diff --git a/frontend/src/api/files.ts b/frontend/src/api/files.ts
index 7337d9f31..f2dd08345 100644
--- a/frontend/src/api/files.ts
+++ b/frontend/src/api/files.ts
@@ -1,6 +1,7 @@
 import { useQuery } from '@tanstack/react-query'
 import { fetchWrapper, fetchWrapperBlob } from './fetchWrapper'
 import { API_BASE_URL } from '@/config'
+import { saveFile } from '@/lib/download'
 import type { FileInfo, ChunkedFileInfo, PatchOperation } from '@/types/files'
 
 interface FileApiUrlOptions {
@@ -59,15 +60,8 @@ export async function downloadDirectoryAsZip(path: string, options?: DownloadOpt
   })
   
   const blob = await fetchWrapperBlob(url)
-  const urlObj = window.URL.createObjectURL(blob)
-  const a = document.createElement('a')
-  a.href = urlObj
   const dirName = path.split('/').pop() || 'download'
-  a.download = `${dirName}.zip`
-  document.body.appendChild(a)
-  a.click()
-  document.body.removeChild(a)
-  window.URL.revokeObjectURL(urlObj)
+  await saveFile(blob, `${dirName}.zip`)
 }
 
 export async function applyFilePatches(path: string, patches: PatchOperation[]): Promise<{ success: boolean; totalLines: number }> {
diff --git a/frontend/src/api/repos.ts b/frontend/src/api/repos.ts
index 651a6d1c9..cc70aa32e 100644
--- a/frontend/src/api/repos.ts
+++ b/frontend/src/api/repos.ts
@@ -1,6 +1,7 @@
 import type { Repo } from './types'
 import { FetchError, fetchWrapper, fetchWrapperVoid, fetchWrapperBlob } from './fetchWrapper'
 import { API_BASE_URL } from '@/config'
+import { saveFile } from '@/lib/download'
 import type { DiscoverReposResponse, AssistantModeStatus, AssistantModeInitRequest } from '@opencode-manager/shared/types'
 
 export interface CreateRepoOptions {
@@ -196,14 +197,7 @@ export async function downloadRepo(id: number, repoName: string, options?: Downl
   const url = `${API_BASE_URL}/api/repos/${id}/download${params.toString() ? '?' + params.toString() : ''}`
   
   const blob = await fetchWrapperBlob(url)
-  const urlObj = window.URL.createObjectURL(blob)
-  const a = document.createElement('a')
-  a.href = urlObj
-  a.download = `${repoName}.zip`
-  document.body.appendChild(a)
-  a.click()
-  document.body.removeChild(a)
-  window.URL.revokeObjectURL(urlObj)
+  await saveFile(blob, `${repoName}.zip`)
 }
 
 export async function updateRepoOrder(order: number[]): Promise<void> {
diff --git a/frontend/src/components/file-browser/FilePreview.tsx b/frontend/src/components/file-browser/FilePreview.tsx
index 9f8dfcb33..55617c23a 100644
--- a/frontend/src/components/file-browser/FilePreview.tsx
+++ b/frontend/src/components/file-browser/FilePreview.tsx
@@ -3,6 +3,7 @@ import { Button } from '@/components/ui/button'
 import { Download, X, Edit3, Save, X as XIcon, WrapText, Eye, Code } from 'lucide-react'
 import type { FileInfo } from '@/types/files'
 import { getFileApiUrl } from '@/api/files'
+import { saveFileFromUrl } from '@/lib/download'
 import { VirtualizedTextView, type VirtualizedTextViewHandle } from '@/components/ui/virtualized-text-view'
 import { MarkdownRenderer } from './MarkdownRenderer'
 
@@ -94,12 +95,7 @@ export const FilePreview = memo(function FilePreview({ file, hideHeader = false,
   }
 
   const handleDownload = () => {
-    const link = document.createElement('a')
-    link.href = getFileApiUrl(file.path, { params: { download: true } })
-    link.download = file.name
-    document.body.appendChild(link)
-    link.click()
-    document.body.removeChild(link)
+    void saveFileFromUrl(getFileApiUrl(file.path, { params: { download: true } }), file.name)
   }
 
   const decodeBase64 = (base64: string): string => {
diff --git a/frontend/src/components/file-browser/FileTree.tsx b/frontend/src/components/file-browser/FileTree.tsx
index 8d6017519..f32b5342d 100644
--- a/frontend/src/components/file-browser/FileTree.tsx
+++ b/frontend/src/components/file-browser/FileTree.tsx
@@ -4,6 +4,7 @@ import { Button } from '@/components/ui/button'
 import { Input } from '@/components/ui/input'
 import { DeleteDialog } from '@/components/ui/delete-dialog'
 import { getFileApiUrl } from '@/api/files'
+import { saveFileFromUrl } from '@/lib/download'
 import { 
   File, 
   Folder, 
@@ -95,13 +96,7 @@ function TreeNode({ file, level, onFileSelect, onDirectoryClick, selectedFile, o
   const handleDownload = () => {
     if (file.isDirectory) return
 
-    const downloadUrl = getFileApiUrl(file.path, { params: { download: true } })
-    const link = document.createElement('a')
-    link.href = downloadUrl
-    link.download = file.name
-    document.body.appendChild(link)
-    link.click()
-    document.body.removeChild(link)
+    void saveFileFromUrl(getFileApiUrl(file.path, { params: { download: true } }), file.name)
   }
 
   const getFileIcon = () => {
diff --git a/frontend/src/components/settings/OpenCodeConfigManager.tsx b/frontend/src/components/settings/OpenCodeConfigManager.tsx
index 87dbc0a12..63177ff7e 100644
--- a/frontend/src/components/settings/OpenCodeConfigManager.tsx
+++ b/frontend/src/components/settings/OpenCodeConfigManager.tsx
@@ -24,6 +24,7 @@ import { useServerHealth } from '@/hooks/useServerHealth'
 import { useOpenCodeServerActions } from '@/hooks/useOpenCodeServerActions'
 import { parseJsonc, hasJsoncComments } from '@/lib/jsonc'
 import { showToast } from '@/lib/toast'
+import { saveFile } from '@/lib/download'
 import { invalidateConfigCaches } from '@/lib/queryInvalidation'
 import { getOpenCodeApiErrorMessage } from '@/lib/opencode-errors'
 import { FetchError } from '@/api/fetchWrapper'
@@ -308,12 +309,7 @@ export function OpenCodeConfigManager() {
     const content = config.rawContent || JSON.stringify(config.content, null, 2)
     const extension = config.rawContent && hasJsoncComments(config.rawContent) ? 'jsonc' : 'json'
     const blob = new Blob([content], { type: 'application/json' })
-    const url = URL.createObjectURL(blob)
-    const a = document.createElement('a')
-    a.href = url
-    a.download = `${config.name}.${extension}`
-    a.click()
-    URL.revokeObjectURL(url)
+    void saveFile(blob, `${config.name}.${extension}`)
   }
 
   
diff --git a/frontend/src/lib/download.test.ts b/frontend/src/lib/download.test.ts
new file mode 100644
index 000000000..fcf014e5b
--- /dev/null
+++ b/frontend/src/lib/download.test.ts
@@ -0,0 +1,113 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
+import { saveFile, saveFileFromUrl } from './download'
+import { fetchWrapperBlob } from '@/api/fetchWrapper'
+import { showToast } from './toast'
+
+vi.mock('./toast', () => ({
+  showToast: {
+    error: vi.fn(),
+    info: vi.fn(),
+  },
+}))
+
+vi.mock('@/api/fetchWrapper', () => ({
+  fetchWrapperBlob: vi.fn(),
+}))
+
+function setIosHomeScreenApp(): void {
+  Object.defineProperty(navigator, 'userAgent', { value: 'iPhone', configurable: true })
+  Object.defineProperty(navigator, 'standalone', { value: true, configurable: true })
+}
+
+describe('saveFile', () => {
+  let clickSpy: ReturnType<typeof vi.spyOn>
+
+  beforeEach(() => {
+    vi.clearAllMocks()
+    clickSpy = vi.spyOn(HTMLAnchorElement.prototype, 'click').mockImplementation(() => {})
+    vi.stubGlobal('URL', Object.assign(URL, {
+      createObjectURL: vi.fn(() => 'blob:mock'),
+      revokeObjectURL: vi.fn(),
+    }))
+  })
+
+  afterEach(() => {
+    vi.restoreAllMocks()
+    vi.unstubAllGlobals()
+    Reflect.deleteProperty(navigator, 'standalone')
+    Reflect.deleteProperty(navigator, 'canShare')
+    Reflect.deleteProperty(navigator, 'share')
+  })
+
+  it('downloads via an anchor outside iOS home screen apps', async () => {
+    const saved = await saveFile(new Blob(['x'], { type: 'text/markdown' }), 'notes.md')
+
+    expect(saved).toBe(true)
+    expect(clickSpy).toHaveBeenCalledTimes(1)
+  })
+
+  it('uses the share sheet instead of navigating in an iOS home screen app', async () => {
+    setIosHomeScreenApp()
+    const share = vi.fn().mockResolvedValue(undefined)
+    Object.defineProperty(navigator, 'canShare', { value: () => true, configurable: true })
+    Object.defineProperty(navigator, 'share', { value: share, configurable: true })
+
+    const saved = await saveFile(new Blob(['x'], { type: 'text/markdown' }), 'notes.md')
+
+    expect(saved).toBe(true)
+    expect(clickSpy).not.toHaveBeenCalled()
+    const shared = share.mock.calls[0][0].files[0] as File
+    expect(shared.name).toBe('notes.md')
+  })
+
+  it('reports a cancelled share as unsaved', async () => {
+    setIosHomeScreenApp()
+    const share = vi.fn().mockRejectedValue(new DOMException('cancelled', 'AbortError'))
+    Object.defineProperty(navigator, 'canShare', { value: () => true, configurable: true })
+    Object.defineProperty(navigator, 'share', { value: share, configurable: true })
+
+    const saved = await saveFile(new Blob(['x'], { type: 'text/markdown' }), 'notes.md')
+
+    expect(saved).toBe(false)
+    expect(clickSpy).not.toHaveBeenCalled()
+  })
+
+  it('offers a retry when the share loses user activation', async () => {
+    setIosHomeScreenApp()
+    const share = vi.fn()
+      .mockRejectedValueOnce(new DOMException('no activation', 'NotAllowedError'))
+      .mockResolvedValueOnce(undefined)
+    Object.defineProperty(navigator, 'canShare', { value: () => true, configurable: true })
+    Object.defineProperty(navigator, 'share', { value: share, configurable: true })
+
+    const saved = await saveFile(new Blob(['x'], { type: 'text/markdown' }), 'notes.md')
+
+    expect(saved).toBe(false)
+    const options = vi.mocked(showToast.info).mock.calls[0][1]
+    options?.action?.onClick()
+    await vi.waitFor(() => expect(share).toHaveBeenCalledTimes(2))
+    expect(clickSpy).not.toHaveBeenCalled()
+  })
+})
+
+describe('saveFileFromUrl', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    vi.spyOn(HTMLAnchorElement.prototype, 'click').mockImplementation(() => {})
+  })
+
+  afterEach(() => {
+    vi.restoreAllMocks()
+    Reflect.deleteProperty(navigator, 'standalone')
+  })
+
+  it('reports a fetch failure and returns false in an iOS home screen app', async () => {
+    setIosHomeScreenApp()
+    vi.mocked(fetchWrapperBlob).mockRejectedValueOnce(new Error('network'))
+
+    const saved = await saveFileFromUrl('/api/files/notes.md', 'notes.md')
+
+    expect(saved).toBe(false)
+    expect(showToast.error).toHaveBeenCalledWith('Failed to save notes.md')
+  })
+})
diff --git a/frontend/src/lib/download.ts b/frontend/src/lib/download.ts
new file mode 100644
index 000000000..16025dd9d
--- /dev/null
+++ b/frontend/src/lib/download.ts
@@ -0,0 +1,73 @@
+import { fetchWrapperBlob } from '@/api/fetchWrapper'
+import { showToast } from './toast'
+
+function isIosHomeScreenApp(): boolean {
+  const isIos =
+    /iPad|iPhone|iPod/.test(navigator.userAgent) ||
+    (navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1)
+  if (!isIos) return false
+
+  const isStandalone =
+    (navigator as Navigator & { standalone?: boolean }).standalone === true ||
+    window.matchMedia('(display-mode: standalone)').matches
+  return isStandalone
+}
+
+function saveViaAnchor(href: string, filename: string): void {
+  const link = document.createElement('a')
+  link.href = href
+  link.download = filename
+  document.body.appendChild(link)
+  link.click()
+  document.body.removeChild(link)
+}
+
+async function saveViaShareSheet(blob: Blob, filename: string): Promise<boolean> {
+  const file = new File([blob], filename, { type: blob.type || 'application/octet-stream' })
+
+  if (!navigator.canShare?.({ files: [file] })) {
+    showToast.error(`${filename} cannot be saved from this device`)
+    return false
+  }
+
+  try {
+    await navigator.share({ files: [file] })
+    return true
+  } catch (error) {
+    const name = error instanceof DOMException ? error.name : ''
+    if (name === 'AbortError') return false
+    if (name === 'NotAllowedError') {
+      showToast.info(`Tap Save to finish saving ${filename}`, {
+        action: { label: 'Save', onClick: () => void saveViaShareSheet(blob, filename) },
+      })
+      return false
+    }
+    showToast.error(`Failed to save ${filename}`)
+    return false
+  }
+}
+
+export async function saveFile(blob: Blob, filename: string): Promise<boolean> {
+  if (isIosHomeScreenApp()) {
+    return saveViaShareSheet(blob, filename)
+  }
+
+  const url = URL.createObjectURL(blob)
+  saveViaAnchor(url, filename)
+  setTimeout(() => URL.revokeObjectURL(url), 0)
+  return true
+}
+
+export async function saveFileFromUrl(url: string, filename: string): Promise<boolean> {
+  if (isIosHomeScreenApp()) {
+    try {
+      return await saveFile(await fetchWrapperBlob(url), filename)
+    } catch {
+      showToast.error(`Failed to save ${filename}`)
+      return false
+    }
+  }
+
+  saveViaAnchor(url, filename)
+  return true
+}
diff --git a/frontend/src/lib/exportSession.ts b/frontend/src/lib/exportSession.ts
index 949ae1c3a..17cd60893 100644
--- a/frontend/src/lib/exportSession.ts
+++ b/frontend/src/lib/exportSession.ts
@@ -1,4 +1,5 @@
 import type { MessageWithParts, Session, Part } from '@/api/types'
+import { saveFile } from './download'
 
 function formatDate(timestamp: number): string {
   return new Date(timestamp).toLocaleString()
@@ -115,16 +116,8 @@ function generateSessionMarkdown(
   return lines.join('\n')
 }
 
-export function downloadMarkdown(content: string, filename: string): void {
-  const blob = new Blob([content], { type: 'text/markdown' })
-  const url = URL.createObjectURL(blob)
-  const link = document.createElement('a')
-  link.href = url
-  link.download = filename
-  document.body.appendChild(link)
-  link.click()
-  document.body.removeChild(link)
-  URL.revokeObjectURL(url)
+export async function downloadMarkdown(content: string, filename: string): Promise<boolean> {
+  return saveFile(new Blob([content], { type: 'text/markdown' }), filename)
 }
 
 export function exportSession(
diff --git a/frontend/src/pages/SessionDetail.tsx b/frontend/src/pages/SessionDetail.tsx
index 1d832801e..cf2f78dc2 100644
--- a/frontend/src/pages/SessionDetail.tsx
+++ b/frontend/src/pages/SessionDetail.tsx
@@ -412,7 +412,7 @@ export function SessionDetail() {
     return newValue
   }, [preferences?.expandToolCalls, updateSettings]);
 
-  const handleExportSession = useCallback(() => {
+  const handleExportSession = useCallback(async () => {
     const data = getMessagesWithParts()
     if (!data || !session) {
       showToast.error('No session data to export')
@@ -420,8 +420,9 @@ export function SessionDetail() {
     }
     
     const { filename, content } = exportSession(data, session)
-    downloadMarkdown(content, filename)
-    showToast.success(`Exported to ${filename}`)
+    if (await downloadMarkdown(content, filename)) {
+      showToast.success(`Exported to ${filename}`)
+    }
   }, [getMessagesWithParts, session]);
 
   const handleUndoMessage = useCallback((restoredPrompt: string) => {