diff --git a/MOBILE/template.pom b/MOBILE/template.pom
index 086196b..cc116f4 100644
--- a/MOBILE/template.pom
+++ b/MOBILE/template.pom
@@ -2,13 +2,16 @@
 <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <modelVersion>4.0.0</modelVersion>
+
   <groupId>org.ooni</groupId>
   <artifactId>oonimkall</artifactId>
   <version>@VERSION@</version>
   <packaging>aar</packaging>
+
   <name>oonimkall</name>
-  <description>OONI Probe Engine for Android</description>
-  <url>https://github.com/ooni/probe-engine</url>
+  <description>OONI Probe for Android</description>
+  <url>https://github.com/ooni/probe-cli</url>
+
   <licenses>
     <license>
       <name>The 3-Clause BSD License</name>
@@ -16,18 +19,21 @@
       <distribution>repo</distribution>
     </license>
   </licenses>
+
   <scm>
     <url>https://github.com/ooni/probe-engine</url>
     <connection>https://github.com/ooni/probe-engine.git</connection>
   </scm>
+
   <developers>
     <developer>
       <name>Simone Basso</name>
       <email>simone@openobservatory.org</email>
       <roles>
-        <role>developer</role>
+        <role>Core developer</role>
       </roles>
       <timezone>Europe/Rome</timezone>
     </developer>
   </developers>
+
 </project>
diff --git a/build-android.bash b/build-android.bash
index 161edb7..afef66f 100755
--- a/build-android.bash
+++ b/build-android.bash
@@ -2,7 +2,7 @@
 set -e
 if [ -z "$ANDROID_HOME" -o "$1" = "--help" ]; then
     echo ""
-    echo "usage: $0"
+    echo "usage: $0 [--sign]"
     echo ""
     echo "Please set ANDROID_HOME. We assume you have installed"
     echo "the Android SDK. You can do that on macOS using:"
@@ -27,5 +27,16 @@ set -x
 export PATH=$(go env GOPATH)/bin:$PATH
 go get -u golang.org/x/mobile/cmd/gomobile
 gomobile init
-output=MOBILE/android/oonimkall.aar
-gomobile bind -target=android -o $output -ldflags="-s -w" ./pkg/oonimkall
+version=$(date -u +%Y.%m.%d-%H%M%S)
+aarfile=MOBILE/android/oonimkall-$version.aar
+gomobile bind -target=android -o $aarfile -ldflags="-s -w" ./pkg/oonimkall
+pomfile=./MOBILE/android/oonimkall-$version.pom
+pomtemplate=./MOBILE/template.pom
+cat $pomtemplate|sed "s/@VERSION@/$version/g" > $pomfile
+if [ "$1" == "--sign" ]; then
+  cd ./MOBILE/android
+  for file in `ls *`; do
+    gpg -ab -u simone@openobservatory.org $file
+  done
+  jar -cvf bundle.jar oonimkall-$version*
+fi