diff --git a/blotztask-mobile/src/feature/settings/components/delete-reason-picker.tsx b/blotztask-mobile/src/feature/settings/components/delete-reason-picker.tsx
new file mode 100644
index 000000000..9400c44ee
--- /dev/null
+++ b/blotztask-mobile/src/feature/settings/components/delete-reason-picker.tsx
@@ -0,0 +1,78 @@
+import { Pressable, Text, TextInput, View } from "react-native";
+import { useState } from "react";
+import { useTranslation } from "react-i18next";
+import type { DeleteAccountReason } from "@/shared/constants/posthog-events";
+
+export type PickableReason = Exclude<DeleteAccountReason, "skipped">;
+
+const REASONS: Exclude<PickableReason, "other">[] = [
+  "no_longer_needed",
+  "too_complicated",
+  "missing_feature",
+  "ai_not_good",
+  "privacy_concern",
+  "switched_app",
+];
+
+/** Random order so the first option isn't over-picked; "other" always stays last. */
+function shuffledReasons(): PickableReason[] {
+  const order = [...REASONS];
+  for (let i = order.length - 1; i > 0; i--) {
+    const j = Math.floor(Math.random() * (i + 1));
+    [order[i], order[j]] = [order[j], order[i]];
+  }
+  return [...order, "other"];
+}
+
+export const DELETE_REASON_OTHER_MAX_LENGTH = 200;
+
+type Props = {
+  reason: PickableReason | null;
+  otherText: string;
+  onReasonChange: (reason: PickableReason | null) => void;
+  onOtherTextChange: (text: string) => void;
+};
+
+/**
+ * Optional "main reason for deleting" question in the delete-account modal.
+ * Answering is never required, and tapping the chosen reason again clears it.
+ */
+export function DeleteReasonPicker({ reason, otherText, onReasonChange, onOtherTextChange }: Props) {
+  const { t } = useTranslation("settings");
+  // Shuffled once per mount, so the order doesn't jump while the user is choosing.
+  const [reasons] = useState(shuffledReasons);
+
+  return (
+    <View className="mt-4">
+      <Text className="text-sm font-baloo text-secondary">{t("account.deleteReasonTitle")}</Text>
+      <View className="flex-row flex-wrap mt-2">
+        {reasons.map((key) => {
+          const selected = reason === key;
+          return (
+            <Pressable
+              key={key}
+              onPress={() => onReasonChange(selected ? null : key)}
+              className={`mr-2 mb-2 px-3 py-1 rounded-full border ${
+                selected ? "bg-secondary border-secondary" : "border-gray-300"
+              }`}
+            >
+              <Text className={`text-xs font-baloo ${selected ? "text-white" : "text-secondary"}`}>
+                {t(`account.deleteReasons.${key}`)}
+              </Text>
+            </Pressable>
+          );
+        })}
+      </View>
+      {reason === "other" ? (
+        <TextInput
+          value={otherText}
+          onChangeText={onOtherTextChange}
+          maxLength={DELETE_REASON_OTHER_MAX_LENGTH}
+          placeholder={t("account.deleteReasonOtherPlaceholder")}
+          multiline
+          className="mt-1 border border-gray-300 rounded-xl px-3 py-2 text-sm font-baloo text-secondary max-h-24"
+        />
+      ) : null}
+    </View>
+  );
+}
diff --git a/blotztask-mobile/src/feature/settings/screens/settings-account-screen.tsx b/blotztask-mobile/src/feature/settings/screens/settings-account-screen.tsx
index bb4e551f4..20f69d30a 100644
--- a/blotztask-mobile/src/feature/settings/screens/settings-account-screen.tsx
+++ b/blotztask-mobile/src/feature/settings/screens/settings-account-screen.tsx
@@ -8,9 +8,14 @@ import { FormDivider } from "@/shared/components/form-divider";
 import { useUserProfile } from "@/shared/hooks/useUserProfile";
 import LoadingScreen from "@/shared/components/loading-screen";
 import { useLogout } from "@/shared/hooks/useLogout";
+import { analytics } from "@/shared/services/analytics";
 import { useTranslation } from "react-i18next";
 import Modal from "react-native-modal";
 import { useDeleteUserMutation } from "@/feature/settings/hooks/useDeleteUserMutation";
+import {
+  DeleteReasonPicker,
+  type PickableReason,
+} from "@/feature/settings/components/delete-reason-picker";
 
 export default function SettingsAccountScreen() {
   const logout = useLogout();
@@ -20,6 +25,8 @@ export default function SettingsAccountScreen() {
   const { userProfile, isUserProfileLoading } = useUserProfile();
   const [isDeleteModalVisible, setIsDeleteModalVisible] = useState(false);
   const [deleteConfirmChecked, setDeleteConfirmChecked] = useState(false);
+  const [deleteReason, setDeleteReason] = useState<PickableReason | null>(null);
+  const [deleteReasonOtherText, setDeleteReasonOtherText] = useState("");
 
   const displayName =
     userProfile?.displayName && userProfile.displayName.length > 20
@@ -32,12 +39,25 @@ export default function SettingsAccountScreen() {
       : (userProfile?.email ?? "");
 
   const handleConfirmDelete = async () => {
+    // Queued before the delete request so it leaves while the user is still identified:
+    // logout resets PostHog right after. Analytics must never block the deletion.
+    try {
+      analytics.trackAccountDeleted({
+        reason: deleteReason ?? "skipped",
+        otherText: deleteReasonOtherText.trim(),
+      });
+      analytics.flush();
+    } catch {
+      // ignore — deleting the account matters more than the event
+    }
     await deleteUser();
     await logout();
   };
 
   const openDeleteModal = () => {
     setDeleteConfirmChecked(false);
+    setDeleteReason(null);
+    setDeleteReasonOtherText("");
     setIsDeleteModalVisible(true);
   };
 
@@ -123,6 +143,7 @@ export default function SettingsAccountScreen() {
         animationOut="fadeOut"
         useNativeDriver
         style={{ margin: 0 }}
+        avoidKeyboard
       >
         <View className="bg-white rounded-2xl p-6 mx-6">
           <Text className="text-xl font-baloo text-secondary">{t("account.deleteTitle")}</Text>
@@ -139,6 +160,13 @@ export default function SettingsAccountScreen() {
                 {t("account.deleteWarning")}
               </Text>
 
+              <DeleteReasonPicker
+                reason={deleteReason}
+                otherText={deleteReasonOtherText}
+                onReasonChange={setDeleteReason}
+                onOtherTextChange={setDeleteReasonOtherText}
+              />
+
               <Pressable
                 onPress={() => setDeleteConfirmChecked((prev) => !prev)}
                 className="flex-row items-center mt-4"
diff --git a/blotztask-mobile/src/i18n/locales/en/settings.json b/blotztask-mobile/src/i18n/locales/en/settings.json
index fd738aa5b..d81f88189 100644
--- a/blotztask-mobile/src/i18n/locales/en/settings.json
+++ b/blotztask-mobile/src/i18n/locales/en/settings.json
@@ -29,7 +29,18 @@
     "deleteWarning": "This permanently deletes your account and all data (tasks, notes, preferences). This can’t be undone.",
     "deleteConfirmText": "I understand this cannot be undone.",
     "deleteLoading": "Deleting your data...",
-    "deleteConfirm": "Delete permanently"
+    "deleteConfirm": "Delete permanently",
+    "deleteReasonTitle": "What’s the main reason you’re deleting your account?",
+    "deleteReasons": {
+      "no_longer_needed": "I no longer need this kind of app",
+      "too_complicated": "It's too complicated",
+      "missing_feature": "It's missing a feature I need",
+      "ai_not_good": "The AI results weren't good",
+      "privacy_concern": "I’m concerned about privacy or data security",
+      "switched_app": "I switched to another app",
+      "other": "Other"
+    },
+    "deleteReasonOtherPlaceholder": "Tell us more..."
   },
   "MembershipPlan": {
     "completedLabel": "Completed this month",
diff --git a/blotztask-mobile/src/i18n/locales/zh/settings.json b/blotztask-mobile/src/i18n/locales/zh/settings.json
index 75617ad8f..13f88e317 100644
--- a/blotztask-mobile/src/i18n/locales/zh/settings.json
+++ b/blotztask-mobile/src/i18n/locales/zh/settings.json
@@ -29,7 +29,18 @@
     "deleteWarning": "将永久删除你的账号及所有数据（任务、笔记、偏好设置）。此操作无法撤销。",
     "deleteConfirmText": "我已了解此操作无法撤销。",
     "deleteLoading": "正在删除你的数据...",
-    "deleteConfirm": "永久删除"
+    "deleteConfirm": "永久删除",
+    "deleteReasonTitle": "你注销账号的主要原因是？（单选）",
+    "deleteReasons": {
+      "no_longer_needed": "我不再需要这类 App",
+      "too_complicated": "用起来太复杂",
+      "missing_feature": "缺少我需要的功能",
+      "ai_not_good": "AI 的结果不够好",
+      "privacy_concern": "担心隐私或数据安全",
+      "switched_app": "我换用了别的 App",
+      "other": "其他"
+    },
+    "deleteReasonOtherPlaceholder": "多说一点..."
   },
   "MembershipPlan": {
     "completedLabel": "本月已完成",
diff --git a/blotztask-mobile/src/shared/constants/posthog-events.ts b/blotztask-mobile/src/shared/constants/posthog-events.ts
index d6237df73..cb0ecb80b 100644
--- a/blotztask-mobile/src/shared/constants/posthog-events.ts
+++ b/blotztask-mobile/src/shared/constants/posthog-events.ts
@@ -38,6 +38,7 @@ export const EVENTS = {
   ONBOARDING_VOICE_MIC_PRESSED: "onboarding_voice_mic_pressed",
   ONBOARDING_VOICE_TASK_GENERATED: "onboarding_voice_task_generated",
   ONBOARDING_VOICE_TASK_CREATED: "onboarding_voice_task_created",
+  ACCOUNT_DELETED: "account_deleted",
 } as const;
 
 export const SCREEN_NAMES = {
@@ -152,3 +153,18 @@ export type ShareContentType = "review" | "badge";
 export type OnboardingOutcome = "completed" | "skipped";
 
 export type OnboardingSection = "ai-voice" | "note" | "breakdown" | "invite";
+
+/**
+ * Why the user deleted their account, from the optional question in the delete modal.
+ * Fixed keys, not the shown text, so zh and en answers land in one bucket and the wording
+ * can change without splitting the chart. `skipped` = the user answered nothing.
+ */
+export type DeleteAccountReason =
+  | "no_longer_needed"
+  | "too_complicated"
+  | "missing_feature"
+  | "ai_not_good"
+  | "privacy_concern"
+  | "switched_app"
+  | "other"
+  | "skipped";
diff --git a/blotztask-mobile/src/shared/services/analytics.ts b/blotztask-mobile/src/shared/services/analytics.ts
index 6f7004059..9ea5af30a 100644
--- a/blotztask-mobile/src/shared/services/analytics.ts
+++ b/blotztask-mobile/src/shared/services/analytics.ts
@@ -22,6 +22,7 @@ import {
   type ShareContentType,
   type OnboardingOutcome,
   type OnboardingSection,
+  type DeleteAccountReason,
 } from "@/shared/constants/posthog-events";
 
 type ScreenName = (typeof SCREEN_NAMES)[keyof typeof SCREEN_NAMES];
@@ -191,6 +192,18 @@ export const analytics = {
     });
   },
 
+  /**
+   * Fires just before the delete request, so the event is queued while the user is still
+   * identified — logout resets PostHog right after. Pair with `flush()`.
+   * `otherText` is only sent for `other`, and is capped at 200 characters by the input.
+   */
+  trackAccountDeleted(params: { reason: DeleteAccountReason; otherText?: string }) {
+    posthog.capture(EVENTS.ACCOUNT_DELETED, {
+      reason: params.reason,
+      ...(params.reason === "other" && params.otherText ? { other_text: params.otherText } : {}),
+    });
+  },
+
   /** Fires when the user reaches the onboarding screen. */
   trackOnboardingStarted() {
     posthog.capture(EVENTS.ONBOARDING_STARTED);