diff --git a/Cleanup.py b/Cleanup.py
index 94f8aaf..2fc6484 100644
--- a/Cleanup.py
+++ b/Cleanup.py
@@ -1,10 +1,12 @@
 import os
 import sys
 from Notifications import send_notif
+import time
 
 # Move apps to proper location
 def move_apps(appstate):
     build_config = appstate['build_config']
+    print = appstate['logger'].info
 
     try:
         os.mkdir('archive')
@@ -24,20 +26,33 @@ def move_apps(appstate):
             # sys.exit('There was an error moving the final apk files!')
         
         # Do some cleanup, keep only the last 3 build's worth of files and a week worth of logs
-        files = []
-        dir = os.scandir('archive')
-        for f in dir:
-            if name in f.name:
-                files.append(f)
-        files.sort(key=lambda f: f.stat().st_ctime)
-        files.reverse()
-        for f in files[3:]:
-            os.remove(f)
-            print('Deleted old build '+f.name)
-        dir.close()
+        with os.scandir('archive') as dir:
+            files = []
+            for f in dir:
+                if name in f.name:
+                    files.append(f)
+            files.sort(key=lambda f: f.stat().st_ctime)
+            files.reverse()
+            for f in files[3:]:
+                os.remove(f)
+                print('Deleted old build '+f.name)
+
+        # Delete logs older than 7 days
+        with os.scandir('logs') as dir:
+            now = time.now()
+            for f in dir:
+                if f.stat().st_ctime < now - 7 * 86400:
+                    os.remove(f)
 
 def clean_exit(msg, appstate, code=1):
-    send_notif(appstate, error=True)
+    print = appstate['logger'].info
+
+    try:
+        appstate['notification_config']
+        send_notif(appstate, error=True)
+    except:
+        pass
+    
     if msg:
-        print(msg, file=sys.stderr)
+        print(msg)
     exit(code)
\ No newline at end of file
diff --git a/JAVABuilder.py b/JAVABuilder.py
index 6a6796a..84456e4 100644
--- a/JAVABuilder.py
+++ b/JAVABuilder.py
@@ -2,13 +2,14 @@ import os
 import sys
 import configparser as cp
 import json
-import subprocess
 from Cleanup import clean_exit
+import subprocess
 
 # Build the revanced apps
 def build_apps(appstate):
     build_config = appstate['build_config']
     flag = appstate['flag']
+    print = appstate['logger'].info
 
     chosen_patches = cp.ConfigParser()
     chosen_patches.read('chosen_patches.toml')
@@ -69,9 +70,13 @@ def build_apps(appstate):
             print(f"Building {pretty_name} (nonroot)...")
         
         try:
-            output = subprocess.run(cmd, shell=True)
+            with subprocess.Popen(cmd, shell=True, bufsize=0, stdout=subprocess.PIPE, stderr=subprocess.STDOUT).stdout as output:
+                for line in output:
+                    line_utf = line.decode('utf-8').strip('\n')
+                    if line_utf:
+                        print(line_utf)
         except Exception as e:
-            clean_exit(f"There was an error while building {pretty_name}!", appstate)
+            clean_exit(f"There was an error while building {pretty_name}!\n{e}", appstate)
         
         try:
             os.rename(output_name+'.apk', output_name+'.apk') # TODO: Add timestamp here
diff --git a/Notifications.py b/Notifications.py
index 5d1c7d7..dfee15b 100644
--- a/Notifications.py
+++ b/Notifications.py
@@ -4,7 +4,9 @@ import requests as req
 import subprocess
 
 def send_notif(appstate, error=False):
+    print = appstate['logger'].info
     timestamp = appstate['timestamp']
+
     if error:
         msg = f"There was an error during build! Please check the logs.\nTimestamp: {timestamp}"
     else:
@@ -72,9 +74,13 @@ def send_notif(appstate, error=False):
                     continue
                 cmd = f"./telegram.sh -t {token} -c {chat} -T {encoded_title} -M \"{msg}\""
                 try:
-                    subprocess.run(cmd, shell=True)
+                    with subprocess.Popen(cmd, shell=True, bufsize=0, stdout=subprocess.PIPE, stderr=subprocess.STDOUT).stdout as output:
+                        for line in output:
+                            line_utf = line.decode('utf-8').strip('\n')
+                            if line_utf:
+                                print(line_utf)
                 except Exception as e:
-                    print('Failed!' + str(e))
+                    clean_exit(f"Failed!\n{e}", appstate)
 
             case _:
                 print('Don\'t know how to send notifications to ' + entry)
diff --git a/ReVancedBuilder.py b/ReVancedBuilder.py
index c3ad1f9..e4d5e96 100755
--- a/ReVancedBuilder.py
+++ b/ReVancedBuilder.py
@@ -11,9 +11,8 @@ from JAVABuilder import *
 from datetime import datetime
 from Notifications import send_notif
 from Cleanup import *
+import logging
 
-# TODO: Logging
-# TODO: Notifications
 # TODO: Run post_script (preferably in any language)
 # TODO: README
 # TODO: PATCHES_GUIDE.md (maybe delete it?)
@@ -85,10 +84,8 @@ appstate = {}
 # Get a timestamp
 time = datetime.now()
 appstate['timestamp'] = time.strftime('%Y%m%d%H%M%S')
-print(f"Started building ReVanced apps at {time.strftime('%d %B, %Y %H:%M:%S')}")
-print('----------------------------------------------------------------------')
 
-# Read configs
+# Read arguments
 try:
     os.chdir(sys.argv[1])
 except IndexError:
@@ -96,14 +93,34 @@ except IndexError:
 except FileNotFoundError:
     clean_exit('Invalid working directory provided!', appstate)
 
+# Set up logging
+try:
+    os.mkdir('logs')
+except FileExistsError:
+    pass
+
+logging.basicConfig(level=logging.INFO, format='%(message)s')
+logger = logging.getLogger()
+logger.addHandler(logging.FileHandler(f"logs/{appstate['timestamp']}.log", 'w'))
+print = logger.info
+appstate['logger'] = logger
+
+# Get the flag
 try:
     flag = sys.argv[2]
 except:
     flag = None
 
+if flag not in ['buildonly', 'checkonly', 'force', 'experimental']:
+        clean_exit(f"Unknown flag: {flag}", appstate)
+
 appstate['flag'] = flag
 appstate['microg_updated'] = False
 
+print(f"Started building ReVanced apps at {time.strftime('%d %B, %Y %H:%M:%S')}")
+print('----------------------------------------------------------------------')
+
+# Read configs
 try:
     appstate['build_config']=cp.ConfigParser()
     appstate['build_config'].read_file(open('build_config.toml', 'r'))