...

app/src/main/res/values/strings.xml

 <resources>
-    <string name="app_name">File Recovery &amp; Photo Recovery</string>
+    <string name="app_name">Cleaner Junk: Recovery, Privacy</string>
     <!-- TODO: Remove or change this placeholder text -->
     <string name="hello_blank_fragment">Hello blank fragment</string>
     <string name="facebook_app_id">1141667540450666</string>