diff --git a/src/api.py b/src/api.py
index 4fb342f..8fb9df4 100644
--- a/src/api.py
+++ b/src/api.py
@@ -12,7 +12,7 @@ from tenacity import retry, retry_if_exception_type, wait_random_exponential, st
 
 from src.config import Config
 from src.logger import GlobalLogger
-from src.measurer import SpeedMeasurer
+from src.measurer import Measurer
 from src.models import *
 
 
@@ -90,7 +90,7 @@ class WebAPI:
                     total = int(response.headers.get("Content-Length") if response.headers.get("Content-Length")
                                 else response.headers.get("X-Apple-MS-Content-Length"))
                     async for chunk in response.aiter_bytes():
-                        it(SpeedMeasurer).record_download(len(chunk))
+                        it(Measurer).record_download(len(chunk))
                         result.write(chunk)
                 if len(result.getvalue()) != total:
                     raise httpx.HTTPError
diff --git a/src/cmd.py b/src/cmd.py
index c0952a0..f0b2ef5 100644
--- a/src/cmd.py
+++ b/src/cmd.py
@@ -4,18 +4,18 @@ import sys
 
 from creart import it
 from prompt_toolkit import PromptSession
-from prompt_toolkit.patch_stdout import patch_stdout
 from prompt_toolkit.completion import NestedCompleter
+from prompt_toolkit.patch_stdout import patch_stdout
 
 from src.api import WebAPI
 from src.config import Config
 from src.flags import Flags
 from src.grpc.manager import WrapperManager, WrapperManagerException
 from src.logger import GlobalLogger
-from src.measurer import SpeedMeasurer
+from src.measurer import Measurer
 from src.rip import on_decrypt_success, on_decrypt_failed, rip_song, rip_album, rip_artist, rip_playlist
 from src.url import AppleMusicURL, URLType
-from src.utils import check_dep, run_sync, safely_create_task, get_tasks_num, config_outdated
+from src.utils import check_dep, run_sync, safely_create_task, config_outdated
 
 
 class InteractiveShell:
@@ -99,7 +99,7 @@ class InteractiveShell:
                 return
 
     def bottom_toolbar(self):
-        return f"Download Speed: {it(SpeedMeasurer).download_speed()}, Decrypt Speed: {it(SpeedMeasurer).decrypt_speed()}, Tasks: {get_tasks_num()-2}"
+        return f"Download Speed: {it(Measurer).download_speed()}, Decrypt Speed: {it(Measurer).decrypt_speed()}, Tasks: {it(Measurer).tasks_count()}"
 
     def completer(self):
         mycompleter = {
@@ -144,7 +144,8 @@ class InteractiveShell:
                     await self.logout_flow()
                 elif command.strip() == '':
                     continue
-                else: await self.command_parser(command)
+                else:
+                    await self.command_parser(command)
             except (EOFError, KeyboardInterrupt):
                 return
 
diff --git a/src/measurer.py b/src/measurer.py
index af1d649..af15519 100644
--- a/src/measurer.py
+++ b/src/measurer.py
@@ -5,11 +5,12 @@ from typing import Type
 from creart import CreateTargetInfo, AbstractCreator, exists_module
 
 
-class SpeedMeasurer:
+class Measurer:
     def __init__(self, sample_window=1):
         self._sample_window = sample_window
         self._download_records = deque()  # 存储 (时间戳, 字节数)
         self._decrypt_records = deque()  # 存储 (时间戳, 字节数)
+        self._running_tasks = 0
 
     def record_download(self, content_length: int):
         now = time.time()
@@ -19,6 +20,12 @@ class SpeedMeasurer:
         now = time.time()
         self._decrypt_records.append((now, content_length))
 
+    def record_task_start(self):
+        self._running_tasks += 1
+
+    def record_task_finish(self):
+        self._running_tasks -= 1
+
     def download_speed(self) -> str:
         now = time.time()
         self._evict_old(self._download_records, now)
@@ -29,6 +36,9 @@ class SpeedMeasurer:
         self._evict_old(self._decrypt_records, now)
         return self._calc_speed(self._decrypt_records)
 
+    def tasks_count(self):
+        return self._running_tasks
+
     def _evict_old(self, dq, now):
         """只保留采样窗口内的数据"""
         while dq and now - dq[0][0] > self._sample_window:
@@ -47,7 +57,7 @@ class SpeedMeasurer:
 
 class MeasurerCreator(AbstractCreator):
     targets = (
-        CreateTargetInfo("src.measurer", "SpeedMeasurer"),
+        CreateTargetInfo("src.measurer", "Measurer"),
     )
 
     @staticmethod
@@ -55,5 +65,5 @@ class MeasurerCreator(AbstractCreator):
         return exists_module("src.config")
 
     @staticmethod
-    def create(create_type: Type[SpeedMeasurer]) -> SpeedMeasurer:
+    def create(create_type: Type[Measurer]) -> Measurer:
         return create_type()
diff --git a/src/rip.py b/src/rip.py
index f2e337d..b1f3b26 100644
--- a/src/rip.py
+++ b/src/rip.py
@@ -10,7 +10,7 @@ from src.exceptions import CodecNotFoundException
 from src.flags import Flags
 from src.grpc.manager import WrapperManager, WrapperManagerException
 from src.logger import RipLogger
-from src.measurer import SpeedMeasurer
+from src.measurer import Measurer
 from src.metadata import SongMetadata
 from src.models import PlaylistInfo
 from src.mp4 import extract_media, extract_song, encapsulate, write_metadata, fix_encapsulate, fix_esds_box, \
@@ -37,10 +37,11 @@ async def task_done(task: Task, status: Status):
     if task.parentDone:
         await task.parentDone.try_done()
     del adam_id_task_mapping[task.adamId]
+    it(Measurer).record_task_finish()
 
 
 async def on_decrypt_success(adam_id: str, key: str, sample: bytes, sample_index: int):
-    it(SpeedMeasurer).record_decrypt(len(sample))
+    it(Measurer).record_decrypt(len(sample))
     safely_create_task(recv_decrypted_sample(adam_id, sample_index, sample))
 
 
@@ -89,6 +90,7 @@ async def rip_song(url: Song, codec: str, flags: Flags = Flags(),
     adam_id_task_mapping[url.id] = task
     task.init_logger()
     await task_lock.acquire()
+    it(Measurer).record_task_start()
 
     # Set Metadata
     raw_metadata = await it(WebAPI).get_song_info(task.adamId, url.storefront, flags.language)