diff --git a/README.md b/README.md
index 861a73ed..9cb5a585 100644
--- a/README.md
+++ b/README.md
@@ -7,9 +7,10 @@ Through a combination of Adapter and Facade design patterns, this library allows
 [![build_and_publish](https://github.com/rjsuzuki/billingz/actions/workflows/release-package.yml/badge.svg)](https://github.com/rjsuzuki/billingz/actions/workflows/release-package.yml) [![](https://jitpack.io/v/rjsuzuki/billingz.svg)](https://jitpack.io/#rjsuzuki/billingz) [![](https://jitci.com/gh/rjsuzuki/billingz/svg)](https://jitci.com/gh/rjsuzuki/billingz)
 
 Currently supports up to: 
-   - `google billing: 5.0.0`  
-   - `amazon in-app: 2.0.76`  (v2.0.6)
-   - `amazon appstore sdk: 3.0.2` (v2.1.0+)
+
+- `google billing: 5.1.0`
+- `amazon in-app: 2.0.76`  (v2.0.6)
+- `amazon appstore sdk: 3.0.4` (v2.1.0+)
 ## Version History
 
 [Release History and Notes](https://github.com/rjsuzuki/billingz/releases)
diff --git a/buildSrc/src/main/java/Dependencies.kt b/buildSrc/src/main/java/Dependencies.kt
index aa379847..49df705a 100644
--- a/buildSrc/src/main/java/Dependencies.kt
+++ b/buildSrc/src/main/java/Dependencies.kt
@@ -40,8 +40,8 @@ object Dependencies {
     /**
      * Billing libs
      */
-    const val google_billing = "5.0.0"
-    const val amazon_iap = "3.0.2"
+    const val google_billing = "5.1.0"
+    const val amazon_iap = "3.0.4"
 
     /**
      * UI libs
diff --git a/lib/amazon/src/main/java/com/zuko/billingz/amazon/store/AmazonStore.kt b/lib/amazon/src/main/java/com/zuko/billingz/amazon/store/AmazonStore.kt
index 2a16f7f1..8d94f4c5 100644
--- a/lib/amazon/src/main/java/com/zuko/billingz/amazon/store/AmazonStore.kt
+++ b/lib/amazon/src/main/java/com/zuko/billingz/amazon/store/AmazonStore.kt
@@ -82,8 +82,9 @@ class AmazonStore internal constructor() : Storez {
 
     override fun resume() {
         Logger.v(TAG, "resuming...")
-        if (client.isReady())
+        if (client.isReady()) {
             sales.refreshQueries()
+        }
         else if (!client.initialized()) {
             client.init(context, connectionListener)
             client.connect()
diff --git a/lib/amazon/src/main/java/com/zuko/billingz/amazon/store/sales/AmazonSales.kt b/lib/amazon/src/main/java/com/zuko/billingz/amazon/store/sales/AmazonSales.kt
index 50132916..c5001026 100644
--- a/lib/amazon/src/main/java/com/zuko/billingz/amazon/store/sales/AmazonSales.kt
+++ b/lib/amazon/src/main/java/com/zuko/billingz/amazon/store/sales/AmazonSales.kt
@@ -148,6 +148,7 @@ class AmazonSales(
             PurchaseResponse.RequestStatus.ALREADY_PURCHASED -> Orderz.Result.PRODUCT_ALREADY_OWNED
             PurchaseResponse.RequestStatus.INVALID_SKU -> Orderz.Result.INVALID_PRODUCT
             PurchaseResponse.RequestStatus.NOT_SUPPORTED -> Orderz.Result.NOT_SUPPORTED
+            PurchaseResponse.RequestStatus.PENDING -> Orderz.Result.PENDING
         }
     }
 
@@ -491,7 +492,8 @@ class AmazonSales(
                 // again even if you receive a second receipt.
                 return false
             }
-            else -> {}
+
+            else -> Logger.w(TAG, "Unhandled ProductType: ${receipt.productType}")
         }
         return true
     }
diff --git a/lib/core/src/main/java/com/zuko/billingz/core/store/client/Clientz.kt b/lib/core/src/main/java/com/zuko/billingz/core/store/client/Clientz.kt
index 86857812..87d55ab1 100644
--- a/lib/core/src/main/java/com/zuko/billingz/core/store/client/Clientz.kt
+++ b/lib/core/src/main/java/com/zuko/billingz/core/store/client/Clientz.kt
@@ -25,8 +25,9 @@ import com.zuko.billingz.core.misc.CleanUpz
  * Blueprint of the core logic of the library.
  */
 interface Clientz : CleanUpz {
-
-    // fun getBillingClient(): BillingClient?
+    /**
+     *
+     */
     var connectionState: MutableLiveData<ConnectionStatus>
 
     /**
@@ -87,7 +88,7 @@ interface Clientz : CleanUpz {
      * Interface for reconnection logic to the billing service
      * INTERNAL USE ONLY
      */
-    interface ReconnectListener {
+    interface ReconnectListener { //todo
 
         /**
          *
diff --git a/lib/core/src/main/java/com/zuko/billingz/core/store/model/Offer.kt b/lib/core/src/main/java/com/zuko/billingz/core/store/model/Offer.kt
new file mode 100644
index 00000000..d7ece794
--- /dev/null
+++ b/lib/core/src/main/java/com/zuko/billingz/core/store/model/Offer.kt
@@ -0,0 +1,33 @@
+/*
+ *
+ *  * Copyright 2021 rjsuzuki
+ *  *
+ *  * Licensed under the Apache License, Version 2.0 (the "License");
+ *  * you may not use this file except in compliance with the License.
+ *  * You may obtain a copy of the License at
+ *  *
+ *  * http://www.apache.org/licenses/LICENSE-2.0
+ *  *
+ *  * Unless required by applicable law or agreed to in writing, software
+ *  * distributed under the License is distributed on an "AS IS" BASIS,
+ *  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  * See the License for the specific language governing permissions and
+ *  * limitations under the License.
+ *  *
+ *
+ */
+
+package com.zuko.billingz.core.store.model
+
+import android.os.Parcelable
+import kotlinx.parcelize.Parcelize
+
+@Parcelize
+data class Offer(
+    override val billingPeriod: String,
+    override val formattedPrice: String,
+    override val priceCurrencyCode: String,
+    override val priceAmountMicros: Long,
+    override val recurrenceMode: Int,
+    override val billingCycleCount: Int
+) : Productz.Offer, Parcelable
diff --git a/lib/core/src/main/java/com/zuko/billingz/core/store/model/OfferDetails.kt b/lib/core/src/main/java/com/zuko/billingz/core/store/model/OfferDetails.kt
new file mode 100644
index 00000000..bcfaf817
--- /dev/null
+++ b/lib/core/src/main/java/com/zuko/billingz/core/store/model/OfferDetails.kt
@@ -0,0 +1,30 @@
+/*
+ *
+ *  * Copyright 2021 rjsuzuki
+ *  *
+ *  * Licensed under the Apache License, Version 2.0 (the "License");
+ *  * you may not use this file except in compliance with the License.
+ *  * You may obtain a copy of the License at
+ *  *
+ *  * http://www.apache.org/licenses/LICENSE-2.0
+ *  *
+ *  * Unless required by applicable law or agreed to in writing, software
+ *  * distributed under the License is distributed on an "AS IS" BASIS,
+ *  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  * See the License for the specific language governing permissions and
+ *  * limitations under the License.
+ *  *
+ *
+ */
+
+package com.zuko.billingz.core.store.model
+
+import android.os.Parcelable
+import kotlinx.parcelize.Parcelize
+
+@Parcelize
+data class OfferDetails(
+    override val offerTags: List<String>,
+    override val offerToken: String,
+    override val offers: List<Offer>
+) : Productz.OfferDetails, Parcelable
diff --git a/lib/core/src/main/java/com/zuko/billingz/core/store/model/Orderz.kt b/lib/core/src/main/java/com/zuko/billingz/core/store/model/Orderz.kt
index 31217dc2..718aa9eb 100644
--- a/lib/core/src/main/java/com/zuko/billingz/core/store/model/Orderz.kt
+++ b/lib/core/src/main/java/com/zuko/billingz/core/store/model/Orderz.kt
@@ -109,6 +109,7 @@ interface Orderz : ModuleIdentifier {
         ERROR(6), // FAILED
         PRODUCT_ALREADY_OWNED(7),
         PRODUCT_NOT_OWNED(8),
-        NO_RESULT(9)
+        NO_RESULT(9),
+        PENDING(10)
     }
 }
diff --git a/lib/core/src/main/java/com/zuko/billingz/core/store/model/PricingInfo.kt b/lib/core/src/main/java/com/zuko/billingz/core/store/model/PricingInfo.kt
index 7ac26dad..4ece2fa6 100644
--- a/lib/core/src/main/java/com/zuko/billingz/core/store/model/PricingInfo.kt
+++ b/lib/core/src/main/java/com/zuko/billingz/core/store/model/PricingInfo.kt
@@ -27,5 +27,6 @@ data class PricingInfo(
     override val introPrice: String?,
     override val introPricePeriod: String?,
     override val billingPeriod: String?,
-    override val trialPeriod: String?
+    override val trialPeriod: String?,
+    override val subscriptionOffers: List<OfferDetails>?
 ) : Productz.Pricing, Parcelable
diff --git a/lib/core/src/main/java/com/zuko/billingz/core/store/model/Productz.kt b/lib/core/src/main/java/com/zuko/billingz/core/store/model/Productz.kt
index 92517615..7ac3aca8 100644
--- a/lib/core/src/main/java/com/zuko/billingz/core/store/model/Productz.kt
+++ b/lib/core/src/main/java/com/zuko/billingz/core/store/model/Productz.kt
@@ -126,5 +126,31 @@ interface Productz : ModuleIdentifier {
         val introPricePeriod: String?
         val billingPeriod: String?
         val trialPeriod: String?
+
+        /**
+         * Only available for Google products. Amazon products will return null.
+         */
+        val subscriptionOffers: List<OfferDetails>?
+    }
+
+    /**
+     * For Google Play SubscriptionOfferDetails support
+     */
+    interface OfferDetails {
+        val offerTags: List<String>
+        val offerToken: String
+        val offers: List<Offer>
+    }
+
+    /**
+     * For Google Play SubscriptionOfferDetails support
+     */
+    interface Offer {
+        val billingPeriod: String
+        val formattedPrice: String
+        val priceCurrencyCode: String
+        val priceAmountMicros: Long
+        val recurrenceMode: Int
+        val billingCycleCount: Int
     }
 }
diff --git a/lib/google/src/main/java/com/zuko/billingz/google/store/model/GoogleProduct.kt b/lib/google/src/main/java/com/zuko/billingz/google/store/model/GoogleProduct.kt
index 60ceed26..4a32dd83 100644
--- a/lib/google/src/main/java/com/zuko/billingz/google/store/model/GoogleProduct.kt
+++ b/lib/google/src/main/java/com/zuko/billingz/google/store/model/GoogleProduct.kt
@@ -21,6 +21,8 @@ package com.zuko.billingz.google.store.model
 
 import com.android.billingclient.api.ProductDetails
 import com.android.billingclient.api.SkuDetails
+import com.zuko.billingz.core.store.model.Offer
+import com.zuko.billingz.core.store.model.OfferDetails
 import com.zuko.billingz.core.store.model.PricingInfo
 import com.zuko.billingz.core.store.model.Productz
 import java.util.Currency
@@ -89,7 +91,8 @@ data class GoogleProduct(
                 introPrice = skuDetails.introductoryPrice,
                 introPricePeriod = skuDetails.introductoryPricePeriod,
                 billingPeriod = skuDetails.subscriptionPeriod,
-                trialPeriod = skuDetails.freeTrialPeriod
+                trialPeriod = skuDetails.freeTrialPeriod,
+                subscriptionOffers = null
             )
         }
 
@@ -117,24 +120,14 @@ data class GoogleProduct(
             currency =
                 Currency.getInstance(productDetails.subscriptionOfferDetails?.firstOrNull()?.pricingPhases?.pricingPhaseList?.firstOrNull()?.priceCurrencyCode)
 
-            productDetails.subscriptionOfferDetails?.forEach { offerDetails ->
-                offerDetails.offerToken
-                offerDetails.offerTags
-                offerDetails.pricingPhases.pricingPhaseList.forEach { pricingPhase ->
-                    pricingPhase.billingPeriod
-                    pricingPhase.formattedPrice
-                    pricingPhase.priceCurrencyCode
-                    pricingPhase.recurrenceMode
-                    pricingPhase.billingCycleCount
-                    pricingPhase.priceAmountMicros
-                }
-            }
             pricingInfo = PricingInfo(
                 introPrice = null,
                 introPricePeriod = null,
-                billingPeriod = productDetails.subscriptionOfferDetails?.firstOrNull()?.pricingPhases?.pricingPhaseList?.firstOrNull()?.billingPeriod,
-                trialPeriod = null
+                billingPeriod = null,
+                trialPeriod = null,
+                subscriptionOffers = convertSubscriptionOfferDetailsTo(productDetails.subscriptionOfferDetails)
             )
+
         } else {
             price = productDetails.oneTimePurchaseOfferDetails?.formattedPrice
             currency =
@@ -142,6 +135,42 @@ data class GoogleProduct(
         }
     }
 
+    private fun convertSubscriptionOfferDetailsTo(offers: List<ProductDetails.SubscriptionOfferDetails>?): List<OfferDetails>? {
+        if (offers.isNullOrEmpty()) {
+            return null
+        }
+        val offerDetailsList = mutableListOf<OfferDetails>()
+        offers.forEach {
+            val details = convertSubscriptionOfferTo(it)
+            offerDetailsList.add(details)
+        }
+        return offerDetailsList
+    }
+
+    private fun convertSubscriptionOfferTo(offer: ProductDetails.SubscriptionOfferDetails): OfferDetails {
+        val offers = mutableListOf<Offer>()
+        offer.pricingPhases.pricingPhaseList.forEach { pricingPhase ->
+            val o = convertPricingPhaseTo(pricingPhase)
+            offers.add(o)
+        }
+        return OfferDetails(
+            offerTags = offer.offerTags,
+            offerToken = offer.offerToken,
+            offers = offers
+        )
+    }
+
+    private fun convertPricingPhaseTo(p: ProductDetails.PricingPhase): Offer {
+        return Offer(
+            billingPeriod = p.billingPeriod,
+            formattedPrice = p.formattedPrice,
+            priceCurrencyCode = p.priceCurrencyCode,
+            priceAmountMicros = p.priceAmountMicros,
+            recurrenceMode = p.recurrenceMode,
+            billingCycleCount = p.billingCycleCount
+        )
+    }
+
     override fun getProductId(): String? {
         return productId
     }
diff --git a/lib/google/src/main/java/com/zuko/billingz/google/store/sales/GoogleSales.kt b/lib/google/src/main/java/com/zuko/billingz/google/store/sales/GoogleSales.kt
index 51c4ae07..caf45b58 100644
--- a/lib/google/src/main/java/com/zuko/billingz/google/store/sales/GoogleSales.kt
+++ b/lib/google/src/main/java/com/zuko/billingz/google/store/sales/GoogleSales.kt
@@ -818,7 +818,11 @@ class GoogleSales(
     private fun queryOrderHistory(type: Productz.Type?) {
         Logger.v(TAG, "queryOrderHistory: $type")
         val skuType =
-            if (type == Productz.Type.SUBSCRIPTION) BillingClient.ProductType.SUBS else BillingClient.ProductType.INAPP
+            if (type == Productz.Type.SUBSCRIPTION) {
+                BillingClient.ProductType.SUBS
+            } else {
+                BillingClient.ProductType.INAPP
+            }
 
         mainScope.launch(dispatcher.io()) {
             if (isNewVersion) {
@@ -862,9 +866,9 @@ class GoogleSales(
                 receipt.entitlement = record.purchaseToken
                 receipt.orderDate = Date(record.purchaseTime)
                 if (isNewVersion) {
-                    receipt.skus = record.products
+                    receipt.skus = record.products.toList()
                 } else {
-                    receipt.skus = record.skus
+                    receipt.skus = record.skus.toList()
                 }
                 receipt.originalJson = record.originalJson
                 receipt.quantity = record.quantity
diff --git a/version.properties b/version.properties
index 68e179b7..f792e88e 100644
--- a/version.properties
+++ b/version.properties
@@ -19,4 +19,4 @@
 
 v.major=3
 v.minor=0
-v.patch=10
+v.patch=11