First, open Incredible Maths. Then open the side menu and select Premium
Press continue
Once you have added a payment method, you can press Subscribe and you will complete your purchase.
Now click the Free Trial button. You can choose if you want to buy the Monthly subscription or the Yearly subscription.
If you haven’t added a payment method then you need to add one
Now you have joined Incredible Maths Premium and gained access to all the Premium content!