diff --git a/nx/include/switch/services/ns.h b/nx/include/switch/services/ns.h
index 9f6e7a381..6903c8dee 100644
--- a/nx/include/switch/services/ns.h
+++ b/nx/include/switch/services/ns.h
@@ -771,6 +771,18 @@ Result nsIsAnyApplicationEntityInstalled(u64 application_id, bool *out);
  */
 Result nsCleanupUnavailableAddOnContents(u64 application_id, AccountUid uid);
 
+/**
+ * @brief EstimateSizeToMove
+ * @note Only available on [10.0.0+].
+ * @param[in] storage_ids Array of u8 \ref NcmStorageId.
+ * @param[in] count Size of the storage_ids array in entries.
+ * @param[in] storage_id storage_id \ref NcmStorageId
+ * @param[in] flags Flags
+ * @param[in] application_id ApplicationId.
+ * @param[out] Out Output value.
+ */
+Result nsEstimateSizeToMove(u8 *storage_ids, s32 count, NcmStorageId storage_id, u32 flags, u64 application_id, s64 *out);
+
 /**
  * @brief FormatSdCard
  * @note Only available on [2.0.0+].
diff --git a/nx/source/services/ns.c b/nx/source/services/ns.c
index d57ac199a..e63cdd7c4 100644
--- a/nx/source/services/ns.c
+++ b/nx/source/services/ns.c
@@ -1309,6 +1309,29 @@ Result nsCleanupUnavailableAddOnContents(u64 application_id, AccountUid uid) {
     return rc;
 }
 
+Result nsEstimateSizeToMove(u8 *storage_ids, s32 count, NcmStorageId storage_id, u32 flags, u64 application_id, s64 *out) {
+    if (hosversionBefore(10,0,0))
+        return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
+
+    Service srv={0};
+    Result rc = nsGetApplicationManagerInterface(&srv);
+
+    const struct {
+        u8 storage_id;
+        u8 pad[3];
+        u32 flags;
+        u64 application_id;
+    } in = { storage_id, {0}, flags, application_id };
+
+    if (R_SUCCEEDED(rc)) rc = serviceDispatchInOut(&srv, 1311, in, *out,
+        .buffer_attrs = { SfBufferAttr_HipcMapAlias | SfBufferAttr_In },
+        .buffers = { { storage_ids, count*sizeof(u8) } },
+    );
+
+    serviceClose(&srv);
+    return rc;
+}
+
 Result nsFormatSdCard(void) {
     if (hosversionBefore(2,0,0))
         return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);