Rosetta Stone is described as 'Language-learning software using spaced repetition, employing images, text, sound, and video to teach without translation, offering customized feedback' and is a popular language learning tool in the education & reference category. There are more than 100 alternatives to Rosetta Stone for a variety of platforms, including iPhone, Android, Web-based, iPad and Android Tablet apps. The best Rosetta Stone alternative is Duolingo, which is free. Other great apps like Rosetta Stone are Memrise, LibreLingo, Busuu and Babbel.