Add some more info about the app to README

README.md

@@ -2,6 +2,12 @@
 
 An application for Android to teach morse code using the Koch method.
 
+The Koch method introduces morse symbols one lesson at a time, allowing you to master each symbol before adding a new one. This pace makes it much easier to train your ear to recognise the symbols without becoming overwhelmed.
+
+Also contains a sounder, allowing you to listen to whatever text you wish to send.
+
+For screenshots, check out the store pages below.
+
 [<img src="https://fdroid.gitlab.io/artwork/badge/get-it-on.png"
      alt="Get it on F-Droid"
      height="80">](https://f-droid.org/packages/es.eoinrul.ecwt/)