app for tablet and phone do not work during a paid subscription

Hi, today i signed up a paid annual subscription to musescore.
i tried to transpose the chords of a song, but pc told me that this function is available from app of tablet or phone.
i downloaded the apps on tablet and phone, but musescore asks me to make a free trial for a few day and then i will pay a paid subscription.
i already have the paid subscription. i payed today. have i to pay a subscription for each tool? i Think and hope not.
can you help me?
thank you and best regards dario cavallini francolini