diff --git a/frontend/src/components/mail/RightPanel.tsx b/frontend/src/components/mail/RightPanel.tsx
index 8388208..ab530c7 100644
--- a/frontend/src/components/mail/RightPanel.tsx
+++ b/frontend/src/components/mail/RightPanel.tsx
@@ -65,11 +65,15 @@ export function RightPanel({
   onTab,
   onClose,
   thread,
+  single = false,
 }: {
   tab: PanelTab;
   onTab: (t: PanelTab) => void;
   onClose: () => void;
   thread: ThreadDetail | undefined;
+  /** Opened as Calendar or Contacts on its own (the phone's menu): a title
+   *  instead of the tabs, and Contacts starts on all contacts. */
+  single?: boolean;
 }) {
   const t = useT();
   // "Invite all to new event" (People tab) opens the SHARED calendar event form in
@@ -84,7 +88,12 @@ export function RightPanel({
   return (
     <aside className="flex h-full min-h-0 flex-col bg-app-surface">
       <div className="flex h-[52px] shrink-0 items-center gap-4 border-b border-app-border px-4">
-        {TABS.map(([id, label]) => (
+        {single && (
+          <h2 className="text-[17px] font-semibold">
+            {tab === "people" ? t("panel.contacts") : t("panel.calendar")}
+          </h2>
+        )}
+        {!single && TABS.map(([id, label]) => (
           <button
             key={id}
             onClick={() => onTab(id)}
@@ -105,7 +114,15 @@ export function RightPanel({
       </div>
       {tab !== "calendar" && (
         <div className="min-h-0 flex-1 overflow-y-auto">
-          {tab === "people" && <PeopleTab thread={thread} onInviteAll={inviteAll} />}
+          {tab === "people" && (
+            <PeopleTab
+              // A fresh list when switching between a conversation's people and Contacts.
+              key={single ? "contacts" : "conversation"}
+              thread={single ? undefined : thread}
+              initialSource={single || !thread ? "all" : "conversation"}
+              onInviteAll={inviteAll}
+            />
+          )}
           {tab === "attachments" && <AttachmentsTab thread={thread} />}
         </div>
       )}
@@ -171,10 +188,18 @@ function MenuItem({ checked, onClick, children }: { checked?: boolean; onClick:
 // People tab
 // ===========================================================================
 type PeopleSource = "conversation" | "all" | "recent" | "vip" | "autosaved";
-function PeopleTab({ thread, onInviteAll }: { thread: ThreadDetail | undefined; onInviteAll: (emails: string[]) => void }) {
+function PeopleTab({
+  thread,
+  onInviteAll,
+  initialSource = "conversation",
+}: {
+  thread: ThreadDetail | undefined;
+  onInviteAll: (emails: string[]) => void;
+  initialSource?: PeopleSource;
+}) {
   const t = useT();
   const navigate = useNavigate();
-  const [source, setSource] = useState<PeopleSource>("conversation");
+  const [source, setSource] = useState<PeopleSource>(initialSource);
   const [srcMenu, setSrcMenu] = useState(false);
   const [moreMenu, setMoreMenu] = useState(false);
   const [openEmail, setOpenEmail] = useState<string | null>(null);
@@ -237,7 +262,8 @@ function PeopleTab({ thread, onInviteAll }: { thread: ThreadDetail | undefined;
   );
 
   const SOURCES: [PeopleSource, string][] = [
-    ["conversation", t("panel.inConversation")],
+    // Only with a conversation to take people from (not as Contacts on its own).
+    ...(thread ? ([["conversation", t("panel.inConversation")]] as [PeopleSource, string][]) : []),
     ["all", t("panel.allContacts")],
     ["recent", t("panel.recent")],
     ["vip", t("panel.vips")],
diff --git a/frontend/src/i18n/en.ts b/frontend/src/i18n/en.ts
index 4a933c2..779b6c3 100644
--- a/frontend/src/i18n/en.ts
+++ b/frontend/src/i18n/en.ts
@@ -143,6 +143,7 @@ export const en = {
   "panel.toggle": "Toggle side panel",
   "panel.calendar": "Calendar",
   "panel.people": "People",
+  "panel.contacts": "Contacts",
   "panel.attachments": "Attachments",
   "panel.search": "Search",
   "panel.newEvent": "New event",
@@ -387,6 +388,31 @@ export const en = {
   "settings.secret": "Secret",
   "settings.confirm": "Confirm",
   "settings.sessions": "Active sessions",
+  "appPasswords.title": "App passwords",
+  "appPasswords.help":
+    "Calendar and contacts apps — your phone's, Thunderbird, macOS — sign in to Ultimo with an app password, never your account password. Give each app its own, so you can revoke one without affecting the others.",
+  "appPasswords.connectTitle": "Calendars and contacts in other apps",
+  "appPasswords.connectServer": "Server",
+  "appPasswords.connectUser": "User name",
+  "appPasswords.connectPassword": "Password",
+  "appPasswords.connectPasswordValue": "an app password (create one below)",
+  "appPasswords.connectHint":
+    "iPhone/iPad: Settings → Apps → Calendar (or Contacts) → Calendar Accounts → Add Account → Other → Add CalDAV (CardDAV) Account. Android: the DAVx⁵ app. Thunderbird: New Calendar → On the Network, and New Address Book → CardDAV.",
+  "appPasswords.new": "Create app password",
+  "appPasswords.name": "Name",
+  "appPasswords.namePlaceholder": "e.g. Thunderbird on my laptop",
+  "appPasswords.confirmPassword": "Your account password",
+  "appPasswords.create": "Create",
+  "appPasswords.madeFor": "App password for “{name}”:",
+  "appPasswords.copy": "Copy",
+  "appPasswords.copied": "Copied",
+  "appPasswords.onceOnly":
+    "Enter it in the app's password field, without spaces. You won't see it again — if you lose it, revoke it and create a new one.",
+  "appPasswords.done": "Done",
+  "appPasswords.created": "Created {date}",
+  "appPasswords.lastUsed": "last used {date}",
+  "appPasswords.neverUsed": "never used",
+  "appPasswords.confirmRevoke": "Revoke the app password “{name}”? The app using it will stop signing in.",
   "settings.thisDevice": "this device",
   "settings.revoke": "Revoke",
   "settings.threadOrder": "Conversation order",
diff --git a/frontend/src/routes/MailLayout.tsx b/frontend/src/routes/MailLayout.tsx
index 906a087..de1356b 100644
--- a/frontend/src/routes/MailLayout.tsx
+++ b/frontend/src/routes/MailLayout.tsx
@@ -50,6 +50,7 @@ import { useIsMobile } from "../lib/useIsMobile";
 import { useKeyboardShortcuts } from "../lib/useKeyboardShortcuts";
 import { subscribeWs } from "../lib/ws";
 import { PluginSlot } from "../plugins/PluginSlot";
+import { usePluginPages } from "../plugins/manifest";
 
 function quotaLabel(q: QuotaOut): string {
   const pct = q.quota_bytes > 0 ? (q.used_bytes / q.quota_bytes) * 100 : 0;
@@ -225,10 +226,21 @@ export function MailLayout() {
   // then kept so it can slide out again.
   const [sheetOpen, setSheetOpen] = useState(false);
   const [sheetUsed, setSheetUsed] = useState(false);
+  // Opened from the phone's menu as Calendar or Contacts on its own (no tabs).
+  const [sheetSingle, setSheetSingle] = useState(false);
   const openSheet = () => {
+    setSheetSingle(false);
     setSheetUsed(true);
     setSheetOpen(true);
   };
+  const openFromMenu = (tab: PanelTab) => {
+    setDrawerOpen(false);
+    setRightTab(tab);
+    setSheetSingle(true);
+    setSheetUsed(true);
+    setSheetOpen(true);
+  };
+  const pluginNames = new Set(usePluginPages().map((p) => p.plugin));
   useEffect(() => localStorage.setItem("mail.listOrder", listOrder), [listOrder]);
 
   const isDrafts = view === "folder:drafts";
@@ -1085,6 +1097,31 @@ export function MailLayout() {
         </nav>
         {mobile && (
           <div className="p-2 text-[15px]">
+            {/* Calendar and Contacts slide in from the right (the desktop's side panel). */}
+            {pluginNames.has("calendar") && (
+              <button
+                className="flex w-full items-center gap-2.5 rounded-lg px-3 py-2 text-left text-app-muted hover:bg-app-hover hover:text-app-fg"
+                onClick={() => openFromMenu("calendar")}
+              >
+                <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.7" strokeLinecap="round" strokeLinejoin="round" aria-hidden>
+                  <rect x="3.5" y="5" width="17" height="15.5" rx="2.5" />
+                  <path d="M3.5 10h17M8 3v4M16 3v4" />
+                </svg>
+                {t("panel.calendar")}
+              </button>
+            )}
+            {pluginNames.has("contacts") && (
+              <button
+                className="flex w-full items-center gap-2.5 rounded-lg px-3 py-2 text-left text-app-muted hover:bg-app-hover hover:text-app-fg"
+                onClick={() => openFromMenu("people")}
+              >
+                <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.7" strokeLinecap="round" strokeLinejoin="round" aria-hidden>
+                  <circle cx="12" cy="8.5" r="3.75" />
+                  <path d="M4.5 20c.8-3.7 3.9-5.75 7.5-5.75S18.7 16.3 19.5 20" />
+                </svg>
+                {t("panel.contacts")}
+              </button>
+            )}
             <InstallAppEntry onDone={() => setDrawerOpen(false)} />
           </div>
         )}
@@ -1670,7 +1707,13 @@ export function MailLayout() {
               sheetOpen ? "translate-x-0" : "pointer-events-none translate-x-full"
             }`}
           >
-            <RightPanel tab={rightTab} onTab={setRightTab} onClose={() => setSheetOpen(false)} thread={detailQuery.data} />
+            <RightPanel
+              tab={rightTab}
+              onTab={setRightTab}
+              onClose={() => setSheetOpen(false)}
+              thread={detailQuery.data}
+              single={sheetSingle}
+            />
           </div>
         </>
       )}