There are free trial versions of both the Meludia web application and the Meludia Melody mobile app, which allow you to test out a variety of exercises. There is also a paid version of each application which provides access to all the exercises.
Meludia web application

By creating an account, you can access a free trial, which will allow you to test all the exercises of the application.

To access all the exercises in the Meludia web application you must take a monthly or annual subscription.

Please check the Offers page for more information.
Application mobile Meludia Melody

The Meludia Melody mobile app includes a free trial and a single In-App purchase.

The free trial allows you to test 5 exercises in 60 levels in 12 different keys. In the full program, you’ll have access to 700 exercises and more than one million carefully selected melodic sequences.