diff --git a/docs/Formular.md b/docs/Formular.md
index bd80621..3bfe596 100644
--- a/docs/Formular.md
+++ b/docs/Formular.md
@@ -48,7 +48,7 @@ Daten werden nach der Berechnung als JSON-String gespeichert:
     "height": "180",
     "bmi": 23.1,
     "category": "Normalgewicht",
-    "timestamp": "2025-02-23T14:30:45.123Z"
+    "timestamp": "2025-02-23T14:30:45.123Z" // new Date().toISOString()
 }
 ```
 
diff --git a/src/barchart/script.js b/src/barchart/script.js
index 62c3f8d..23efb32 100644
--- a/src/barchart/script.js
+++ b/src/barchart/script.js
@@ -1,16 +1,5 @@
 const ctx = document.getElementById("bmiChart");
-
-/*
-  Height is profile data.
-  Later this can come from:
-  - localStorage
-  - backend API
-  - user profile page
-*/
-const USER_HEIGHT_CM = 170; // <-- change once, used everywhere
-const USER_HEIGHT_M = USER_HEIGHT_CM / 100;
-
-let bmiHistory = JSON.parse(localStorage.getItem("bmiHistory")) || [];
+const bmiData = JSON.parse(localStorage.getItem("bmiData")) || [];
 
 function getBMIColor(bmi) {
   if (bmi < 18.5) return "#74c0fc"; // Underweight
@@ -22,12 +11,12 @@ function getBMIColor(bmi) {
 const bmiChart = new Chart(ctx, {
   type: "bar",
   data: {
-    labels: bmiHistory.map((e) => e.date),
+    labels: bmiData?.map((e) => e.timestamp),
     datasets: [
       {
         label: "BMI",
-        data: bmiHistory.map((e) => e.bmi),
-        backgroundColor: bmiHistory.map((e) => getBMIColor(e.bmi)),
+        data: bmiData.map((e) => e.bmi),
+        backgroundColor: bmiData.map((e) => getBMIColor(e.bmi)),
         borderRadius: 6,
       },
     ],
@@ -54,31 +43,4 @@ const bmiChart = new Chart(ctx, {
       },
     },
   },
-});
-
-function addBMI() {
-  const weight = parseFloat(document.getElementById("weight").value);
-
-  if (!weight) {
-    alert("Please enter weight");
-    return;
-  }
-
-  const bmi = +(weight / (USER_HEIGHT_M * USER_HEIGHT_M)).toFixed(1);
-
-  const entry = {
-    date: new Date().toLocaleDateString(),
-    bmi,
-  };
-
-  bmiHistory.push(entry);
-
-  localStorage.setItem("bmiHistory", JSON.stringify(bmiHistory));
-
-  bmiChart.data.labels.push(entry.date);
-  bmiChart.data.datasets[0].data.push(entry.bmi);
-  bmiChart.data.datasets[0].backgroundColor.push(getBMIColor(entry.bmi));
-  bmiChart.update();
-
-  document.getElementById("weight").value = "";
-}
+});
\ No newline at end of file
diff --git a/src/formular/formular.js b/src/formular/formular.js
index c05c979..0b11826 100644
--- a/src/formular/formular.js
+++ b/src/formular/formular.js
@@ -81,9 +81,9 @@ function saveToLocalStorage(age, date, weight, height, bmi, category) {
     timestamp: new Date().toISOString(),
   };
 
-  let bmiHistory = JSON.parse(localStorage.getItem("bmiData") || "[]");
-  bmiHistory.push(newdata);
-  localStorage.setItem("bmiData", JSON.stringify(bmiHistory));
+  let bmiData = JSON.parse(localStorage.getItem("bmiData") || "[]");
+  bmiData.push(newdata);
+  localStorage.setItem("bmiData", JSON.stringify(bmiData));
 }
 
 
diff --git a/src/app.html b/src/index.html
similarity index 100%
rename from src/app.html
rename to src/index.html