What is a subscription group?

Apple requires every auto-renewable subscription to belong to a group and to have a level inside it. You rank the subscriptions from the one that offers the most (level 1) to the one that offers the least, and you can put equal plans on the same level. Apple's advice is a single group for most apps, because people can buy only one subscription in a group and the group prevents accidental double purchases. If your app sells separate services, such as two streaming channels, use one group per service. Customers with subscriptions in two groups are billed separately for each.

The group also controls offers and revenue. Each person can redeem one introductory offer per group, even if several products in the group have one. Days of paid service, which decide when Apple's 85% rate starts, are counted per group.

Google Play has no group. A single subscription product holds several base plans, and plan changes work through replacement modes. In RevenueDot a package in an offering holds one product per app, so the group matters only when you create products in App Store Connect. RevenueDot can create the subscription and reuse a group by name.

Sources: Apple: Auto-renewable subscriptions · App Store Connect Help: Set up introductory offers