diff --git a/components/nav/NavFooter.vue b/components/nav/NavFooter.vue
index 81ae1394..7a9a416e 100644
--- a/components/nav/NavFooter.vue
+++ b/components/nav/NavFooter.vue
@@ -22,9 +22,9 @@ function toggleDark() {
         <button
           flex
           text-lg
-          :class="isZenMode ? 'i-ri:layout-right-2-line' : 'i-ri:layout-right-line'"
+          :class="userSettings.zenMode ? 'i-ri:layout-right-2-line' : 'i-ri:layout-right-line'"
           :aria-label="$t('nav.zen_mode')"
-          @click="toggleZenMode()"
+          @click="userSettings.zenMode = !userSettings.zenMode"
         />
       </CommonTooltip>
     </div>
diff --git a/components/status/StatusActionsMore.vue b/components/status/StatusActionsMore.vue
index 4c0c3aa9..fe183b84 100644
--- a/components/status/StatusActionsMore.vue
+++ b/components/status/StatusActionsMore.vue
@@ -126,7 +126,7 @@ async function editStatus() {
 
     <template #popper>
       <div flex="~ col">
-        <template v-if="isZenMode">
+        <template v-if="userSettings.zenMode">
           <CommonDropdownItem
             :text="$t('action.reply')"
             icon="i-ri:chat-3-line"
diff --git a/components/status/StatusCard.vue b/components/status/StatusCard.vue
index c70dab69..8a364aa1 100644
--- a/components/status/StatusCard.vue
+++ b/components/status/StatusCard.vue
@@ -138,7 +138,7 @@ const isDM = $computed(() => status.visibility === 'direct')
             <StatusReplyingTo :collapsed="true" :status="status" :class="faded ? 'text-secondary-light' : ''" />
           </div>
           <div flex-auto />
-          <div v-if="!isZenMode" text-sm text-secondary flex="~ row nowrap" hover:underline>
+          <div v-if="!userSettings.zenMode" text-sm text-secondary flex="~ row nowrap" hover:underline>
             <AccountBotIndicator v-if="status.account.bot" me-2 />
             <div flex>
               <CommonTooltip :content="createdAt">
@@ -155,7 +155,7 @@ const isDM = $computed(() => status.visibility === 'direct')
         </div>
         <StatusContent :status="status" :context="context" mb2 :class="{ 'mt-2 mb1': isDM }" />
         <div>
-          <StatusActions v-if="(actions !== false && !isZenMode)" :status="status" />
+          <StatusActions v-if="(actions !== false && !userSettings.zenMode)" :status="status" />
         </div>
       </div>
     </div>
diff --git a/components/status/StatusPreviewCard.vue b/components/status/StatusPreviewCard.vue
index 58f4ba8d..f68425c3 100644
--- a/components/status/StatusPreviewCard.vue
+++ b/components/status/StatusPreviewCard.vue
@@ -21,7 +21,7 @@ const isSquare = $computed(() => (
 ))
 const providerName = $computed(() => props.card.providerName ? props.card.providerName : new URL(props.card.url).hostname)
 
-const gitHubCards = $(computedEager(() => useFeatureFlags().experimentalGitHubCards))
+const gitHubCards = $(useFeatureFlag('experimentalGitHubCards'))
 
 // TODO: handle card.type: 'photo' | 'video' | 'rich';
 const cardTypeIconMap: Record<CardType, string> = {
diff --git a/components/timeline/TimelinePaginator.vue b/components/timeline/TimelinePaginator.vue
index 89fe3035..23a0454c 100644
--- a/components/timeline/TimelinePaginator.vue
+++ b/components/timeline/TimelinePaginator.vue
@@ -12,7 +12,7 @@ const { paginator, stream } = defineProps<{
 }>()
 
 const { formatNumber } = useHumanReadableNumber()
-const virtualScroller = $(computedEager(() => useFeatureFlags().experimentalVirtualScroll))
+const virtualScroller = $(useFeatureFlag('experimentalVirtualScroll'))
 </script>
 
 <template>
diff --git a/composables/command.ts b/composables/command.ts
index 0b37f4f1..aa74e284 100644
--- a/composables/command.ts
+++ b/composables/command.ts
@@ -271,10 +271,10 @@ export const provideGlobalCommands = () => {
     scope: 'Preferences',
 
     name: () => t('command.toggle_zen_mode'),
-    icon: () => isZenMode.value ? 'i-ri:layout-right-2-line' : 'i-ri:layout-right-line',
+    icon: () => userSettings.value.zenMode ? 'i-ri:layout-right-2-line' : 'i-ri:layout-right-line',
 
     onActivate() {
-      toggleZenMode()
+      userSettings.value.zenMode = !userSettings.value.zenMode
     },
   })
 
diff --git a/composables/dialog.ts b/composables/dialog.ts
index db0dede0..b7d07a98 100644
--- a/composables/dialog.ts
+++ b/composables/dialog.ts
@@ -1,6 +1,6 @@
 import type { Attachment, Status, StatusEdit } from 'masto'
 import type { Draft } from '~/types'
-import { STORAGE_KEY_FIRST_VISIT, STORAGE_KEY_ZEN_MODE } from '~/constants'
+import { STORAGE_KEY_FIRST_VISIT } from '~/constants'
 
 export const mediaPreviewList = ref<Attachment[]>([])
 export const mediaPreviewIndex = ref(0)
@@ -11,7 +11,6 @@ export const dialogDraftKey = ref<string>()
 export const commandPanelInput = ref('')
 
 export const isFirstVisit = useLocalStorage(STORAGE_KEY_FIRST_VISIT, !process.mock)
-export const isZenMode = useLocalStorage(STORAGE_KEY_ZEN_MODE, false)
 
 export const isSigninDialogOpen = ref(false)
 export const isPublishDialogOpen = ref(false)
@@ -22,8 +21,6 @@ export const isCommandPanelOpen = ref(false)
 
 export const lastPublishDialogStatus = ref<Status | null>(null)
 
-export const toggleZenMode = useToggle(isZenMode)
-
 export function openSigninDialog() {
   isSigninDialogOpen.value = true
 }
diff --git a/composables/featureFlags.ts b/composables/featureFlags.ts
deleted file mode 100644
index d050f790..00000000
--- a/composables/featureFlags.ts
+++ /dev/null
@@ -1,38 +0,0 @@
-import { STORAGE_KEY_FEATURE_FLAGS } from '~/constants'
-
-export interface FeatureFlags {
-  experimentalVirtualScroll: boolean
-  experimentalGitHubCards: boolean
-  experimentalUserPicker: boolean
-}
-export type FeatureFlagsMap = Record<string, FeatureFlags>
-
-export function getDefaultFeatureFlags(): FeatureFlags {
-  return {
-    experimentalVirtualScroll: false,
-    experimentalGitHubCards: true,
-    experimentalUserPicker: true,
-  }
-}
-
-export const currentUserFeatureFlags = process.server
-  ? computed(getDefaultFeatureFlags)
-  : useUserLocalStorage(STORAGE_KEY_FEATURE_FLAGS, getDefaultFeatureFlags)
-
-export function useFeatureFlags() {
-  const featureFlags = currentUserFeatureFlags.value
-
-  return featureFlags
-}
-
-export function toggleFeatureFlag(key: keyof FeatureFlags) {
-  const featureFlags = currentUserFeatureFlags.value
-
-  if (featureFlags[key])
-    featureFlags[key] = !featureFlags[key]
-  else
-    featureFlags[key] = true
-}
-
-const userPicker = eagerComputed(() => useFeatureFlags().experimentalUserPicker)
-export const showUserPicker = computed(() => useUsers().value.length > 1 && userPicker.value)
diff --git a/composables/settings/featureFlags.ts b/composables/settings/featureFlags.ts
new file mode 100644
index 00000000..c43cd22d
--- /dev/null
+++ b/composables/settings/featureFlags.ts
@@ -0,0 +1,36 @@
+import type { Ref } from 'vue'
+import { userSettings } from '.'
+
+export interface FeatureFlags {
+  experimentalVirtualScroll: boolean
+  experimentalGitHubCards: boolean
+  experimentalUserPicker: boolean
+}
+export type FeatureFlagsMap = Record<string, FeatureFlags>
+
+const DEFAULT_FEATURE_FLAGS: FeatureFlags = {
+  experimentalVirtualScroll: false,
+  experimentalGitHubCards: true,
+  experimentalUserPicker: true,
+}
+
+export function useFeatureFlag<T extends keyof FeatureFlags>(name: T): Ref<FeatureFlags[T]> {
+  return computed({
+    get() {
+      return getFeatureFlag(name)
+    },
+    set(value) {
+      if (userSettings.value)
+        userSettings.value.featureFlags[name] = value
+    },
+  })
+}
+
+export function getFeatureFlag<T extends keyof FeatureFlags>(name: T): FeatureFlags[T] {
+  return userSettings.value?.featureFlags?.[name] ?? DEFAULT_FEATURE_FLAGS[name]
+}
+
+export function toggleFeatureFlag(key: keyof FeatureFlags) {
+  const flag = useFeatureFlag(key)
+  flag.value = !flag.value
+}
diff --git a/composables/settings/index.ts b/composables/settings/index.ts
new file mode 100644
index 00000000..c59283d3
--- /dev/null
+++ b/composables/settings/index.ts
@@ -0,0 +1,21 @@
+import type { FeatureFlags } from './featureFlags'
+import type { ColorMode, FontSize } from '~/types'
+import { STORAGE_KEY_SETTINGS } from '~/constants'
+
+export interface UserSettings {
+  featureFlags: Partial<FeatureFlags>
+  colorMode?: ColorMode
+  fontSize?: FontSize
+  lang?: string
+  zenMode?: boolean
+}
+
+export function getDefaultUserSettings(): UserSettings {
+  return {
+    featureFlags: {},
+  }
+}
+
+export const userSettings = process.server
+  ? computed(getDefaultUserSettings)
+  : useUserLocalStorage(STORAGE_KEY_SETTINGS, getDefaultUserSettings)
diff --git a/constants/index.ts b/constants/index.ts
index becf0d0d..7770ca1d 100644
--- a/constants/index.ts
+++ b/constants/index.ts
@@ -10,9 +10,7 @@ export const STORAGE_KEY_SERVERS = 'elk-servers'
 export const STORAGE_KEY_CURRENT_USER = 'elk-current-user'
 export const STORAGE_KEY_NOTIFY_TAB = 'elk-notify-tab'
 export const STORAGE_KEY_FIRST_VISIT = 'elk-first-visit'
-export const STORAGE_KEY_ZEN_MODE = 'elk-zenmode'
-export const STORAGE_KEY_LANG = 'elk-lang'
-export const STORAGE_KEY_FEATURE_FLAGS = 'elk-feature-flags'
+export const STORAGE_KEY_SETTINGS = 'elk-settings'
 export const STORAGE_KEY_CUSTOM_EMOJIS = 'elk-custom-emojis'
 export const STORAGE_KEY_HIDE_EXPLORE_POSTS_TIPS = 'elk-hide-explore-posts-tips'
 export const STORAGE_KEY_HIDE_EXPLORE_NEWS_TIPS = 'elk-hide-explore-news-tips'
@@ -24,6 +22,6 @@ export const COOKIE_MAX_AGE = 10 * 365 * 24 * 60 * 60 * 1000
 
 export const COOKIE_KEY_FONT_SIZE = 'elk-font-size'
 export const COOKIE_KEY_COLOR_MODE = 'elk-color-mode'
-export const COOKIE_KEY_LOCALE = 'elk-locale'
+export const COOKIE_KEY_LOCALE = 'elk-lang'
 
 export const HANDLED_MASTO_URLS = /^(https?:\/\/)?([\w\d-]+\.)+\w+\/(@[@\w\d-\.]+)(\/objects)?(\/\d+)?$/
diff --git a/layouts/default.vue b/layouts/default.vue
index d51552fa..2c09b010 100644
--- a/layouts/default.vue
+++ b/layouts/default.vue
@@ -1,11 +1,18 @@
 <script lang="ts" setup>
+import { useFeatureFlag } from '~~/composables/settings/featureFlags'
+
 const route = useRoute()
 
 const wideLayout = computed(() => route.meta.wideLayout ?? false)
+
+const showUserPicker = logicAnd(
+  useFeatureFlag('experimentalUserPicker'),
+  () => useUsers().value.length > 1,
+)
 </script>
 
 <template>
-  <div h-full :class="{ zen: isZenMode }">
+  <div h-full :class="{ zen: userSettings.zenMode }">
     <main flex w-full mxa lg:max-w-80rem>
       <aside class="hidden sm:flex w-1/8 md:w-1/6 lg:w-1/5 xl:w-1/4 justify-end xl:me-4 zen-hide" relative>
         <div sticky top-0 w-20 xl:w-100 h-screen flex="~ col" lt-xl-items-center>
diff --git a/nuxt.config.ts b/nuxt.config.ts
index 4b423a6e..bd17aebc 100644
--- a/nuxt.config.ts
+++ b/nuxt.config.ts
@@ -50,6 +50,7 @@ export default defineNuxtConfig({
     dirs: [
       './composables/push-notifications',
       './composables/tiptap',
+      './composables/settings',
     ],
   },
   vite: {
diff --git a/package.json b/package.json
index ac36f67f..4c6dea9a 100644
--- a/package.json
+++ b/package.json
@@ -87,6 +87,7 @@
     "@unocss/nuxt": "^0.48.0",
     "@vitejs/plugin-vue": "^3.2.0",
     "@vue-macros/nuxt": "^0.2.8",
+    "@vueuse/math": "^9.10.0",
     "@vueuse/nuxt": "^9.9.0",
     "bumpp": "^8.2.1",
     "emoji-mart": "^5.4.0",
diff --git a/pages/settings/preferences/index.vue b/pages/settings/preferences/index.vue
index f657a640..bf92fd37 100644
--- a/pages/settings/preferences/index.vue
+++ b/pages/settings/preferences/index.vue
@@ -18,19 +18,19 @@ useHeadFixed({
       {{ $t('settings.feature_flags.title') }}
     </h3>
     <SettingsToggleItem
-      :checked="currentUserFeatureFlags.experimentalVirtualScroll"
+      :checked="getFeatureFlag('experimentalVirtualScroll')"
       @click="toggleFeatureFlag('experimentalVirtualScroll')"
     >
       {{ $t('settings.feature_flags.virtual_scroll') }}
     </SettingsToggleItem>
     <SettingsToggleItem
-      :checked="currentUserFeatureFlags.experimentalGitHubCards"
+      :checked="getFeatureFlag('experimentalGitHubCards')"
       @click="toggleFeatureFlag('experimentalGitHubCards')"
     >
       {{ $t('settings.feature_flags.github_cards') }}
     </SettingsToggleItem>
     <SettingsToggleItem
-      :checked="currentUserFeatureFlags.experimentalUserPicker"
+      :checked="getFeatureFlag('experimentalUserPicker')"
       @click="toggleFeatureFlag('experimentalUserPicker')"
     >
       {{ $t('settings.feature_flags.user_picker') }}
diff --git a/plugins/setup-i18n.ts b/plugins/setup-i18n.ts
index 75d44634..aedeec9b 100644
--- a/plugins/setup-i18n.ts
+++ b/plugins/setup-i18n.ts
@@ -1,9 +1,9 @@
-import { COOKIE_MAX_AGE, STORAGE_KEY_LANG } from '~/constants'
+import { COOKIE_KEY_LOCALE, COOKIE_MAX_AGE } from '~/constants'
 
 export default defineNuxtPlugin(async (nuxt) => {
   const i18n = nuxt.vueApp.config.globalProperties.$i18n
   const { setLocale, locales } = nuxt.vueApp.config.globalProperties.$i18n
-  const cookieLocale = useCookie(STORAGE_KEY_LANG, { maxAge: COOKIE_MAX_AGE })
+  const cookieLocale = useCookie(COOKIE_KEY_LOCALE, { maxAge: COOKIE_MAX_AGE })
   const isFirstVisit = cookieLocale.value == null
 
   if (process.client && isFirstVisit) {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index f06f9834..8da09776 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -37,6 +37,7 @@ specifiers:
   '@vueuse/core': ^9.9.0
   '@vueuse/gesture': 2.0.0-beta.1
   '@vueuse/integrations': ^9.9.0
+  '@vueuse/math': ^9.10.0
   '@vueuse/motion': 2.0.0-beta.12
   '@vueuse/nuxt': ^9.9.0
   blurhash: ^2.0.4
@@ -147,6 +148,7 @@ devDependencies:
   '@unocss/nuxt': 0.48.0
   '@vitejs/plugin-vue': 3.2.0
   '@vue-macros/nuxt': 0.2.8_3nbxte3dhogb6b7pemmre2vo4m
+  '@vueuse/math': 9.10.0
   '@vueuse/nuxt': 9.9.0_nuxt@3.0.0
   bumpp: 8.2.1
   emoji-mart: 5.4.0
@@ -3658,6 +3660,16 @@ packages:
       - vue
     dev: false
 
+  /@vueuse/math/9.10.0:
+    resolution: {integrity: sha512-DvCyQFhXToPgZzSs841TCylIVwuab5gNErjdFCNWX3vs+T3rC8wMnlaBCYTXb5g4ruqm6K/hBnHyalRnCj/VbQ==}
+    dependencies:
+      '@vueuse/shared': 9.10.0
+      vue-demi: 0.13.11
+    transitivePeerDependencies:
+      - '@vue/composition-api'
+      - vue
+    dev: true
+
   /@vueuse/metadata/8.9.4:
     resolution: {integrity: sha512-IwSfzH80bnJMzqhaapqJl9JRIiyQU0zsRGEgnxN6jhq7992cPUJIRfV+JHRIZXjYqbwt07E1gTEp0R0zPJ1aqw==}
     dev: false
@@ -3714,6 +3726,15 @@ packages:
       vue-demi: 0.13.11
     dev: false
 
+  /@vueuse/shared/9.10.0:
+    resolution: {integrity: sha512-vakHJ2ZRklAzqmcVBL38RS7BxdBA4+5poG9NsSyqJxrt9kz0zX3P5CXMy0Hm6LFbZXUgvKdqAS3pUH1zX/5qTQ==}
+    dependencies:
+      vue-demi: 0.13.11
+    transitivePeerDependencies:
+      - '@vue/composition-api'
+      - vue
+    dev: true
+
   /@vueuse/shared/9.9.0:
     resolution: {integrity: sha512-+D0XFwHG0T+uaIbCSlROBwm1wzs71B7n3KyDOxnvfEMMHDOzl09rYKwaE2AENmYwYPXfHPbSBRDD2gBVHbvTcg==}
     dependencies: