A free app for Android, by AllDict.

Russian-Spanish Dictionary is a free-access online-offline dictionary for Android devices, which provides a large amount of information about the Russian language and the Spanish language. The app can be used without any Internet connection, which makes it perfect for people who do not have access to the Internet, and it is also suitable for people who have access to the Internet but do not want to use it (for example, in a public place or in a military environment).

The app has a large number of options for searching the dictionary, and it has an extensive word trainer, which makes it possible for you to learn all the words in the dictionary with the help of the word trainer.