diff --git a/.gitmodules b/.gitmodules
index d89ed20a9c0..1f0c888aaa1 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,4 +1,4 @@
 [submodule "upstreams/androidx-main"]
 	path = upstreams/androidx-main
 	url = ./
-	branch = androidx-main-3.3.0-alpha02
+	branch = androidx-main-3.3.0-alpha03
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 455d3b2bc42..9228a2d5639 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -2,7 +2,7 @@
 android = "8.5.1"
 androidx-activity-compose = "1.9.1"
 androidx-appcompat = "1.7.0"
-androidx-paging = "3.3.0-alpha02"
+androidx-paging = "3.3.0-alpha03"
 kotlin = "1.9.24"
 kotlinx-coroutines = "1.8.1"
 kotlinx-serialization-json = "1.7.1"
diff --git a/paging-common/README.md b/paging-common/README.md
index e6ee18d309d..e0775709911 100644
--- a/paging-common/README.md
+++ b/paging-common/README.md
@@ -118,6 +118,6 @@ Consult the following table for guidance based on which APIs are being used.
 | `PagingConfig`                                                | Use `createPagingConfig`.               |
 | `PagingData.Companion.empty(LoadStates, LoadStates?)`         | Pass in the default value yourself.     |
 | `PagingData.Companion.from(List<T>, LoadStates, LoadStates?)` | Pass in the default value yourself.     |
-| `PagingDataDiffer`                                            | Pass in the default value yourself.     |
+| `PagingDataPresenter`                                         | Pass in the default value yourself.     |
 | `PagingLogger.log(Int, String, Throwable?)`                   | Pass in the default value yourself.     |
 | `PagingSourceLoadResultPage`                                  | Use `createPagingSourceLoadResultPage`. |
diff --git a/paging-common/src/commonNonAndroidXMain/kotlin/app/cash/paging/PagingDataDiffer.kt b/paging-common/src/commonAndroidXMain/kotlin/app/cash/paging/PagingDataPresenter.kt
similarity index 84%
rename from paging-common/src/commonNonAndroidXMain/kotlin/app/cash/paging/PagingDataDiffer.kt
rename to paging-common/src/commonAndroidXMain/kotlin/app/cash/paging/PagingDataPresenter.kt
index 37eb61586b6..76db4695562 100644
--- a/paging-common/src/commonNonAndroidXMain/kotlin/app/cash/paging/PagingDataDiffer.kt
+++ b/paging-common/src/commonAndroidXMain/kotlin/app/cash/paging/PagingDataPresenter.kt
@@ -19,9 +19,6 @@ package app.cash.paging
 /** @suppress */
 // Constructor has default argument values.
 @Suppress("NO_ACTUAL_CLASS_MEMBER_FOR_EXPECTED_CLASS")
-actual typealias PagingDataDiffer<T> = androidx.paging.PagingDataDiffer<T>
-
-/** @suppress */
-actual typealias DifferCallback = androidx.paging.DifferCallback
+actual typealias PagingDataPresenter<T> = androidx.paging.PagingDataPresenter<T>
 
 actual typealias DiffingChangePayload = androidx.paging.DiffingChangePayload
diff --git a/paging-common/src/commonAndroidXMain/kotlin/app/cash/paging/NullPaddedList.kt b/paging-common/src/commonAndroidXMain/kotlin/app/cash/paging/PlaceholderPaddedList.kt
similarity index 88%
rename from paging-common/src/commonAndroidXMain/kotlin/app/cash/paging/NullPaddedList.kt
rename to paging-common/src/commonAndroidXMain/kotlin/app/cash/paging/PlaceholderPaddedList.kt
index c1058ad14a6..b7a82263583 100644
--- a/paging-common/src/commonAndroidXMain/kotlin/app/cash/paging/NullPaddedList.kt
+++ b/paging-common/src/commonAndroidXMain/kotlin/app/cash/paging/PlaceholderPaddedList.kt
@@ -17,4 +17,4 @@
 package app.cash.paging
 
 /** @suppress */
-actual typealias NullPaddedList<T> = androidx.paging.NullPaddedList<T>
+actual typealias PlaceholderPaddedList<T> = androidx.paging.PlaceholderPaddedList<T>
diff --git a/paging-common/src/commonMain/kotlin/app/cash/paging/PagingDataDiffer.kt b/paging-common/src/commonMain/kotlin/app/cash/paging/PagingDataPresenter.kt
similarity index 83%
rename from paging-common/src/commonMain/kotlin/app/cash/paging/PagingDataDiffer.kt
rename to paging-common/src/commonMain/kotlin/app/cash/paging/PagingDataPresenter.kt
index e34a0d61296..c52fc946243 100644
--- a/paging-common/src/commonMain/kotlin/app/cash/paging/PagingDataDiffer.kt
+++ b/paging-common/src/commonMain/kotlin/app/cash/paging/PagingDataPresenter.kt
@@ -21,8 +21,7 @@ import kotlinx.coroutines.flow.StateFlow
 import kotlin.coroutines.CoroutineContext
 
 /** @suppress */
-expect abstract class PagingDataDiffer<T : Any>(
-  differCallback: DifferCallback,
+expect abstract class PagingDataPresenter<T : Any>(
   /* default = Dispatchers.Main */
   mainContext: CoroutineContext,
   /* default = null */
@@ -30,8 +29,8 @@ expect abstract class PagingDataDiffer<T : Any>(
 ) {
 
   abstract suspend fun presentNewList(
-    previousList: NullPaddedList<T>,
-    newList: NullPaddedList<T>,
+    previousList: PlaceholderPaddedList<T>,
+    newList: PlaceholderPaddedList<T>,
     lastAccessedIndex: Int,
     onListPresentable: () -> Unit,
   ): Int?
@@ -65,13 +64,6 @@ expect abstract class PagingDataDiffer<T : Any>(
   fun removeLoadStateListener(listener: (CombinedLoadStates) -> Unit)
 }
 
-/** @suppress */
-expect interface DifferCallback {
-  fun onChanged(position: Int, count: Int)
-  fun onInserted(position: Int, count: Int)
-  fun onRemoved(position: Int, count: Int)
-}
-
 expect enum class DiffingChangePayload {
   ITEM_TO_PLACEHOLDER,
   PLACEHOLDER_TO_ITEM,
diff --git a/paging-common/src/commonMain/kotlin/app/cash/paging/NullPaddedList.kt b/paging-common/src/commonMain/kotlin/app/cash/paging/PlaceholderPaddedList.kt
similarity index 87%
rename from paging-common/src/commonMain/kotlin/app/cash/paging/NullPaddedList.kt
rename to paging-common/src/commonMain/kotlin/app/cash/paging/PlaceholderPaddedList.kt
index 33299239074..36b4546758c 100644
--- a/paging-common/src/commonMain/kotlin/app/cash/paging/NullPaddedList.kt
+++ b/paging-common/src/commonMain/kotlin/app/cash/paging/PlaceholderPaddedList.kt
@@ -17,10 +17,10 @@
 package app.cash.paging
 
 /** @suppress */
-expect interface NullPaddedList<T> {
+expect interface PlaceholderPaddedList<T> {
   val placeholdersBefore: Int
-  fun getFromStorage(localIndex: Int): T
   val placeholdersAfter: Int
   val size: Int
-  val storageCount: Int
+  val dataCount: Int
+  fun getItem(index: Int): T
 }
diff --git a/paging-common/src/commonAndroidXMain/kotlin/app/cash/paging/PagingDataDiffer.kt b/paging-common/src/commonNonAndroidXMain/kotlin/app/cash/paging/PagingDataPresenter.kt
similarity index 84%
rename from paging-common/src/commonAndroidXMain/kotlin/app/cash/paging/PagingDataDiffer.kt
rename to paging-common/src/commonNonAndroidXMain/kotlin/app/cash/paging/PagingDataPresenter.kt
index 37eb61586b6..76db4695562 100644
--- a/paging-common/src/commonAndroidXMain/kotlin/app/cash/paging/PagingDataDiffer.kt
+++ b/paging-common/src/commonNonAndroidXMain/kotlin/app/cash/paging/PagingDataPresenter.kt
@@ -19,9 +19,6 @@ package app.cash.paging
 /** @suppress */
 // Constructor has default argument values.
 @Suppress("NO_ACTUAL_CLASS_MEMBER_FOR_EXPECTED_CLASS")
-actual typealias PagingDataDiffer<T> = androidx.paging.PagingDataDiffer<T>
-
-/** @suppress */
-actual typealias DifferCallback = androidx.paging.DifferCallback
+actual typealias PagingDataPresenter<T> = androidx.paging.PagingDataPresenter<T>
 
 actual typealias DiffingChangePayload = androidx.paging.DiffingChangePayload
diff --git a/paging-common/src/commonNonAndroidXMain/kotlin/app/cash/paging/NullPaddedList.kt b/paging-common/src/commonNonAndroidXMain/kotlin/app/cash/paging/PlaceholderPaddedList.kt
similarity index 88%
rename from paging-common/src/commonNonAndroidXMain/kotlin/app/cash/paging/NullPaddedList.kt
rename to paging-common/src/commonNonAndroidXMain/kotlin/app/cash/paging/PlaceholderPaddedList.kt
index c1058ad14a6..b7a82263583 100644
--- a/paging-common/src/commonNonAndroidXMain/kotlin/app/cash/paging/NullPaddedList.kt
+++ b/paging-common/src/commonNonAndroidXMain/kotlin/app/cash/paging/PlaceholderPaddedList.kt
@@ -17,4 +17,4 @@
 package app.cash.paging
 
 /** @suppress */
-actual typealias NullPaddedList<T> = androidx.paging.NullPaddedList<T>
+actual typealias PlaceholderPaddedList<T> = androidx.paging.PlaceholderPaddedList<T>
diff --git a/upstreams/androidx-main b/upstreams/androidx-main
index 9cb4b0abdc4..616490fe032 160000
--- a/upstreams/androidx-main
+++ b/upstreams/androidx-main
@@ -1 +1 @@
-Subproject commit 9cb4b0abdc4a6aae1d9b633199e299d9ed9bd9ba
+Subproject commit 616490fe03253dd0a91bebd6b43b94f851d4a224