diff --git a/src/sensorpajen/approve_sensors.py b/src/sensorpajen/approve_sensors.py
index 7ae61b9..a7370e3 100644
--- a/src/sensorpajen/approve_sensors.py
+++ b/src/sensorpajen/approve_sensors.py
@@ -8,6 +8,7 @@ Interactive tool to manage pending and ignored sensors.
 import sys
 import json
 import logging
+import argparse
 from pathlib import Path
 from typing import List
 
@@ -191,6 +192,9 @@ def process_sensors(sensors: List[DiscoveredSensor], manager: DiscoveryManager):
     print(f"\nFound {len(sensors)} sensor(s) to review")
     
     for i, sensor in enumerate(sensors, 1):
+        # Mark as reviewed when shown
+        manager.mark_reviewed(sensor.mac)
+        
         display_sensor(sensor, i, len(sensors))
         
         choice = get_user_choice()
@@ -209,6 +213,31 @@ def process_sensors(sensors: List[DiscoveredSensor], manager: DiscoveryManager):
 
 def main():
     """Main entry point for approve-sensors CLI."""
+    # Parse command line arguments
+    parser = argparse.ArgumentParser(
+        description="Approve or ignore discovered Bluetooth sensors",
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+        epilog="""
+Examples:
+  %(prog)s                    # Show only new pending sensors
+  %(prog)s --all             # Show all pending sensors (including reviewed)
+  %(prog)s --ignored         # Show only ignored sensors
+  %(prog)s --all --ignored   # Show all sensors
+        """
+    )
+    parser.add_argument(
+        '--all', '-a',
+        action='store_true',
+        help='Show all pending sensors, including previously reviewed ones'
+    )
+    parser.add_argument(
+        '--ignored', '-i',
+        action='store_true',
+        help='Show ignored sensors'
+    )
+    
+    args = parser.parse_args()
+    
     # Setup logging
     logging.basicConfig(
         level=logging.WARNING,
@@ -223,27 +252,38 @@ def main():
         # Load discovery manager
         manager = DiscoveryManager()
         
-        # Get pending and ignored sensors
-        pending = manager.get_pending()
-        ignored = manager.get_ignored()
+        # Get sensors based on flags
+        if args.all:
+            pending = manager.get_pending()
+            pending_label = "all pending"
+        else:
+            pending = manager.get_new_pending()
+            pending_label = "new pending"
+        
+        ignored = manager.get_ignored() if args.ignored else []
         
         if not pending and not ignored:
-            print("\n✅ No pending or ignored sensors found")
-            print("\nDiscovered sensors will appear here when detected.")
+            if args.all or args.ignored:
+                print(f"\n✅ No {pending_label if pending else 'ignored'} sensors found")
+            else:
+                print("\n✅ No new sensors to review")
+                all_pending = manager.get_pending()
+                if all_pending:
+                    print(f"\nThere are {len(all_pending)} previously reviewed pending sensor(s).")
+                    print("Run with --all to review them again.")
             return 0
         
-        # Process pending sensors first
+        # Process pending sensors
         if pending:
-            print(f"\n📋 Processing {len(pending)} pending sensor(s)...")
+            print(f"\n📋 Processing {len(pending)} {pending_label} sensor(s)...")
             process_sensors(pending, manager)
         
-        # Ask about ignored sensors
+        # Process ignored sensors if requested
         if ignored:
-            print(f"\n\nThere are {len(ignored)} ignored sensor(s).")
-            review = input("Review ignored sensors? [y/N]: ").strip().lower()
-            
-            if review == 'y':
-                process_sensors(ignored, manager)
+            if pending:
+                print("\n" + "=" * 70)
+            print(f"\n📋 Processing {len(ignored)} ignored sensor(s)...")
+            process_sensors(ignored, manager)
         
         print("\n" + "=" * 70)
         print("Done!")
diff --git a/src/sensorpajen/discovery_manager.py b/src/sensorpajen/discovery_manager.py
index ed8263b..27891dc 100644
--- a/src/sensorpajen/discovery_manager.py
+++ b/src/sensorpajen/discovery_manager.py
@@ -27,6 +27,7 @@ class DiscoveredSensor:
     last_seen: str
     sample_reading: Dict[str, float]
     status: str = "pending"  # pending, approved, ignored
+    reviewed: bool = False  # Has been shown in approval CLI
     ignored_at: Optional[str] = None
     ignore_reason: Optional[str] = None
 
@@ -195,10 +196,26 @@ class DiscoveryManager:
         """Get list of sensors with status 'pending'."""
         return [s for s in self.sensors.values() if s.status == "pending"]
     
+    def get_new_pending(self) -> List[DiscoveredSensor]:
+        """Get list of pending sensors that haven't been reviewed yet."""
+        return [s for s in self.sensors.values() if s.status == "pending" and not s.reviewed]
+    
     def get_ignored(self) -> List[DiscoveredSensor]:
         """Get list of sensors with status 'ignored'."""
         return [s for s in self.sensors.values() if s.status == "ignored"]
     
+    def mark_reviewed(self, mac: str):
+        """
+        Mark a sensor as reviewed (shown in approval CLI).
+        
+        Args:
+            mac: MAC address
+        """
+        mac = mac.upper()
+        if mac in self.sensors:
+            self.sensors[mac].reviewed = True
+            self.save()
+    
     def send_ntfy_notification(self, sensor: DiscoveredSensor):
         """
         Send ntfy notification for a newly discovered sensor.