diff --git a/src/utils/check.ts b/src/utils/check.ts
index 6afbd70..b4b73f1 100644
--- a/src/utils/check.ts
+++ b/src/utils/check.ts
@@ -26,7 +26,7 @@ export function getTodayStr(): string {
 export function isChecked(taskId: number): boolean {
   const all = loadCheckIns()
   const today = getTodayStr()
-  return !!(all[today] && all[today][taskId])
+  return (all[today] && all[today][taskId])
 }
 
 // 切换签到状态
@@ -48,32 +48,21 @@ export function getStreak(taskId: number): number {
   let streak = 0
   const d = new Date()
 
+  // 如果今天没签到，从昨天开始算
+  if (!all[getTodayStr()]?.[taskId]) {
+    d.setDate(d.getDate() - 1)
+  }
+
   while (true) {
     const key = `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`
-    if (all[key] && all[key][taskId]) {
+
+    if (all[key]?.[taskId]) {
       streak++
       d.setDate(d.getDate() - 1)
     } else {
       break
     }
   }
+
   return streak
 }
-
-// 今日已签到数量
-export function getTodayCheckedCount(): number {
-  const all = loadCheckIns()
-  const today = getTodayStr()
-  if (!all[today]) return 0
-  return Object.values(all[today]).filter(Boolean).length
-}
-
-// 所有任务中最长连续天数
-export function getMaxStreak(taskList: { id: number }[]): number {
-  let max = 0
-  taskList.forEach(t => {
-    const s = getStreak(t.id)
-    if (s > max) max = s
-  })
-  return max
-}