diff --git a/app.py b/app.py
new file mode 100644
index 0000000..1850b83
--- /dev/null
+++ b/app.py
@@ -0,0 +1,92 @@
+from pathlib import Path
+from flask import Flask, render_template, request
+import subprocess
+import sys
+
+app = Flask(__name__)
+
+BASE_DIR = Path(__file__).parent
+
+
+@app.route("/")
+def index():
+    return render_template("index.html")
+
+
+@app.route("/run/balance", methods=["POST"])
+def run_balance():
+
+    result = subprocess.run(
+        [sys.executable, str(BASE_DIR / "balance.py")],
+        capture_output=True,
+        text=True
+    )
+
+    return render_template(
+        "result.html",
+        title="balance.py",
+        output=result.stdout + result.stderr
+    )
+
+
+@app.route("/run/transactions", methods=["POST"])
+def run_transactions():
+
+    year = request.form.get("year", "").strip()
+    week = request.form.get("week", "").strip()
+
+    command = [
+        sys.executable,
+        str(BASE_DIR / "transactions.py")
+    ]
+
+    if year and week:
+        command.extend([year, week])
+
+    result = subprocess.run(
+        command,
+        capture_output=True,
+        text=True
+    )
+
+    return render_template(
+        "result.html",
+        title="transactions.py",
+        output=result.stdout + result.stderr
+    )
+
+
+@app.route("/run/categorize", methods=["POST"])
+def run_categorize():
+
+    year = request.form.get("year", "").strip()
+    week = request.form.get("week", "").strip()
+
+    command = [
+        sys.executable,
+        str(BASE_DIR / "categorize_transactions.py")
+    ]
+
+    if year and week:
+        command.extend([year, week])
+
+    result = subprocess.run(
+        command,
+        capture_output=True,
+        text=True
+    )
+
+    return render_template(
+        "result.html",
+        title="categorize_transactions.py",
+        output=result.stdout + result.stderr
+    )
+
+
+if __name__ == "__main__":
+
+    app.run(
+        host="0.0.0.0",
+        port=5000,
+        debug=True
+    )
\ No newline at end of file
diff --git a/templates/index.html b/templates/index.html
new file mode 100644
index 0000000..1c1c49b
--- /dev/null
+++ b/templates/index.html
@@ -0,0 +1,66 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="utf-8">
+    <title>ING Auswertung</title>
+</head>
+<body>
+
+<h1>ING Auswertung</h1>
+
+<hr>
+
+<h2>Kontostand</h2>
+
+<form action="/run/balance" method="post">
+    <button type="submit">
+        balance.py starten
+    </button>
+</form>
+
+<hr>
+
+<h2>Transaktionen</h2>
+
+<form action="/run/transactions" method="post">
+
+    Jahr:
+    <input type="text"
+           name="year"
+           placeholder="2026">
+
+    KW:
+    <input type="text"
+           name="week"
+           placeholder="25">
+
+    <button type="submit">
+        transactions.py starten
+    </button>
+
+</form>
+
+<hr>
+
+<h2>Kategorisierung</h2>
+
+<form action="/run/categorize" method="post">
+
+    Jahr:
+    <input type="text"
+           name="year"
+           placeholder="2026">
+
+    KW:
+    <input type="text"
+           name="week"
+           placeholder="25">
+
+    <button type="submit">
+        categorize_transactions.py starten
+    </button>
+
+</form>
+
+</body>
+</html>
\ No newline at end of file
diff --git a/templates/result.html b/templates/result.html
new file mode 100644
index 0000000..2ef5845
--- /dev/null
+++ b/templates/result.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="utf-8">
+    <title>{{ title }}</title>
+</head>
+<body>
+
+<h1>{{ title }}</h1>
+
+<a href="/">Zurück</a>
+
+<hr>
+
+<pre>
+{{ output }}
+</pre>
+
+</body>
+</html>
\ No newline at end of file
