To get AirConsole Hero follow these steps:

• Download the AirConsole app (if you haven't already)
• Open the app and connect to AirConsole
• In the AirConsole games store, either select a Hero game unlock it or press the menu button on the top and select the "Get AirConsole Hero" button
• Depending on your smartphone operating system you will then be prompted by either the Android Play Store or AppStore to complete the purchase.

No, one Hero in a session removes ad-breaks for everyone.

How you manage subscriptions depends on your phone's operating system.
Guides on managing subscriptions for iOS
Guides on managing subscriptions for Android.

Some in-game content may be available only to Hero subscribers on their individual smartphones, other content is unlocked for everyone at once. Entire games that are Hero exclusive are made available for everybody in the session as long as at least one Hero subscriber is connected.

With the monthly subscription, you pay once per month. The AirConsole Hero subscription is auto-renewing. The monthly subscription is renewed automatically unless you cancel it in your settings 24 hours before the end of your current billing cycle. Guides on managing subscriptions can be found in the iOS Subscription Manager and for Android in the Play store.
To see your local pricing, connect your phone to AirConsole and select the Hero banner in the store.