diff --git a/apps/calculator/index.html b/apps/calculator/index.html
new file mode 100644
index 0000000..00a8fec
--- /dev/null
+++ b/apps/calculator/index.html
@@ -0,0 +1,119 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>MilkNet | Calculator</title>
+    <style>
+        @import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&display=swap');
+        body {
+            font-family: 'DM Sans', sans-serif;
+            display: flex;
+            justify-content: center;
+            align-items: center;
+            height: 100vh;
+            background-color: #000;
+        }
+        .calculator {
+            background: #111;
+            color: #fff;
+            padding: 20px;
+            border-radius: 15px;
+            box-shadow: 0px 4px 15px rgba(255, 255, 255, 0.2);
+            text-align: center;
+        }
+        input {
+            width: 100%;
+            height: 60px;
+            text-align: center;
+            font-size: 2em;
+            margin-bottom: 15px;
+            background: #222;
+            color: #fff;
+            border: none;
+            padding: 10px;
+            border-radius: 8px;
+        }
+        .buttons {
+            display: grid;
+            grid-template-columns: repeat(5, 1fr);
+            gap: 10px;
+        }
+        button {
+            padding: 20px;
+            font-size: 1.3em;
+            font-weight: 500;
+            border: none;
+            background: #333;
+            color: #fff;
+            cursor: pointer;
+            border-radius: 8px;
+            transition: background 0.3s ease;
+        }
+        button:hover {
+            background: #555;
+        }
+    </style>
+</head>
+<body>
+    <div class="calculator">
+        <input type="text" id="display" disabled>
+        <div class="buttons">
+            <button onclick="clearDisplay()">C</button>
+            <button onclick="appendToDisplay('(')">(</button>
+            <button onclick="appendToDisplay(')')">)</button>
+            <button onclick="appendToDisplay(' / ')">/</button>
+            <button onclick="appendToDisplay(' * ')">*</button>
+            <button onclick="appendToDisplay('7')">7</button>
+            <button onclick="appendToDisplay('8')">8</button>
+            <button onclick="appendToDisplay('9')">9</button>
+            <button onclick="appendToDisplay(' - ')">-</button>
+            <button onclick="appendToDisplay(' + ')">+</button>
+            <button onclick="appendToDisplay('4')">4</button>
+            <button onclick="appendToDisplay('5')">5</button>
+            <button onclick="appendToDisplay('6')">6</button>
+            <button onclick="appendToDisplay('%')">%</button>
+            <button onclick="appendToDisplay('1')">1</button>
+            <button onclick="appendToDisplay('2')">2</button>
+            <button onclick="appendToDisplay('3')">3</button>
+            <button onclick="appendToDisplay('0')">0</button>
+            <button onclick="appendToDisplay('.')">.</button>
+            <button onclick="appendToDisplay('sin(')">sin</button>
+            <button onclick="appendToDisplay('cos(')">cos</button>
+            <button onclick="appendToDisplay('tan(')">tan</button>
+            <button onclick="appendToDisplay('log(')">log</button>
+            <button onclick="appendToDisplay('√(')">√</button>
+            <button onclick="appendToDisplay('^')">x^y</button>
+            <button onclick="appendToDisplay('π')">π</button>
+            <button onclick="appendToDisplay('e')">e</button>
+            <button onclick="appendToDisplay('!')">x!</button>
+            <button onclick="calculateResult()">=</button>
+        </div>
+    </div>
+    <script>
+        function appendToDisplay(value) {
+            document.getElementById('display').value += value;
+        }
+        function clearDisplay() {
+            document.getElementById('display').value = '';
+        }
+        function calculateResult() {
+            try {
+                let expression = document.getElementById('display').value;
+                expression = expression.replace(/factorial\((\d+)\)/g, (match, num) => factorial(parseInt(num)));
+                document.getElementById('display').value = eval(expression);
+            } catch (e) {
+                alert('Invalid Expression');
+            }
+        }
+        function factorial(n) {
+            if (n === 0 || n === 1) return 1;
+            let result = 1;
+            for (let i = 2; i <= n; i++) {
+                result *= i;
+            }
+            return result;
+        }
+    </script>
+</body>
+</html>
