new DOMException('storage blocked', 'SecurityError')
-    }
-    vi.spyOn(Storage.prototype, 'getItem').mockImplementation(blocked)
-    vi.spyOn(Storage.prototype, 'setItem').mockImplementation(blocked)
+    })
 
     render(<InstallHint />)
     expect(screen.getByRole('note')).toHaveTextContent(copy)
-    fireEvent.click(screen.getByRole('button', { name: 'Dismiss' }))
-    expect(screen.queryByRole('note')).toBeNull()
+    expect(screen.getByRole('alert')).toHaveTextContent(
+      'Could not check whether this hint was dismissed on this device: SecurityError: storage blocked',
+    )
+
+    getItem.mockRestore()
+    fireEvent.click(screen.getByRole('button', { name: 'Retry' }))
+    expect(screen.getByRole('note')).toHaveTextContent(copy)
+    expect(screen.queryByRole('alert')).toBeNull()
   })
 })
diff --git a/web/src/pwa/InstallHint.tsx b/web/src/pwa/InstallHint.tsx
index f069f6a..92b30d2 100644
--- a/web/src/pwa/InstallHint.tsx
+++ b/web/src/pwa/InstallHint.tsx
@@ -1,6 +1,7 @@
 import { useState } from 'react'
 import { Share, X } from 'lucide-react'
 import { Card } from '../ui/Card.tsx'
+import { ErrorBanner } from '../ui/ErrorBanner.tsx'
 import { Icon } from '../ui/Icon.tsx'
 import { IconButton } from '../ui/IconButton.tsx'
 import styles from './InstallHint.module.css'
@@ -9,9 +10,11 @@ import styles from './InstallHint.module.css'
 // household dismissed the hint.
 export const DISMISSED_KEY = 'mealquest.installHint.dismissed'
 
-// iOS browsers other than Safari name themselves in the user agent; Safari
-// does not, and in-app web views leave out the Safari/ token.
-const OTHER_IOS_BROWSERS = /CriOS|FxiOS|EdgiOS|OPiOS|OPT\/|GSA\/|YaBrowser|DuckDuckGo|Brave/
+// Safari's user agent ends "(KHTML, like Gecko) Version/<v> Mobile/<build>
+// Safari/<v>" (iPadOS leaves out Mobile/). Every other iOS browser and in-app
+// web view adds its own token (CriOS, FxiOS, EdgiOS, OPiOS, MQQBrowser, GSA,
+// ...) or drops Version/ or Safari/, so only this exact tail is Safari.
+const SAFARI_TAIL = /\(KHTML, like Gecko\) Version\/[\d.]+ (?:Mobile\/\w+ )?Safari\/[\d.]+$/
 
 // isIosSafari reports whether the page is open in Safari on iPhone, iPod or
 // iPad. iPadOS 13+ asks for the desktop site and reports itself as a Mac, so
@@ -19,7 +22,7 @@ const OTHER_IOS_BROWSERS = /CriOS|FxiOS|EdgiOS|OPiOS|OPT\/|GSA\/|YaBrowser|DuckD
 export function isIosSafari(nav: Pick<Navigator, 'userAgent' | 'maxTouchPoints'>): boolean {
   const ua = nav.userAgent
   const ios = /iPhone|iPod|iPad/.test(ua) || (/Macintosh/.test(ua) && nav.maxTouchPoints > 1)
-  return ios && /Safari\//.test(ua) && !OTHER_IOS_BROWSERS.test(ua)
+  return ios && SAFARI_TAIL.test(ua)
 }
 
 // isStandalone reports whether the app is running from the Home Screen.
@@ -30,45 +33,65 @@ export function isStandalone(): boolean {
   return legacy === true || window.matchMedia('(display-mode: standalone)').matches
 }
 
+// HintState is whether the household dismissed the hint on this device, and
+// the storage failure, if any, that stopped us reading or saving that.
+type HintState = {
+  dismissed: boolean
+  failure: { action: 'read' | 'write'; message: string } | null
+}
+
 // Storage can be unavailable (blocked by the browser or privacy settings), in
-// which case reading it throws. The hint then counts as not dismissed.
-function readDismissed(): boolean {
+// which case using it throws. The failure is reported, never treated as a
+// remembered dismissal.
+function readDismissed(): HintState {
   try {
-    return window.localStorage.getItem(DISMISSED_KEY) === '1'
-  } catch {
-    return false
+    return { dismissed: window.localStorage.getItem(DISMISSED_KEY) === '1', failure: null }
+  } catch (err) {
+    return { dismissed: false, failure: { action: 'read', message: String(err) } }
   }
 }
 
-// Without storage the dismissal lasts until the page is reloaded.
-function writeDismissed() {
+function writeDismissed(): HintState {
   try {
     window.localStorage.setItem(DISMISSED_KEY, '1')
-  } catch {
-    // Nothing to remember it in; the component state still hides the hint.
+    return { dismissed: true, failure: null }
+  } catch (err) {
+    return { dismissed: false, failure: { action: 'write', message: String(err) } }
   }
 }
 
+const failureText = {
+  read: 'Could not check whether this hint was dismissed on this device',
+  write: 'Could not remember on this device that this hint was dismissed',
+}
+
 // InstallHint tells iOS and iPadOS Safari users how to install the app, which
 // iOS requires before it delivers Web Push. It shows only in a Safari browser
-// tab, never once installed, and stays dismissed on this device. Used by
-// onboarding step 3 and the Notifications screen.
+// tab, never once installed, and stays dismissed on this device. If storage
+// fails, the hint stays up with an error saying so. Used by onboarding step 3
+// and the Notifications screen.
 export function InstallHint() {
-  const [visible, setVisible] = useState(() => isIosSafari(navigator) && !isStandalone() && !readDismissed())
-  if (!visible) return null
-
-  function dismiss() {
-    writeDismissed()
-    setVisible(false)
-  }
+  const [eligible] = useState(() => isIosSafari(navigator) && !isStandalone())
+  const [state, setState] = useState<HintState>(() =>
+    eligible ? readDismissed() : { dismissed: false, failure: null },
+  )
+  if (!eligible || state.dismissed) return null
 
+  const { failure } = state
   return (
-    <Card tone="muted" role="note" className={styles.hint}>
-      <Icon icon={Share} className={styles.icon} />
-      <p className={styles.message}>Tap Share, then Add to Home Screen to get notifications</p>
-      <IconButton label="Dismiss" onClick={dismiss}>
-        <Icon icon={X} />
-      </IconButton>
-    </Card>
+    <>
+      <Card tone="muted" role="note" className={styles.hint}>
+        <Icon icon={Share} className={styles.icon} />
+        <p className={styles.message}>Tap Share, then Add to Home Screen to get notifications</p>
+        <IconButton label="Dismiss" onClick={() => setState(writeDismissed())}>
+          <Icon icon={X} />
+        </IconButton>
+      </Card>
+      {failure && (
+        <ErrorBanner onRetry={() => setState(failure.action === 'read' ? readDismissed() : writeDismissed())}>
+          {failureText[failure.action]}: {failure.message}
+        </ErrorBanner>
+      )}
+    </>
   )
 }