Add info to OS

README.md

@@ -17,6 +17,7 @@
   - [General information](#general-information)
     - [Themes](#themes)
     - [Data and storage](#data-and-storage)
+    - [OS](#os)
   - [Burger menu](#burger-menu)
   - [Movements](#movements)
   - [All movement records](#all-movement-records)
@@ -47,6 +48,9 @@ There is a dark and a light theme, it is automatically adapted to the system the
 ### Data and storage
 The settings are saved as preferences and the data in the app folder. This means that the data is transferred to the new device with a backup/restore. Synchronization between multiple devices is currently not supported.
 
+### OS
+It is currently implemented for Android and published on the Play Store. Additional operating systems such as iOS or Windows deployments are also technically possible, but are not currently planned.
+
 ## Burger menu
 <img src="./.github/images/burger_menu_view.png" alt="Burger menu" style="width:250px;"/>