Vocabuilder is a mobile application designed to help you learn new languages. It can help you learn new words and improve your vocabulary. The application has a list of words with its translation in another language. A combination of a word and its translation makes up a 'virtual flash card'. The words are displayed randomly, you can see a word (one side of the card), turn the 'card' to see the translation and mark it as 'done' if you already know the word or if you don't know it yet, mark it as 'wrong'
Enter an English word or phrase in the search bar to find it in the English-Esperanto dictionary. You are also welcome to input new words in English that you would like translated into Esperanto. There are many options to expand and filter your search as well
Apertium TinyLex is an open-source J2ME (Java 2 Micro Edition) program that can be used to translate words. The program is currently available for mobile devices supporting MIDP 2.0 and there is a version for almost all language pairs in Apertium