memo.ua is a simple and user-friendly programme based on a cyclic revision of studied material according to your memory rhythms. Working with memo.ua you are going to perform the same task entered into your database with the following recurrence: - One week: 7 days - 7 correct answers; - One month: 3 correct answers; - Three months: 3 correct answers; - Six months: 3 correct answers; - One year: 3 correct answers. memo.ua can be used while studying any theoretical subjects or matters, but the highest effectiveness of it proved to have had a real success in learning languages.