A free app for Android, by Dragoma.

This is a free and offline dictionary of German and English. You can use it without any internet connection, so you can save your mobile data. It contains more than 100,000 words and phrases, and an intelligent search function. You can use it while reading PDFs, browsing the web, and playing games. It also supports Voice Search.

How to Use it?

Select a word or phrase, and click on the “copy” option from the Options Menu.

Click on the “translation” option and the translation will appear right there on the screen.

If the word or phrase is not found, you can select and hold the word or phrase to get the definition.