Yes: lessons, practice and mock exams are in the Licento app for iPhone, and the website is where you buy and manage your account.
licento.com sells the exams and runs your account: your purchases, Premium, your exam date, your devices and deleting your account. It has no lessons, questions or mock exams.
The app is for iPhone. Sign in there with the same e-mail address and password as on the website, and what you bought is there. You can also buy an exam inside the app, through the App Store.
If you buy on licento.com, the page after your purchase takes you to the app.