Caribu has a few subscription plans and includes a free trial.
The plans start at $6.99/month with major discounts when you subscribe annually at $67.99.
A Caribu subscription gives you unlimited access to our library with hundreds of books and activities in seven languages to read and draw/color.
You can cancel at any time.
For help on adding a book to your favorites, please refer to that article.
You can also subscribe by going to Settings and then tap on 'Manage Subscription".