| AccountIdentifiers | Class that contains the Account Identifiers of a Purchase. |
| AcknowledgeParams | Class with the parameters to Acknowledge a Purchase. |
| AcknowledgeParams.Builder | Builder class used to construct the AcknowledgeParams. |
| AptoideBillingClient | Main interface for handling in-app billing in your application. |
| BillingFlowParams | Class with the parameters necessary to initiate a purchase flow. |
| BillingFlowParams.Builder | Builder class used to construct the BillingFlowParams. |
| BillingFlowParams.ProductDetailsParams | Class with the Product Details of the Product to initiate a Billing flow for. |
| BillingFlowParams.ProductDetailsParams.Builder | Builder class used to construct the BillingFlowParams.ProductDetailsParams. |
| BillingResult | Class that represents the result of a Billing operation. |
| ConsumeParams | Class with the parameters to Consume a Purchase. |
| ConsumeParams.Builder | Builder class used to construct the ConsumeParams. |
| ProductDetails | Class that represents the details of a Product. |
| ProductDetails.OneTimePurchaseOfferDetails | Class that represents the offer details of a Product of type One Time Purchase (INAPP). |
| ProductDetails.PricingPhase | Class that represents the Pricing Phase of a Product of type Subscription (SUBS). |
| ProductDetails.PricingPhases | Class that represents the Pricing Phases available in a Product of type Subscription (SUBS). |
| ProductDetails.SubscriptionOfferDetails | Class that represents the offer details of a Product of type Subscriptions (SUBS). |
| ProductDetails.TrialDetails | Class that represents the trial details of a Product of type Subscription (SUBS). |
| Purchase | Class that represents a Purchase. |
| QueryProductDetailsParams | Class with the parameters to query for ProductDetails. |
| QueryProductDetailsParams.Builder | Builder class used to construct the QueryProductDetailsParams. |
| QueryProductDetailsParams.Product | Class with the parameters of the Product to query for ProductDetails. |
| QueryProductDetailsParams.Product.Builder | Builder class used to construct the QueryProductDetailsParams.Product. |
| QueryProductDetailsResult | Class with the parameters that are returned in a query result for Product Details. |
| QueryPurchasesParams | Class with the parameters to query for Purchases. |
| QueryPurchasesParams.Builder | Builder class used to construct the QueryPurchasesParams. |
| ReferralDeeplink | Represents a response for a Deeplink Referral request. |
| SkuDetails (Deprecated) | Class that represents the details of a Product. |
| SkuDetailsParams (Deprecated) | Class with the parameters necessary to query for Sku Details. |
| UnfetchedProduct | Class that represents the unfetched Product in a Product Details query. |