The String Learning Digital Library
Get access to university content test. Use all features with no limits.
University content is accessible by purchasing monthly or yearly subscription which can be canceled at any time. The subscription allows you to use all features like AI question selection algorithm, statistic view, chapter selection, and mobile application.
Use however much you want. No payments. Ever.
With free access, you can play unlimited times any of the tests. However, you will not be able to save your stats, use AI selection algorithm and mobile application. Freemium game is always a pool of random questions from different chapters and answers do not record.