Google Play is introducing new subscription features aimed at AI applications and services with variable costs. These include Usage-Based Billing, allowing users to maintain a prepaid balance that replenishes automatically; Multi-Quantity Subscriptions for organizations to purchase multiple subscriptions in one transaction; Mixed Carts for offering auto-renewing subscriptions alongside one-time purchases; and Cross-Developer Bundling for selling complementary subscriptions from different developers as a single package. Additionally, Google is enhancing user retention through a Dynamic Grace Period for payment issues, Retention Offers during cancellation, and personalized winback offers for former subscribers. Many of these features are currently available or being rolled out through Google's Early Access Program.