diff --git a/src/ui/android/assets/help_content.html b/src/ui/android/assets/help_content.html
index 00f74f2ef..45281ce2d 100644
--- a/src/ui/android/assets/help_content.html
+++ b/src/ui/android/assets/help_content.html
@@ -1,6 +1,29 @@
 <html>
-	<body>
+<body>
 
+<p>
+<b>Speech input</b>: Press microphone icon and talk.
+<br>
+<b>Text input</b>: Select "keyboard" from menu, press keyboard icon.
+<br>
+<b>Correction</b>: Press input text.
+<br>
+<b>Alternatives</b>: Press output text
+<br>
+<b>Grammar info</b>: Press any of alternatives.
+<br>
+<b>Confidence</b>: colour of output text
+<ul>
+<li><span style="background-color:palegreen">Green</span>: Probably correct (but not the only one)</li>
+<li><span style="background-color:yellow">Yellow</span>: May be correct</li>
+<li><span style="background-color:pink">Light red</span>: Rough, probably incorrect</li>
+<li><span style="background-color:red">Dark red</span>: If all else fails, usually incorrect</li>
+</ul>
+</p>
+
+<hr>
+
+<h2>More details</h2>
 <p>
 The Human Language Compiler is a translator for human language based on
 programming language technology: grammars and semantics. Therefore it is compact in size
