diff --git a/app/.gitignore b/app/.gitignore
new file mode 100644
index 0000000..b0c602a
--- /dev/null
+++ b/app/.gitignore
@@ -0,0 +1,163 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+*.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+# Flet
+storage/
\ No newline at end of file
diff --git a/app/README.md b/app/README.md
new file mode 100644
index 0000000..f56eb25
--- /dev/null
+++ b/app/README.md
@@ -0,0 +1,23 @@
+# Flet app
+
+Flet app using Flet extension.
+
+To run the app:
+
+1. Install dependencies from pyproject.toml:
+
+```
+poetry install
+```
+
+2. Build app:
+
+```
+poetry run flet build macos -v
+```
+
+3. Run app:
+
+```
+poetry run flet run
+```
\ No newline at end of file
diff --git a/app/pyproject.toml b/app/pyproject.toml
new file mode 100644
index 0000000..61bda5f
--- /dev/null
+++ b/app/pyproject.toml
@@ -0,0 +1,41 @@
+[project]
+name = "songsheet_generator"
+version = "0.1.0"
+description = ""
+readme = "README.md"
+requires-python = ">=3.9"
+authors = [
+    { name = "Leopold Fajtak", email = "leopold@fajtak.at" }
+]
+dependencies = [
+  "flet==0.26.0"
+]
+
+[tool.flet]
+# org name in reverse domain name notation, e.g. "com.mycompany".
+# Combined with project.name to build bundle ID for iOS and Android apps
+org = "at.fajtak.songsheet_generator"
+
+# project display name that is used as an app title on Android and iOS home screens,
+# shown in window titles and about app dialogs on desktop.
+product = "Songsheet Generator"
+
+# company name to display in about app dialogs
+company = "Leopold Fajtak"
+
+# copyright text to display in about app dialogs
+copyright = "Copyright (C) 2025 by Leopold Fajtak"
+
+[tool.flet.app]
+path = "src/songsheet_generator"
+
+[tool.uv]
+dev-dependencies = [
+    "flet[all]==0.26.0",
+]
+
+[tool.poetry]
+package-mode = false
+
+[tool.poetry.group.dev.dependencies]
+flet = {extras = ["all"], version = "0.26.0"}
\ No newline at end of file
diff --git a/app/requirements.txt b/app/requirements.txt
new file mode 100644
index 0000000..c230cff
--- /dev/null
+++ b/app/requirements.txt
@@ -0,0 +1,2 @@
+flet[all]
+dependency_injector
\ No newline at end of file
diff --git a/app/src/songsheet_generator/components/assets/icon.png b/app/src/songsheet_generator/components/assets/icon.png
new file mode 100644
index 0000000..bebc6d5
Binary files /dev/null and b/app/src/songsheet_generator/components/assets/icon.png differ
diff --git a/app/src/songsheet_generator/components/config_component.py b/app/src/songsheet_generator/components/config_component.py
new file mode 100644
index 0000000..a9add84
--- /dev/null
+++ b/app/src/songsheet_generator/components/config_component.py
@@ -0,0 +1,24 @@
+
+import flet as ft
+from pathlib import PurePath
+from songsheet_generator.service.config_service import ConfigService
+
+class ConfigComponent(ft.Column):
+    # application's root control is a Column containing all other controls
+    def __init__(self, config_service: ConfigService):
+        super().__init__()
+        self.config_service = config_service
+        self.path = ft.TextField(label="Bibliothek Pfad", value = self.config_service.library_path, on_change=self.textbox_changed)
+        self.width = 600
+        self.controls = [
+            self.path,
+            ft.ElevatedButton(text="Save config", on_click=self.save_config)
+        ]
+        
+    def textbox_changed(self, e):
+        self.config_service.library_path = e.control.value
+
+    def save_config(self, e):
+        self.config_service.save_config_to_storage()
+            
+
diff --git a/app/src/songsheet_generator/components/song_component.py b/app/src/songsheet_generator/components/song_component.py
new file mode 100644
index 0000000..1c45753
--- /dev/null
+++ b/app/src/songsheet_generator/components/song_component.py
@@ -0,0 +1,91 @@
+import flet as ft
+from songsheet_generator.types.song_purpose import SongPurpose
+from songsheet_generator.types.song import Song
+from songsheet_generator.service.song_service import SongService
+from pathlib import Path
+
+class SongComponent(ft.Column):
+    
+    def __init__(self,
+                 song_service: SongService,
+                 song_delete = lambda a : None,
+                 song: Song = Song(),
+                 ):
+        super().__init__()
+        self.song_service = song_service
+        self.song = song
+        self.delete = song_delete
+        self.display_song = ft.Row(spacing=0, controls=[
+            ft.Text(self.song.purpose.display_name, weight=ft.FontWeight.BOLD),
+            ft.Text(self.song.path),
+            ])
+        self.edit_purpose = ft.Dropdown(
+            label = "Messteil",
+            hint_text="Teil der Messe, der gesungen wird",
+            options=[ ft.dropdown.Option(key=purpose.key, text=purpose.display_name) for purpose in SongPurpose.get_all_purposes() ],
+            autofocus=True,
+        )
+        self.edit_path = ft.Dropdown(
+            label="Pfad",
+            options = [ft.dropdown.Option(key=path) for path in self.song_service.all_songs()]
+        )
+
+        self.edit_name = ft.TextField(expand=1)
+
+        self.display_view = ft.Row(
+            alignment=ft.MainAxisAlignment.SPACE_BETWEEN,
+            vertical_alignment=ft.CrossAxisAlignment.CENTER,
+            controls=[
+                self.display_song,
+                ft.Row(
+                    spacing=0,
+                    controls=[
+                        ft.IconButton(
+                            icon=ft.Icons.CREATE_OUTLINED,
+                            tooltip="Lied bearbeiten",
+                            on_click=self.edit_clicked,
+                        ),
+                        ft.IconButton(
+                            ft.Icons.DELETE_OUTLINE,
+                            tooltip="Lied entfernen",
+                            on_click=self.delete_clicked,
+                        ),
+                    ],
+                ),
+            ],
+        )
+        
+        self.edit_view = ft.Row(
+            visible=False,
+            alignment=ft.MainAxisAlignment.SPACE_BETWEEN,
+            vertical_alignment=ft.CrossAxisAlignment.CENTER,
+            controls=[
+                self.edit_purpose,
+                self.edit_path,
+                ft.IconButton(
+                    icon=ft.Icons.DONE_OUTLINE_OUTLINED,
+                    icon_color=ft.Colors.GREEN,
+                    tooltip="Update Song",
+                    on_click=self.save_clicked,
+                ),
+            ],
+        )
+        self.controls = [self.display_view, self.edit_view]
+
+    def edit_clicked(self, e):
+        self.edit_purpose.value = self.song.purpose.key
+        self.edit_path.value = self.song.path
+        self.display_view.visible = False
+        self.edit_view.visible = True
+        self.update()
+
+    def save_clicked(self, e):
+        self.song.purpose = SongPurpose(self.edit_purpose.value)
+        self.display_song.controls[0].value = self.song.purpose.display_name
+        self.display_song.controls[1].value = Path(self.song.path)
+        self.display_view.visible = True
+        self.edit_view.visible = False
+        self.update()
+
+    def delete_clicked(self, e):
+        self.delete(self)
\ No newline at end of file
diff --git a/app/src/songsheet_generator/components/songs_component.py b/app/src/songsheet_generator/components/songs_component.py
new file mode 100644
index 0000000..4f75312
--- /dev/null
+++ b/app/src/songsheet_generator/components/songs_component.py
@@ -0,0 +1,47 @@
+
+import flet as ft
+from pathlib import Path
+from .song_component import SongComponent
+from songsheet_generator.types.song_purpose import SongPurpose
+from songsheet_generator.types.song import Song
+from songsheet_generator.service.song_service import SongService
+from songsheet_generator.containers import Services
+
+class SongsComponent(ft.Column):
+    # application's root control is a Column containing all other controls
+    def __init__(self, song_service: SongService):
+        super().__init__()
+        self.song_service = song_service
+        self.songs = ft.Column()
+        self.purpose = ft.Dropdown(
+            label = "Messteil",
+            hint_text="Teil der Messe, der gesungen wird",
+            options=[ ft.dropdown.Option(key=purpose.key, text=purpose.display_name) for purpose in SongPurpose.get_all_purposes() ],
+            autofocus=True,
+        )
+        self.path = ft.Dropdown(
+            label="Pfad",
+            options = [ft.dropdown.Option(key=path) for path in self.song_service.all_songs()]
+        )
+        self.width = 600
+        self.controls = [
+            ft.Row(
+                controls=[
+                    self.purpose,
+                    self.path,
+                    ft.FloatingActionButton(
+                        icon=ft.Icons.ADD, on_click=self.add_clicked
+                    ),
+                ],
+            ),
+            self.songs,
+        ]
+
+    def add_clicked(self, s):
+        # todo use dependency injection and the factory design pattern
+        self.songs.controls.append(SongComponent(song_service = self.song_service, song_delete = self.song_delete, song = Song(SongPurpose(self.purpose.value), Path(self.path.value))))
+        self.update()
+
+    def song_delete(self, song):
+        self.songs.controls.remove(song)
+        self.update()
diff --git a/app/src/songsheet_generator/containers.py b/app/src/songsheet_generator/containers.py
new file mode 100644
index 0000000..d0b3dda
--- /dev/null
+++ b/app/src/songsheet_generator/containers.py
@@ -0,0 +1,16 @@
+"""Containers module"""
+
+from dependency_injector import containers, providers
+from service.config_service_impl import ConfigServiceImpl
+from service.song_service_impl import SongServiceImpl
+from components.song_component import SongComponent
+
+class Services(containers.DeclarativeContainer):
+    config_service = providers.Singleton(ConfigServiceImpl)
+    song_service = providers.Singleton(SongServiceImpl, config_service = config_service)
+    song_component_factory = providers.Factory(SongComponent, song_service=song_service)
+
+class Application(containers.DeclarativeContainer):
+    services = providers.Container(
+        Services
+    )
\ No newline at end of file
diff --git a/app/src/songsheet_generator/main.py b/app/src/songsheet_generator/main.py
new file mode 100644
index 0000000..bf1d8bc
--- /dev/null
+++ b/app/src/songsheet_generator/main.py
@@ -0,0 +1,48 @@
+import flet as ft
+from dependency_injector.wiring import Provide, inject
+from components.songs_component import SongsComponent
+from components.config_component import ConfigComponent
+from service.config_service import ConfigService
+from service.song_service import SongService
+from songsheet_generator.containers import Application
+
+def main(
+    page: ft.Page,
+    song_service: SongService = Provide[Application.services.song_service],
+    config_service: ConfigService = Provide[Application.services.config_service]):
+
+    page.title = "Songsheet Generator"
+    page.horizontal_alignment = ft.CrossAxisAlignment.CENTER
+    page.update()
+    
+    config_service.set_page(page)
+    
+    lieder = SongsComponent(song_service)
+    config = ConfigComponent(config_service)
+    
+    tabs = ft.Tabs(
+        selected_index=1,
+        animation_duration=300,
+        tabs = [
+            ft.Tab(
+                text="Lieder",
+                content=lieder,
+            ),
+            ft.Tab(
+                text="Events",
+                content=ft.Text("Events"),
+            ),
+            ft.Tab(
+                text="Config",
+                content=config,
+            )
+        ]
+    )
+     
+    #add application's root control to the page
+    page.add(tabs)
+
+
+container1 = Application()
+container1.wire(modules=[__name__])
+ft.app(main)
diff --git a/app/src/songsheet_generator/service/config_service.py b/app/src/songsheet_generator/service/config_service.py
new file mode 100644
index 0000000..d0b7b86
--- /dev/null
+++ b/app/src/songsheet_generator/service/config_service.py
@@ -0,0 +1,17 @@
+import flet as ft
+from abc import ABC, abstractmethod
+from pathlib import Path
+
+class ConfigService(ABC):
+    @property
+    @abstractmethod
+    def library_path(self) -> Path:
+        pass
+    
+    @abstractmethod
+    def set_page(self, page: ft.Page):
+        pass
+    
+    @abstractmethod
+    def save_config_to_storage(self):
+        pass
\ No newline at end of file
diff --git a/app/src/songsheet_generator/service/config_service_impl.py b/app/src/songsheet_generator/service/config_service_impl.py
new file mode 100644
index 0000000..c5c5ae7
--- /dev/null
+++ b/app/src/songsheet_generator/service/config_service_impl.py
@@ -0,0 +1,26 @@
+import flet as ft
+from .config_service import ConfigService
+from pathlib import Path
+
+class ConfigServiceImpl(ConfigService):
+
+    def __init__(self):
+        self.library_path: Path = Path.home()
+        self.page = None
+        
+    def set_page(self, page: ft.Page):
+        self.page = page
+        if self.page.client_storage.contains_key("library_path"):
+            self.library_path = Path(self.page.client_storage.get("library_path"))
+
+    @property
+    def library_path(self) -> Path:
+        return self._library_path
+    
+    @library_path.setter
+    def library_path(self, value: Path):
+        self._library_path = value
+        
+    def save_config_to_storage(self):
+        if self.page:
+            self.page.client_storage.set("library_path", self.library_path)
\ No newline at end of file
diff --git a/app/src/songsheet_generator/service/library.py b/app/src/songsheet_generator/service/library.py
new file mode 100644
index 0000000..f2324fc
--- /dev/null
+++ b/app/src/songsheet_generator/service/library.py
@@ -0,0 +1,2 @@
+class Library():
+    def __init__(self):
diff --git a/app/src/songsheet_generator/service/song_service.py b/app/src/songsheet_generator/service/song_service.py
new file mode 100644
index 0000000..5a0a58a
--- /dev/null
+++ b/app/src/songsheet_generator/service/song_service.py
@@ -0,0 +1,8 @@
+from abc import ABC, abstractmethod
+
+class SongService(ABC):
+
+    @abstractmethod
+    def all_songs():
+        pass
+    
\ No newline at end of file
diff --git a/app/src/songsheet_generator/service/song_service_impl.py b/app/src/songsheet_generator/service/song_service_impl.py
new file mode 100644
index 0000000..5e8655f
--- /dev/null
+++ b/app/src/songsheet_generator/service/song_service_impl.py
@@ -0,0 +1,12 @@
+from .config_service import ConfigService
+from .song_service import SongService
+
+class SongServiceImpl(SongService):
+
+    def __init__(self, config_service: ConfigService):
+        self.config_service = config_service
+
+    def all_songs(self):
+        assignments_paths = list(self.config_service.library_path.rglob('assignments.tt'))
+        return [ p.parent.relative_to(self.config_service.library_path) for p in assignments_paths ]
+        
\ No newline at end of file
diff --git a/app/src/songsheet_generator/types/song.py b/app/src/songsheet_generator/types/song.py
new file mode 100644
index 0000000..2ea8470
--- /dev/null
+++ b/app/src/songsheet_generator/types/song.py
@@ -0,0 +1,9 @@
+from pathlib import PurePath
+from .song_purpose import SongPurpose
+
+class Song():
+    def __init__(self,
+                 purpose: SongPurpose = SongPurpose(),
+                 path: PurePath = PurePath(),):
+        self.purpose = purpose
+        self.path = path
diff --git a/app/src/songsheet_generator/types/song_purpose.py b/app/src/songsheet_generator/types/song_purpose.py
new file mode 100644
index 0000000..12ac27a
--- /dev/null
+++ b/app/src/songsheet_generator/types/song_purpose.py
@@ -0,0 +1,27 @@
+class SongPurpose():
+    all_purposes = {
+        "introitus": ["Eröffnung", "Eröffnung"],
+        "kyrie": ["Kyrie", "Kyrie"],
+        "gloria": ["Gloria", "Gloria"],
+        "kehrvers": ["Antwortpsalm-Kehrvers", "Antwortpsalm-Kehrvers"],
+        "graduale": ["Graduale", "Graduale"],
+        "ad_evangelium": ["Ruf vor dem Evangelium/der Passion", "Ruf vor dem Evangelium/der Passion"],
+        "credo": ["Glaubensbekenntnis", "Glaubensbekenntnis"],
+        "offertorium": ["Zur Gabenbereitung", "Zur Gabenbereitung"],
+        "sanctus": ["Sanctus", "Sanctus"],
+        "agnus": ["Agnus Dei", "Agnus Dei"],
+        "communio": ["Zur Kommunion", "Zur Kommunion"],
+        "BMV": ["Marianische Antiphon", "Marianische Antiphon"],
+        "": ["", "Leer"]
+    }
+
+    def __init__(self, key=""):
+        self.key = key
+        try:
+            [self.print_name, self.display_name] = self.all_purposes.get(key)
+        except KeyError:
+            printf(f"{key} is not a purpose option.")
+    
+    @classmethod
+    def get_all_purposes(cls):
+        return [cls(key) for key in cls.all_purposes.keys()]
\ No newline at end of file
diff --git a/templates/purpose_processing.tt b/templates/purpose_processing.tt
index 8853b03..318a7bf 100644
--- a/templates/purpose_processing.tt
+++ b/templates/purpose_processing.tt
@@ -7,9 +7,13 @@
         purpose_print = purpose_print ? purpose_print : 'Kyrie';
     ELSIF purpose == 'gloria';
         purpose_print = purpose_print ? purpose_print : 'Gloria';
-    ELSIF purpose == 'graduale';
+    ELSIF purpose == 'kehrvers';
         purpose_print = 'Antwortpsalm-Kehrvers';
+    ELSIF purpose == 'graduale';
+        purpose_print = 'Graduale';
     ELSIF purpose == 'tractus';
+        purpose_print = 'Traktus';
+    ELSIF purpose == 'ad_evangelium';
         purpose_print = passion ? 'Ruf vor der Passion' : lent ? 'Ruf vor dem Evangelium' : 'Halleluja';
     ELSIF purpose == 'credo';
         purpose_print = 'Glaubensbekenntnis';