diff --git a/locales/en-US.yml b/locales/en-US.yml
index 1662f9158d88..bf693a67d0ed 100644
--- a/locales/en-US.yml
+++ b/locales/en-US.yml
@@ -481,6 +481,9 @@ passwordLessLogin: "Password-less login"
 passwordLessLoginDescription: "Allows password-less login using a security- or passkey only"
 resetPassword: "Reset password"
 newPasswordIs: "The new password is \"{password}\""
+hideNavFooter: "Automatically hide footer buttons on mobile devices"
+reduceUiMargin: "Reduce UI margins on mobile devices"
+largeNoteText: "Slightly enlarge note texts"
 reduceUiAnimation: "Reduce UI animations"
 share: "Share"
 notFound: "Not found"
diff --git a/locales/index.d.ts b/locales/index.d.ts
index a66761e33f91..741097eb1784 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -1950,6 +1950,18 @@ export interface Locale extends ILocale {
      * 新しいパスワードは「{password}」です
      */
     "newPasswordIs": ParameterizedString<"password">;
+    /**
+     * モバイルデバイスのとき下のボタンを自動で隠す
+     */
+    "hideNavFooter": string;
+    /**
+     * モバイルデバイスのときUIの余白を減らす
+     */
+    "reduceUiMargin": string;
+    /**
+     * ノートの文字を少し大きくする
+     */
+    "largeNoteText": string;
     /**
      * UIのアニメーションを減らす
      */
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index c653e5091f8e..8553696f5a36 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -483,6 +483,9 @@ passwordLessLogin: "パスワードレスログイン"
 passwordLessLoginDescription: "パスワードを使用せず、セキュリティキーやパスキーなどのみでログインします"
 resetPassword: "パスワードをリセット"
 newPasswordIs: "新しいパスワードは「{password}」です"
+hideNavFooter: "モバイルデバイスのとき下のボタンを自動で隠す"
+reduceUiMargin: "モバイルデバイスのときUIの余白を減らす"
+largeNoteText: "ノートの文字を少し大きくする"
 reduceUiAnimation: "UIのアニメーションを減らす"
 share: "共有"
 notFound: "見つかりません"
diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index 397838ca08a7..860a894078cc 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -45,7 +45,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<MkAvatar :class="$style.collapsedRenoteTargetAvatar" :user="appearNote.user" link preview/>
 		<Mfm :text="getNoteSummary(appearNote)" :plain="true" :nowrap="true" :author="appearNote.user" :nyaize="'respect'" :class="$style.collapsedRenoteTargetText" @click="renoteCollapsed = false"/>
 	</div>
-	<article v-else :class="$style.article" @contextmenu.stop="onContextmenu">
+	<article v-else :class="[$style.article, defaultStore.state.reduceMargin ? $style.reduceMargin : null]" @contextmenu.stop="onContextmenu">
 		<div v-if="appearNote.channel" :class="$style.colorBar" :style="{ background: appearNote.channel.color }"></div>
 		<MkAvatar :class="$style.avatar" :user="appearNote.user" :link="!mock" :preview="!mock"/>
 		<div :class="$style.main">
@@ -64,7 +64,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 					<MkCwButton v-model="showContent" :text="appearNote.text" :renote="appearNote.renote" :files="appearNote.files" :poll="appearNote.poll" style="margin: 4px 0;"/>
 				</p>
 				<div v-show="appearNote.cw == null || showContent" :class="[{ [$style.contentCollapsed]: collapsed }]">
-					<div :class="$style.text">
+					<div :class="[$style.text, defaultStore.state.largeNoteText ? $style.largeText : null]">
 						<span v-if="appearNote.isHidden" style="opacity: 0.5">({{ i18n.ts.private }})</span>
 						<MkA v-if="appearNote.replyId" :class="$style.replyIcon" :to="`/notes/${appearNote.replyId}`"><i class="ti ti-arrow-back-up"></i></MkA>
 						<Mfm
@@ -878,6 +878,11 @@ function emitUpdReaction(emoji: string, delta: number) {
 	overflow-wrap: break-word;
 }
 
+.text.largeText {
+	font-size: 1.1em;
+	line-height: 1.4;
+}
+
 .replyIcon {
 	color: var(--MI_THEME-accent);
 	margin-right: 0.5em;
@@ -951,6 +956,10 @@ function emitUpdReaction(emoji: string, delta: number) {
 		padding: 24px 26px;
 	}
 
+	.article.reduceMargin {
+		padding: 10px 14px 17px;
+	}
+
 	.avatar {
 		width: 50px;
 		height: 50px;
@@ -970,6 +979,10 @@ function emitUpdReaction(emoji: string, delta: number) {
 		padding: 20px 22px;
 	}
 
+	.article.reduceMargin {
+		padding: 9px 13px 16px;
+	}
+
 	.footer {
 		margin-bottom: -8px;
 	}
@@ -992,6 +1005,10 @@ function emitUpdReaction(emoji: string, delta: number) {
 	.article {
 		padding: 14px 16px;
 	}
+
+	.article.reduceMargin {
+		padding: 8px 11px 13px;
+	}
 }
 
 @container (max-width: 450px) {
diff --git a/packages/frontend/src/pages/settings/general.vue b/packages/frontend/src/pages/settings/general.vue
index 1bfdfd0e7665..cb72040ae847 100644
--- a/packages/frontend/src/pages/settings/general.vue
+++ b/packages/frontend/src/pages/settings/general.vue
@@ -117,6 +117,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 		<div class="_gaps_m">
 			<div class="_gaps_s">
+				<MkSwitch v-model="reduceMargin">{{ i18n.ts.reduceUiMargin }}</MkSwitch>
+				<MkSwitch v-model="largeNoteText">{{ i18n.ts.largeNoteText }}</MkSwitch>
+				<MkSwitch v-model="hideNavFooter">{{ i18n.ts.hideNavFooter }}</MkSwitch>
 				<MkSwitch v-model="reduceAnimation">{{ i18n.ts.reduceUiAnimation }}</MkSwitch>
 				<MkSwitch v-model="useBlurEffect">{{ i18n.ts.useBlurEffect }}</MkSwitch>
 				<MkSwitch v-model="useBlurEffectForModal">{{ i18n.ts.useBlurEffectForModal }}</MkSwitch>
@@ -284,6 +287,9 @@ const showClipButtonInNoteFooter = computed(defaultStore.makeGetterSetter('showC
 const reactionsDisplaySize = computed(defaultStore.makeGetterSetter('reactionsDisplaySize'));
 const limitWidthOfReaction = computed(defaultStore.makeGetterSetter('limitWidthOfReaction'));
 const collapseRenotes = computed(defaultStore.makeGetterSetter('collapseRenotes'));
+const reduceMargin = computed(defaultStore.makeGetterSetter('reduceMargin'));
+const largeNoteText = computed(defaultStore.makeGetterSetter('largeNoteText'));
+const hideNavFooter = computed(defaultStore.makeGetterSetter('hideNavFooter'));
 const reduceAnimation = computed(defaultStore.makeGetterSetter('animation', v => !v, v => !v));
 const useBlurEffectForModal = computed(defaultStore.makeGetterSetter('useBlurEffectForModal'));
 const useBlurEffect = computed(defaultStore.makeGetterSetter('useBlurEffect'));
@@ -364,6 +370,9 @@ watch([
 	alwaysConfirmFollow,
 	confirmWhenRevealingSensitiveMedia,
 	contextMenu,
+	reduceMargin,
+	largeNoteText,
+	hideNavFooter,
 ], async () => {
 	await reloadAsk({ reason: i18n.ts.reloadToApplySetting, unison: true });
 });
diff --git a/packages/frontend/src/pages/timeline.vue b/packages/frontend/src/pages/timeline.vue
index 77b5328a339e..d8f1161b7168 100644
--- a/packages/frontend/src/pages/timeline.vue
+++ b/packages/frontend/src/pages/timeline.vue
@@ -6,7 +6,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 <template>
 <MkStickyContainer>
 	<template #header><MkPageHeader v-model:tab="src" :actions="headerActions" :tabs="$i ? headerTabs : headerTabsWhenNotLogin" :displayMyAvatar="true"/></template>
-	<MkSpacer :contentMax="800">
+	<MkSpacer :contentMax="800" :marginMin="marginMin">
 		<MkHorizontalSwipe v-model:tab="src" :tabs="$i ? headerTabs : headerTabsWhenNotLogin">
 			<div :key="src" ref="rootEl">
 				<MkInfo v-if="isBasicTimeline(src) && !defaultStore.reactiveState.timelineTutorials.value[src]" style="margin-bottom: var(--MI-margin);" closable @close="closeTutorial()">
@@ -63,6 +63,16 @@ provide('shouldOmitHeaderTitle', true);
 const tlComponent = shallowRef<InstanceType<typeof MkTimeline>>();
 const rootEl = shallowRef<HTMLElement>();
 
+const DESKTOP_THRESHOLD = 1100;
+const MOBILE_THRESHOLD = 500;
+
+const isDesktop = ref(window.innerWidth >= DESKTOP_THRESHOLD);
+const isMobile = ref(deviceKind === 'smartphone' || window.innerWidth <= MOBILE_THRESHOLD);
+
+window.addEventListener('resize', () => {
+	isMobile.value = deviceKind === 'smartphone' || window.innerWidth <= MOBILE_THRESHOLD;
+});
+
 const router = useRouter();
 
 type TimelinePageSrc = BasicTimelineType | `list:${string}`;
@@ -351,6 +361,10 @@ const headerTabsWhenNotLogin = computed(() => [...availableBasicTimelines().map(
 	iconOnly: true,
 }))] as Tab[]);
 
+const marginMin = computed(() =>
+	(defaultStore.state.reduceMargin && isMobile.value) ? 0 : 16
+);
+
 definePageMetadata(() => ({
 	title: i18n.ts.timeline,
 	icon: isBasicTimeline(src.value) ? basicTimelineIconClass(src.value) : 'ti ti-home',
diff --git a/packages/frontend/src/store.ts b/packages/frontend/src/store.ts
index 94329f45c9e5..b949a1fc87cc 100644
--- a/packages/frontend/src/store.ts
+++ b/packages/frontend/src/store.ts
@@ -222,6 +222,18 @@ export const defaultStore = markRaw(new Storage('base', {
 		where: 'device',
 		default: false,
 	},
+	hideNavFooter: {
+		where: 'device',
+		default: false,
+	},
+	reduceMargin: {
+		where: 'device',
+		default: true,
+	},
+	largeNoteText: {
+		where: 'device',
+		default: true,
+	},
 	animation: {
 		where: 'device',
 		default: !window.matchMedia('(prefers-reduced-motion)').matches,
diff --git a/packages/frontend/src/ui/universal.vue b/packages/frontend/src/ui/universal.vue
index 7711b248cdfd..504c11f20713 100644
--- a/packages/frontend/src/ui/universal.vue
+++ b/packages/frontend/src/ui/universal.vue
@@ -26,7 +26,13 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 	<button v-if="(!isDesktop || pageMetadata?.needWideArea) && !isMobile" :class="$style.widgetButton" class="_button" @click="widgetsShowing = true"><i class="ti ti-apps"></i></button>
 
-	<div v-if="isMobile" ref="navFooter" :class="$style.nav">
+	<Transition
+		:enterActiveClass="$style.transition_navFooter_enterActive"
+		:leaveActiveClass="$style.transition_navFooter_leaveActive"
+		:enterFromClass="$style.transition_navFooter_enterFrom"
+		:leaveToClass="$style.transition_navFooter_leaveTo"
+	>
+	<div v-if="isMobile && navFooterShowing" ref="navFooter" :class="$style.nav">
 		<button :class="$style.navButton" class="_button" @click="drawerMenuShowing = true"><i :class="$style.navButtonIcon" class="ti ti-menu-2"></i><span v-if="menuIndicated" :class="$style.navButtonIndicator" class="_blink"><i class="_indicatorCircle"></i></span></button>
 		<button :class="$style.navButton" class="_button" @click="isRoot ? top() : mainRouter.push('/')"><i :class="$style.navButtonIcon" class="ti ti-home"></i></button>
 		<button :class="$style.navButton" class="_button" @click="mainRouter.push('/my/notifications')">
@@ -38,6 +44,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<button :class="$style.navButton" class="_button" @click="widgetsShowing = true"><i :class="$style.navButtonIcon" class="ti ti-apps"></i></button>
 		<button :class="$style.postButton" class="_button" @click="os.post()"><i :class="$style.navButtonIcon" class="ti ti-pencil"></i></button>
 	</div>
+	</Transition>
 
 	<Transition
 		:enterActiveClass="defaultStore.state.animation ? $style.transition_menuDrawerBg_enterActive : ''"
@@ -134,6 +141,7 @@ window.addEventListener('resize', () => {
 
 const pageMetadata = ref<null | PageMetadata>(null);
 const widgetsShowing = ref(false);
+const navFooterShowing = ref(true);
 const navFooter = shallowRef<HTMLElement>();
 const contents = shallowRef<InstanceType<typeof MkStickyContainer>>();
 
@@ -194,12 +202,35 @@ defaultStore.loaded.then(() => {
 	}
 });
 
+let scrollHistory = [];
 onMounted(() => {
 	if (!isDesktop.value) {
 		window.addEventListener('resize', () => {
 			if (window.innerWidth >= DESKTOP_THRESHOLD) isDesktop.value = true;
 		}, { passive: true });
 	}
+	if (defaultStore.state.hideNavFooter) {
+		contents.value.rootEl.addEventListener('scroll', () => {
+			const now = new Date();
+			scrollHistory = scrollHistory.filter(x => (now - x.time < 2000) && (now > x.time));
+			let scrollPosition = contents.value.rootEl.scrollTop;
+			scrollHistory.push({ time: now, position: scrollPosition });
+			if (scrollHistory.length === 1) {
+				return;
+			}
+			let diffPosition = scrollPosition - scrollHistory[0].position;
+			let diffTime = now - scrollHistory[0].time;
+			let scrollSpeed = diffPosition / diffTime;
+			if (scrollPosition === 0) {
+				navFooterShowing.value = true;
+				scrollHistory = [];
+			} else if (scrollSpeed > 0.2 && diffPosition > 300 || scrollSpeed < -0.5 && diffPosition < -600) {
+				navFooterShowing.value = false;
+			} else if (-0.2 < scrollSpeed && scrollSpeed < 0.02) {
+				navFooterShowing.value = true;
+			}
+		}, { passive: true });
+	}
 });
 
 const iconOnly = ref(false);
@@ -284,6 +315,20 @@ body {
 $ui-font-size: 1em; // TODO: どこかに集約したい
 $widgets-hide-threshold: 1090px;
 
+.transition_navFooter_enterActive {
+	opacity: 1;
+	transition: opacity 300ms cubic-bezier(0.23, 1, 0.32, 1);
+}
+.transition_navFooter_leaveActive {
+	opacity: 1;
+	transition: opacity 800ms cubic-bezier(0.23, 1, 0.32, 1);
+}
+
+.transition_navFooter_enterFrom,
+.transition_navFooter_leaveTo {
+	opacity: 0;
+}
+
 .transition_menuDrawerBg_enterActive,
 .transition_menuDrawerBg_leaveActive {
 	opacity: 1;