diff --git a/cogs/userinfo.py b/cogs/userinfo.py
new file mode 100644
index 0000000..276e158
--- /dev/null
+++ b/cogs/userinfo.py
@@ -0,0 +1,86 @@
+import discord
+from discord.ext import commands
+from discord import app_commands
+from typing import Optional
+
+class UserInfoCog(commands.Cog):
+    def __init__(self, bot: commands.Bot):
+        self.bot = bot
+
+    @app_commands.command(name="aboutuser", description="Display info about a user or yourself.")
+    @app_commands.describe(user="The user to get info about (optional)")
+    async def aboutuser(self, interaction: discord.Interaction, user: Optional[discord.Member] = None):
+        member = user or interaction.user
+        # Fetch up-to-date member info
+        if interaction.guild:
+            member = interaction.guild.get_member(member.id) or member
+        # Fetch user object for banner/profile
+        user_obj = member._user if hasattr(member, '_user') else member
+        # Banner fetching (API call)
+        banner_url = None
+        try:
+            user_obj = await self.bot.fetch_user(member.id)
+            if user_obj.banner:
+                banner_url = user_obj.banner.url
+        except Exception:
+            pass
+        # Devices
+        if isinstance(member, discord.Member):
+            status = str(member.status).title()
+            devices = []
+            if hasattr(member, "devices"):
+                for dev in getattr(member, "devices", []):
+                    devices.append(str(dev).title())
+            else:
+                # Fallback for older discord.py
+                if member.desktop_status != discord.Status.offline:
+                    devices.append("Desktop")
+                if member.mobile_status != discord.Status.offline:
+                    devices.append("Mobile")
+                if member.web_status != discord.Status.offline:
+                    devices.append("Web")
+            device_str = ", ".join(devices) if devices else "Unknown"
+        else:
+            status = "Unknown"
+            device_str = "Unknown"
+        # Activities
+        activities = []
+        if hasattr(member, "activities"):
+            for activity in member.activities:
+                if isinstance(activity, discord.Game):
+                    activities.append(f"Playing {activity.name}")
+                elif isinstance(activity, discord.Spotify):
+                    activities.append(f"Listening to {activity.title} by {', '.join(activity.artists)}")
+                elif isinstance(activity, discord.Activity):
+                    activities.append(f"{activity.type.name.title()}: {activity.name}")
+        activity_str = ", ".join(activities) if activities else "None"
+        # Roles
+        if isinstance(member, discord.Member) and interaction.guild:
+            roles = [role.mention for role in member.roles if role != interaction.guild.default_role]
+            roles_str = ", ".join(roles) if roles else "None"
+        else:
+            roles_str = "None"
+        # Embed
+        embed = discord.Embed(
+            title=f"User Info: {member.display_name}",
+            color=member.color if hasattr(member, 'color') else discord.Color.blurple(),
+            description=f"Profile of {member.mention}"
+        )
+        if banner_url:
+            embed.set_image(url=banner_url)
+        embed.set_thumbnail(url=member.display_avatar.url)
+        embed.add_field(name="Nickname", value=member.nick or "None", inline=True)
+        embed.add_field(name="Username", value=f"{member.name}#{member.discriminator}", inline=True)
+        embed.add_field(name="User ID", value=member.id, inline=True)
+        embed.add_field(name="Status", value=status, inline=True)
+        embed.add_field(name="Device", value=device_str, inline=True)
+        embed.add_field(name="Activity", value=activity_str, inline=True)
+        embed.add_field(name="Roles", value=roles_str, inline=False)
+        embed.add_field(name="Account Created", value=member.created_at.strftime('%Y-%m-%d %H:%M:%S'), inline=True)
+        if hasattr(member, 'joined_at') and member.joined_at:
+            embed.add_field(name="Joined Server", value=member.joined_at.strftime('%Y-%m-%d %H:%M:%S'), inline=True)
+        embed.set_footer(text=f"Requested by {interaction.user.display_name}", icon_url=interaction.user.display_avatar.url)
+        await interaction.response.send_message(embed=embed)
+
+async def setup(bot: commands.Bot):
+    await bot.add_cog(UserInfoCog(bot))