Monthly subscriptions can be purchased through the App Store.
All you have to do is
i. Tap the App Store app on your Home screen.
ii. Browse or search for MirrorMeister, then tap the app.
iii. Tap Get. You might need to sign in with your Apple ID.
After your MirrorMeitser app finishes downloading, you can move it to a different spot on your Home screen.
You pay only 3,99 euros per month to start mirroring your iPhone, iPad, and Mac on your TV. MirrorMeister also offers a free trial and is eligible for Family Sharing.