tandoor: added untare app usage

wiki/tandoor_recipes.md

@@ -7,3 +7,12 @@ shop lists.
 
 The software can be setup via [Docker](/wiki/docker.md) with the
 [vabene1111 image](/wiki/docker/vabene1111_-_recipes.md).
+
+## Usage
+
+Tandoor Recipes can be used as a web application.
+One possible app that is capable of connecting to a Tandoor Recipes server is Untare.
+It is available for [Android](/wiki/android.md)on the
+[Google Play Store](/wiki/android.md#app-store)
+[via this link](https://play.google.com/store/apps/details?id=unofficial.tandoor.recipes) and for
+iOS [via this link](https://apps.apple.com/de/app/untare/id6448643329).