diff --git a/main.py b/main.py
index fe7c9c6..241534a 100644
--- a/main.py
+++ b/main.py
@@ -1,3 +1,4 @@
+"""Entry point."""
 import sys
 
 from environs import Env
@@ -10,6 +11,7 @@ from src.patches import Patches
 
 
 def main() -> None:
+    """Entry point."""
     env = Env()
     config = RevancedConfig(env)
 
diff --git a/src/config.py b/src/config.py
index a7514d1..cb18fec 100644
--- a/src/config.py
+++ b/src/config.py
@@ -1,3 +1,4 @@
+"""Revanced Configurations."""
 from pathlib import Path
 from typing import List
 
@@ -8,6 +9,8 @@ from src.utils import supported_apps
 
 
 class RevancedConfig:
+    """Revanced Configurations."""
+
     def __init__(self, env: Env) -> None:
         self.env = env
         self.temp_folder = Path("apks")
diff --git a/src/downloader.py b/src/downloader.py
index fb11132..710fed6 100644
--- a/src/downloader.py
+++ b/src/downloader.py
@@ -1,3 +1,4 @@
+"""Downloader Class."""
 import re
 import sys
 from concurrent.futures import ThreadPoolExecutor
@@ -14,6 +15,8 @@ from src.config import RevancedConfig
 
 
 class Downloader(object):
+    """Files downloader."""
+
     def __init__(self, config: RevancedConfig):
         self._CHUNK_SIZE = 2**21 * 5
         self._QUEUE: PriorityQueue[Tuple[float, str]] = PriorityQueue()
@@ -43,6 +46,11 @@ class Downloader(object):
         logger.debug(f"Downloaded {file_name}")
 
     def extract_download_link(self, page: str, app: str) -> None:
+        """Function to extract the download link from apkmirror html page.
+
+        :param page: Url of the page
+        :param app: Name of the app
+        """
         logger.debug(f"Extracting download link from\n{page}")
         parser = LexborHTMLParser(self.config.session.get(page).text)
 
@@ -58,6 +66,12 @@ class Downloader(object):
         logger.debug("Finished Extracting link and downloading")
 
     def get_download_page(self, parser: LexborHTMLParser, main_page: str) -> str:
+        """Function to get the download page in apk_mirror.
+
+        :param parser: Parser
+        :param main_page: Main Download Page in APK mirror(Index)
+        :return:
+        """
         apm = parser.css(".apkm-badge")
         sub_url = ""
         for is_apm in apm:
@@ -84,6 +98,12 @@ class Downloader(object):
         return app_version
 
     def apkmirror_specific_version(self, app: str, version: str) -> str:
+        """Function to download the specified version of app from  apkmirror.
+
+        :param app: Name of the application
+        :param version: Version of the application to download
+        :return: Version of downloaded apk
+        """
         logger.debug(f"Trying to download {app},specific version {version}")
         version = version.replace(".", "-")
         main_page = f"{self.config.apk_mirror_version_urls.get(app)}-{version}-release/"
@@ -94,6 +114,12 @@ class Downloader(object):
         return version
 
     def apkmirror_latest_version(self, app: str) -> str:
+        """Function to download whatever the latest version of app from
+        apkmirror.
+
+        :param app: Name of the application
+        :return: Version of downloaded apk
+        """
         logger.debug(f"Trying to download {app}'s latest version from apkmirror")
         page = self.config.apk_mirror_urls.get(app)
         if not page:
@@ -119,6 +145,12 @@ class Downloader(object):
         return version
 
     def repository(self, owner: str, name: str, file_name: str) -> None:
+        """Function to download files from GitHub repositories.
+
+        :param owner: github user/organization
+        :param name: name of the repository
+        :param file_name: name of the file after downloading
+        """
         logger.debug(f"Trying to download {name} from github")
         repo_url = f"https://api.github.com/repos/{owner}/{name}/releases/latest"
         r = requests.get(
@@ -131,6 +163,7 @@ class Downloader(object):
         self._download(download_url, file_name=file_name)
 
     def download_revanced(self) -> None:
+        """Download Revanced and Extended Patches, Integration and CLI."""
         assets = [
             ["revanced", "revanced-cli", self.config.normal_cli_jar],
             ["revanced", "revanced-integrations", self.config.normal_integrations_apk],
@@ -148,15 +181,32 @@ class Downloader(object):
         logger.info("Downloaded revanced microG ,cli, integrations and patches.")
 
     def upto_down_downloader(self, app: str) -> str:
+        """Function to download from UptoDown.
+
+        :param app: Name of the application
+        :return: Version of downloaded APK
+        """
         return self.__upto_down_downloader(app)
 
     def download_from_apkmirror(self, version: str, app: str) -> str:
+        """Function to download from apkmirror.
+
+        :param version: version to download
+        :param app: App to download
+        :return: Version of downloaded APK
+        """
         if version and version != "latest":
             return self.apkmirror_specific_version(app, version)
         else:
             return self.apkmirror_latest_version(app)
 
     def download_apk_to_patch(self, version: str, app: str) -> str:
+        """Public function to download apk to patch.
+
+        :param version: version to download
+        :param app: App to download
+        :return: Version of apk
+        """
         if app in self.config.upto_down:
             return self.upto_down_downloader(app)
         else:
diff --git a/src/parser.py b/src/parser.py
index e3222f0..d9a483c 100644
--- a/src/parser.py
+++ b/src/parser.py
@@ -1,3 +1,4 @@
+"""Revanced Parser."""
 import sys
 from subprocess import PIPE, Popen
 from time import perf_counter
@@ -10,6 +11,8 @@ from src.patches import Patches
 
 
 class Parser(object):
+    """Revanced Parser."""
+
     def __init__(self, patcher: Patches, config: RevancedConfig) -> None:
         self._PATCHES: List[str] = []
         self._EXCLUDED: List[str] = []
@@ -17,16 +20,34 @@ class Parser(object):
         self.config = config
 
     def include(self, name: str) -> None:
+        """Include a given patch.
+
+        :param name: Name of the patch
+        """
         self._PATCHES.extend(["-i", name])
 
     def exclude(self, name: str) -> None:
+        """Exclude a given patch.
+
+        :param name: Name of the patch to exclude
+        """
         self._PATCHES.extend(["-e", name])
         self._EXCLUDED.append(name)
 
     def get_excluded_patches(self) -> List[str]:
+        """
+        Getter to get all excluded patches
+        :return: List of excluded patches
+        """
         return self._EXCLUDED
 
     def patch_app(self, app: str, version: str, is_experimental: bool = False) -> None:
+        """Revanced APP Patcher.
+
+        :param app: Name of the app
+        :param version: Version of the application
+        :param is_experimental: Whether to enable experimental support
+        """
         logger.debug(f"Sending request to revanced cli for building {app} revanced")
         cli = self.config.normal_cli_jar
         patches = self.config.normal_patches_jar
diff --git a/src/patches.py b/src/patches.py
index e100d3f..1591fd5 100644
--- a/src/patches.py
+++ b/src/patches.py
@@ -1,3 +1,4 @@
+"""Revanced Patches."""
 import subprocess
 import sys
 from typing import Any, Dict, List, Tuple
@@ -9,7 +10,11 @@ from src.config import RevancedConfig
 
 
 class Patches(object):
-    def check_java(self) -> None:
+    """Revanced Patches."""
+
+    @staticmethod
+    def check_java() -> None:
+        """Check if Java17 is installed."""
         logger.debug("Checking if java is available")
         jd = subprocess.check_output(
             ["java", "-version"], stderr=subprocess.STDOUT
@@ -23,7 +28,9 @@ class Patches(object):
             exit(-1)
         logger.debug("Cool!! Java is available")
 
+    # noinspection DuplicatedCode
     def fetch_patches(self) -> None:
+        """Function to fetch all patches."""
         session = Session()
 
         logger.debug("fetching all patches")
@@ -93,6 +100,11 @@ class Patches(object):
         self.fetch_patches()
 
     def get(self, app: str) -> Tuple[List[Dict[str, str]], str]:
+        """Get all patches for the given app.
+
+        :param app: Name of the application
+        :return: Patches
+        """
         logger.debug("Getting patches for %s" % app)
         app_names = {
             "reddit": "_reddit",
@@ -118,6 +130,12 @@ class Patches(object):
     def include_and_exclude_patches(
         self, app: str, arg_parser: Any, app_patches: List[Dict[str, str]]
     ) -> None:
+        """Include and exclude patches for a given app.
+
+        :param app: Name of the app
+        :param arg_parser: Parser Obj
+        :param app_patches: All the patches of a given app
+        """
         logger.debug(f"Excluding patches for app {app}")
         if self.config.build_extended and app in self.config.extended_apps:
             excluded_patches = self.config.env.list(
@@ -136,6 +154,11 @@ class Patches(object):
             logger.debug(f"No excluded patches for {app}")
 
     def get_app_configs(self, app: str) -> Tuple[List[Dict[str, str]], str, bool]:
+        """Get Configurations for a given app.
+
+        :param app: Name of the application
+        :return: All Patches , Its version and whether it is experimental
+        """
         experiment = False
         total_patches, recommended_version = self.get(app=app)
         env_version = self.config.env.str(f"{app}_VERSION".upper(), None)
diff --git a/src/utils.py b/src/utils.py
index 1a18c0f..2509585 100644
--- a/src/utils.py
+++ b/src/utils.py
@@ -1,3 +1,4 @@
+"""Utilities."""
 supported_apps = [
     "youtube",
     "youtube_music",