RoadtoGrammar currently offers the following apps for Android devices (Android 2.2 and above)

Idioms

This is the most popular RoadToGrammar app.

Practice over 150 idioms on your Android device!

Download the app from here

Or search for 'idioms' in the Android Marketplace.

Question Tags

Question Tags (isn't it?, doesn't he?) can be tricky.

Practice them until you get them right, right on your Android device!

Download the app from here

Or search for 'question forms' in the Android Marketplace.

Word Strips

This is a version of the popular Word Strips game, featured on RoadToGrammar.com

See how many words you can form and compete for a monthly high score!

Download the app from here

Or search for 'Word Strips' in the Android Marketplace.

Uncountable Nouns

Master the topic of Uncountable Nouns on your Android phone.

Download the app from here

Or search for 'Uncountable Nouns' in the Android Marketplace.