diff --git a/apps/ui/src/App.tsx b/apps/ui/src/App.tsx
index 93f40f5..25aa474 100644
--- a/apps/ui/src/App.tsx
+++ b/apps/ui/src/App.tsx
@@ -231,9 +231,6 @@ const App = () => {
 			log_retention_days: String(data.settings.log_retention_days ?? 30),
 			session_ttl_hours: String(data.settings.session_ttl_hours ?? 12),
 			admin_password: "",
-			checkin_schedule_enabled: Boolean(
-				data.settings.checkin_schedule_enabled ?? false,
-			),
 			checkin_schedule_time: data.settings.checkin_schedule_time ?? "00:10",
 		});
 	}, [data.settings]);
@@ -499,7 +496,6 @@ const App = () => {
 			const payload: Record<string, number | string | boolean> = {
 				log_retention_days: retention,
 				session_ttl_hours: sessionTtlHours,
-				checkin_schedule_enabled: settingsForm.checkin_schedule_enabled,
 				checkin_schedule_time:
 					settingsForm.checkin_schedule_time.trim() || "00:10",
 			};
diff --git a/apps/ui/src/core/constants.ts b/apps/ui/src/core/constants.ts
index 2bedc9f..eb2e266 100644
--- a/apps/ui/src/core/constants.ts
+++ b/apps/ui/src/core/constants.ts
@@ -42,6 +42,5 @@ export const initialSettingsForm: SettingsForm = {
 	log_retention_days: "30",
 	session_ttl_hours: "12",
 	admin_password: "",
-	checkin_schedule_enabled: false,
 	checkin_schedule_time: "00:10",
 };
diff --git a/apps/ui/src/core/types.ts b/apps/ui/src/core/types.ts
index 74ff9ed..c98d6d7 100644
--- a/apps/ui/src/core/types.ts
+++ b/apps/ui/src/core/types.ts
@@ -80,7 +80,6 @@ export type Settings = {
 	log_retention_days: number;
 	session_ttl_hours: number;
 	admin_password_set?: boolean;
-	checkin_schedule_enabled?: boolean;
 	checkin_schedule_time?: string;
 };
 
@@ -139,7 +138,6 @@ export type SettingsForm = {
 	log_retention_days: string;
 	session_ttl_hours: string;
 	admin_password: string;
-	checkin_schedule_enabled: boolean;
 	checkin_schedule_time: string;
 };
 
diff --git a/apps/ui/src/features/SettingsView.tsx b/apps/ui/src/features/SettingsView.tsx
index adae2b0..7a8baff 100644
--- a/apps/ui/src/features/SettingsView.tsx
+++ b/apps/ui/src/features/SettingsView.tsx
@@ -73,30 +73,6 @@ export const SettingsView = ({
 					}}
 				/>
 			</div>
-			<div>
-				<label
-					class="mb-1.5 block text-xs uppercase tracking-widest text-stone-500"
-					for="checkin-schedule-enabled"
-				>
-					定时签到
-				</label>
-				<div class="flex items-center gap-3 rounded-lg border border-stone-200 bg-white px-3 py-2.5">
-					<input
-						class="h-4 w-4 accent-stone-900"
-						id="checkin-schedule-enabled"
-						name="checkin_schedule_enabled"
-						type="checkbox"
-						checked={settingsForm.checkin_schedule_enabled}
-						onChange={(event) => {
-							const target = event.currentTarget as HTMLInputElement | null;
-							onFormChange({
-								checkin_schedule_enabled: Boolean(target?.checked),
-							});
-						}}
-					/>
-					<span class="text-sm text-stone-700">启用（中国时间）</span>
-				</div>
-			</div>
 			<div>
 				<label
 					class="mb-1.5 block text-xs uppercase tracking-widest text-stone-500"
diff --git a/apps/worker/src/routes/settings.ts b/apps/worker/src/routes/settings.ts
index c9dd19e..e941d9f 100644
--- a/apps/worker/src/routes/settings.ts
+++ b/apps/worker/src/routes/settings.ts
@@ -1,12 +1,12 @@
 import { Hono } from "hono";
 import type { AppEnv } from "../env";
 import {
-	getCheckinSchedule,
+	getCheckinScheduleTime,
 	getRetentionDays,
 	getSessionTtlHours,
 	isAdminPasswordSet,
 	setAdminPasswordHash,
-	setCheckinSchedule,
+	setCheckinScheduleTime,
 	setRetentionDays,
 	setSessionTtlHours,
 } from "../services/settings";
@@ -26,13 +26,12 @@ settings.get("/", async (c) => {
 	const retention = await getRetentionDays(c.env.DB);
 	const sessionTtlHours = await getSessionTtlHours(c.env.DB);
 	const adminPasswordSet = await isAdminPasswordSet(c.env.DB);
-	const checkinSchedule = await getCheckinSchedule(c.env.DB);
+	const checkinScheduleTime = await getCheckinScheduleTime(c.env.DB);
 	return c.json({
 		log_retention_days: retention,
 		session_ttl_hours: sessionTtlHours,
 		admin_password_set: adminPasswordSet,
-		checkin_schedule_enabled: checkinSchedule.enabled,
-		checkin_schedule_time: checkinSchedule.time,
+		checkin_schedule_time: checkinScheduleTime,
 	});
 });
 
@@ -83,34 +82,9 @@ settings.put("/", async (c) => {
 		touched = true;
 	}
 
-	if (
-		body.checkin_schedule_enabled !== undefined ||
-		body.checkin_schedule_time !== undefined
-	) {
-		const current = await getCheckinSchedule(c.env.DB);
-		const enabledRaw = body.checkin_schedule_enabled;
-		const enabled =
-			enabledRaw === undefined
-				? current.enabled
-				: enabledRaw === true || enabledRaw === "true";
-		if (
-			enabledRaw !== undefined &&
-			enabledRaw !== true &&
-			enabledRaw !== false
-		) {
-			if (enabledRaw !== "true" && enabledRaw !== "false") {
-				return jsonError(
-					c,
-					400,
-					"invalid_checkin_schedule_enabled",
-					"invalid_checkin_schedule_enabled",
-				);
-			}
-		}
-		const timeValue =
-			body.checkin_schedule_time !== undefined
-				? String(body.checkin_schedule_time).trim()
-				: current.time;
+	if (body.checkin_schedule_time !== undefined) {
+		const currentTime = await getCheckinScheduleTime(c.env.DB);
+		const timeValue = String(body.checkin_schedule_time).trim();
 		if (!/^\d{2}:\d{2}$/.test(timeValue)) {
 			return jsonError(
 				c,
@@ -135,13 +109,10 @@ settings.put("/", async (c) => {
 				"invalid_checkin_schedule_time",
 			);
 		}
-		await setCheckinSchedule(c.env.DB, { enabled, time: timeValue });
+		await setCheckinScheduleTime(c.env.DB, timeValue);
 		touched = true;
 		scheduleTouched = true;
-		scheduleReset = shouldResetLastRun(current, {
-			enabled,
-			time: timeValue,
-		});
+		scheduleReset = shouldResetLastRun(currentTime, timeValue);
 	}
 
 	if (!touched) {
diff --git a/apps/worker/src/services/checkin-scheduler.ts b/apps/worker/src/services/checkin-scheduler.ts
index 3506576..647e454 100644
--- a/apps/worker/src/services/checkin-scheduler.ts
+++ b/apps/worker/src/services/checkin-scheduler.ts
@@ -3,7 +3,7 @@ import type {
 	DurableObjectState,
 } from "@cloudflare/workers-types";
 import type { Bindings } from "../env";
-import { getCheckinSchedule } from "./settings";
+import { getCheckinScheduleTime } from "./settings";
 import { runCheckinAll } from "./checkin-runner";
 import {
 	beijingDateString,
@@ -31,17 +31,9 @@ export const shouldRunCheckin = (
 };
 
 export const shouldResetLastRun = (
-	current: { enabled: boolean; time: string },
-	next: { enabled: boolean; time: string },
-) => {
-	if (!next.enabled) {
-		return false;
-	}
-	if (current.enabled !== next.enabled) {
-		return next.enabled;
-	}
-	return current.time !== next.time;
-};
+	currentTime: string,
+	nextTime: string,
+) => currentTime !== nextTime;
 
 export const computeNextAlarmAt = (
 	now: Date,
@@ -59,7 +51,6 @@ export const computeNextAlarmAt = (
 };
 
 type RescheduleResult = {
-	enabled: boolean;
 	nextRunAt: string | null;
 };
 
@@ -107,14 +98,10 @@ export class CheckinScheduler {
 
 	private async handleAlarm(): Promise<void> {
 		const now = new Date();
-		const schedule = await getCheckinSchedule(this.env.DB);
-		if (!schedule.enabled) {
-			await this.state.storage.deleteAlarm();
-			return;
-		}
+		const scheduleTime = await getCheckinScheduleTime(this.env.DB);
 		const lastRunDate =
 			(await this.state.storage.get<string>(LAST_RUN_DATE_KEY)) ?? null;
-		if (shouldRunCheckin(now, schedule.time, lastRunDate)) {
+		if (shouldRunCheckin(now, scheduleTime, lastRunDate)) {
 			await runCheckinAll(this.env.DB, now);
 			await this.state.storage.put(LAST_RUN_DATE_KEY, beijingDateString(now));
 		}
@@ -125,16 +112,12 @@ export class CheckinScheduler {
 		now: Date = new Date(),
 		reset = false,
 	): Promise<RescheduleResult> {
-		const schedule = await getCheckinSchedule(this.env.DB);
-		if (!schedule.enabled) {
-			await this.state.storage.deleteAlarm();
-			return { enabled: false, nextRunAt: null };
-		}
+		const scheduleTime = await getCheckinScheduleTime(this.env.DB);
 		if (reset) {
 			await this.state.storage.delete(LAST_RUN_DATE_KEY);
 		}
-		const nextRun = computeNextAlarmAt(now, schedule.time, reset);
+		const nextRun = computeNextAlarmAt(now, scheduleTime, reset);
 		await this.state.storage.setAlarm(nextRun.getTime());
-		return { enabled: true, nextRunAt: nextRun.toISOString() };
+		return { nextRunAt: nextRun.toISOString() };
 	}
 }
diff --git a/apps/worker/src/services/settings.ts b/apps/worker/src/services/settings.ts
index 2980b99..51d4b19 100644
--- a/apps/worker/src/services/settings.ts
+++ b/apps/worker/src/services/settings.ts
@@ -7,7 +7,6 @@ const DEFAULT_CHECKIN_SCHEDULE_TIME = "00:10";
 const RETENTION_KEY = "log_retention_days";
 const SESSION_TTL_KEY = "session_ttl_hours";
 const ADMIN_PASSWORD_HASH_KEY = "admin_password_hash";
-const CHECKIN_SCHEDULE_ENABLED_KEY = "checkin_schedule_enabled";
 const CHECKIN_SCHEDULE_TIME_KEY = "checkin_schedule_time";
 
 async function readSetting(
@@ -113,24 +112,20 @@ export async function isAdminPasswordSet(db: D1Database): Promise<boolean> {
 	return Boolean(hash);
 }
 
-export async function getCheckinSchedule(db: D1Database): Promise<{
-	enabled: boolean;
-	time: string;
-}> {
-	const enabledRaw = await readSetting(db, CHECKIN_SCHEDULE_ENABLED_KEY);
+export async function getCheckinScheduleTime(
+	db: D1Database,
+): Promise<string> {
 	const timeRaw = await readSetting(db, CHECKIN_SCHEDULE_TIME_KEY);
-	const enabled = enabledRaw ? enabledRaw === "true" : false;
-	const time =
-		timeRaw && timeRaw.length > 0 ? timeRaw : DEFAULT_CHECKIN_SCHEDULE_TIME;
-	return { enabled, time };
+	return timeRaw && timeRaw.length > 0
+		? timeRaw
+		: DEFAULT_CHECKIN_SCHEDULE_TIME;
 }
 
-export async function setCheckinSchedule(
+export async function setCheckinScheduleTime(
 	db: D1Database,
-	input: { enabled: boolean; time: string },
+	time: string,
 ): Promise<void> {
-	await upsertSetting(db, CHECKIN_SCHEDULE_ENABLED_KEY, String(input.enabled));
-	await upsertSetting(db, CHECKIN_SCHEDULE_TIME_KEY, input.time);
+	await upsertSetting(db, CHECKIN_SCHEDULE_TIME_KEY, time);
 }
 
 /**
diff --git a/helloagents/CHANGELOG.md b/helloagents/CHANGELOG.md
index 740d783..0189c70 100644
--- a/helloagents/CHANGELOG.md
+++ b/helloagents/CHANGELOG.md
@@ -89,6 +89,14 @@
   - 类型: 微调（无方案包）
   - 文件: apps/worker/src/routes/proxy.ts
 
+## [0.8.4] - 2026-02-25
+
+### 变更
+- **[checkin/settings]**: 定时签到改为始终启用，仅保留签到时间配置
+  - 方案: [202602251706_checkin-always-on](archive/2026-02/202602251706_checkin-always-on/)
+- **[admin-ui]**: 设置页移除定时签到启用开关
+  - 方案: [202602251706_checkin-always-on](archive/2026-02/202602251706_checkin-always-on/)
+
 ## [0.8.3] - 2026-02-25
 
 ### 修复
diff --git a/helloagents/modules/checkin.md b/helloagents/modules/checkin.md
index 81d0cc6..c291c8b 100644
--- a/helloagents/modules/checkin.md
+++ b/helloagents/modules/checkin.md
@@ -16,8 +16,8 @@
 - `checkin_sites` CRUD 接口已移除，签到字段统一由 `channels` 承载
 - 一键签到会跳过 `last_checkin_date` 已是北京时间当日且状态为成功/已签的站点
 - 定时签到由 `CheckinScheduler` Durable Object 触发，每天最多执行一次
-- 定时签到在 `settings.checkin_schedule_enabled=true` 且到达设定时间时执行
-- 当签到时间或开关变更且已到新时间时，允许当日再次执行一次
+- 定时签到始终启用，仅按 `settings.checkin_schedule_time` 到点执行
+- 当签到时间变更且已到新时间时，允许当日再次执行一次
 - 手动签到优先打开 `checkin_url`，为空则打开 `base_url`
 - 签到执行使用 `checkin_url`（若为空则回退 `base_url`）拼接 `/api/user/checkin`
 - 请求头必须携带 `New-Api-User`（值来自站点的 `userid` 配置）
@@ -26,4 +26,4 @@
 ## 依赖关系
 - `worker` 路由与 D1 数据表 `channels`
 - `admin-ui` 负责前端交互与结果展示
-- `settings` 模块提供签到时间与开关配置
+- `settings` 模块提供签到时间配置
diff --git a/helloagents/modules/settings.md b/helloagents/modules/settings.md
index 3c5c27e..716df6a 100644
--- a/helloagents/modules/settings.md
+++ b/helloagents/modules/settings.md
@@ -3,7 +3,7 @@
 ## 职责
 - 维护系统级配置（如日志保留天数）
 - 为使用日志与面板提供统一配置读取
-- 维护定时签到的开关与执行时间
+- 维护定时签到执行时间
 
 ## 接口定义
 - `GET /api/settings` 读取设置
@@ -13,7 +13,7 @@
 - 配置写入后即时生效
 - 未配置时使用环境变量默认值
 - 定时签到时间使用 `HH:mm` 格式（默认 `00:10`，中国时间）
-- 更新签到时间或开关后会触发 `CheckinScheduler` 重新调度
+- 更新签到时间后会触发 `CheckinScheduler` 重新调度
 - 若更新后当前时间已超过新签到时间，当日可再次触发自动签到
 
 ## 依赖关系