diff --git a/models/Habit.py b/models/Habit.py
index b462a5c..e2d46a5 100644
--- a/models/Habit.py
+++ b/models/Habit.py
@@ -2,16 +2,16 @@ import json
 from dataclasses import dataclass
 from datetime import datetime
 
-from models.HabitTrackings import HabitTrackings
-from db.SQLiteClient import update_slot, create_habit, get_habit, delete_habit, get_next_slot, \
-    get_habitTrackings_by_habit_id, get_slots, update_habit, get_habitList
+from models.HabitTracking import HabitTracking
+from db.SQLiteClient import (create_habit, get_habit, update_habit, delete_habit, get_next_slot, get_slots, update_slot,
+                             get_habitTrackings, get_habitList)
 
 
-# Unit wird als Integers wie folgt gemessen:
-# 0: Tag
-# 1: Woche (Default)
-# 2: Monat
-# 3: Jahr
+# unit will be represented by integers like this:
+# 0: day
+# 1: week (default)
+# 2: month
+# 3: year
 
 @dataclass
 class Habit:
@@ -28,83 +28,74 @@ class Habit:
         self.fill_statistics()
 
     @staticmethod
-    def create(list_id: int, name: str, times: int, note: str | None = None, unit: int | None = 1):
+    def create(list_id: int, name: str, times: int, note: str = None, unit: int = 1):
         slot = get_next_slot(list_id)
-        id = create_habit(list_id, name, times, unit, slot, note)
+        id = create_habit(list_id, name, note, times, unit, slot)
         return Habit(id, list_id, name, note, times, unit, slot)
 
     @staticmethod
     def get(id: int):
         habit = get_habit(id)
-        habit = Habit(habit[0], habit[1], habit[2], habit[3], habit[4], habit[5], habit[6]) if habit else None
+        return Habit(habit[0], habit[1], habit[2], habit[3], habit[4], habit[5], habit[6]) if habit else None
 
-        return habit
 
-    def update(self, name: str=None, note: str=None, times: int=None, unit: int=None):
-        update_habit(self.id, name, note, times, unit)
-        if name is not None:
-            self.name = name
-        if note is not None:
-            self.note = note
-        if times is not None:
-            self.times = times
-        if unit is not None:
-            self.unit = unit
+    # Updates: name, note, times, unit
+    def update(self):
+        update_habit(self.id, self.name, self.note, self.times, self.unit)
 
+
+    # Updates the slot and reorders the HabitList accordingly
     def update_slot(self, new_slot: int):
+        # Fetches a list with the following structure [(id, slot), (id, slot), ...]
         slots = get_slots(self.list_id)
-        if new_slot > self.slot:
-            slots = slots[self.slot:new_slot]
+
+        # Splits the list depending on whether the new slot is higher or lower than the current one
+        if new_slot > self.slot:                  # Example self.slot=1 new_slot=4
+            slots = slots[self.slot:new_slot]     # Expected list: [(id, 2), (id, 3), (id, 4)]
             for slot in slots:
                 update_slot(slot[0], slot[1]-1)
-        if new_slot < self.slot:
-            slots = slots[new_slot-1:self.slot-1]
+        if new_slot < self.slot:                  # Example self.slot=4 new_slot=1
+            slots = slots[new_slot-1:self.slot-1] # Expected list: [(id, 1), (id, 2), (id, 3)]
             for slot in slots:
                 update_slot(slot[0], slot[1]+1)
+
+        # Update the slot of the current habit
         update_slot(self.id, new_slot)
 
+
+    # Deletes the Habit
     def delete(self):
+        # Reorders the slots
         slots = get_slots(self.list_id)[self.slot+1:]
         for slot in slots:
             update_slot(slot[0], slot[1] - 1)
+
+        # Deletes all track-records associated with the Habit
+        trackings = self.get_habitTrackings()
+        for tracking in trackings:
+            tracking.delete()
+
+        # Deletes the current Habit
         delete_habit(self.id)
 
-    def get_habitTrackings(self) -> list[HabitTrackings]:
+
+    # Returns all track-records for a Habit
+    def get_habitTrackings(self) -> list:
         trackings = []
-        for rawTracking in get_habitTrackings_by_habit_id(self.id):
-            trackings.append(HabitTrackings(rawTracking[0], rawTracking[1],
+        for rawTracking in get_habitTrackings(self.id):
+            trackings.append(HabitTracking(rawTracking[0], rawTracking[1],
                                             datetime.strptime(rawTracking[2], "%Y-%m-%dT%H:%M:%S.%f")))
         return trackings
 
-    def getStreak(self):
-        streak = 0
-        trackings = []
-
-        for rawTracking in get_habitTrackings_by_habit_id(self.id):
-            trackings.append(HabitTrackings(datetime.strptime(rawTracking[2], "%Y-%m-%d")))
-
-        trackings.sort(reverse=True)
-        if current_date == tracking[0]:
-            streak += 1
-            for habitdate in trackings[1:]:
-                future_date = habitdate - relativedelta(day=1)
-                if future_date - habitdate == 0-0-1:
-                    streak + 1
-
-
-            future_date = habitdate - relativedelta(day=1)
-
-        for habitdate in trackings:
-            current_date = date.today()
-            if current_date == habitdate or current_date == habitdate - relativedelta(day=1):
-                streak += 1
-
-                future_date = habitdate - relativedelta(day=1)
-
-        return streak
 
+    # Returns the HabitList in which the Habit is located
+    def habit_list(self) -> list:
+        from models.HabitList import HabitList
+        raw_habitLists = get_habitList(self.list_id)
+        return HabitList(raw_habitLists[0], raw_habitLists[1], raw_habitLists[2]) if raw_habitLists else None
 
 
+    # Saves the progress of the Habit in the attribute percentage
     def fill_statistics(self):
         count = 0
         self.checked = False