diff --git a/ios/react-native/MPCKeyService.swift b/ios/react-native/MPCKeyService.swift
index 0069ce3..0ff5e9d 100644
--- a/ios/react-native/MPCKeyService.swift
+++ b/ios/react-native/MPCKeyService.swift
@@ -22,6 +22,10 @@ class MPCKeyService: NSObject {
         
         return false;
     }
+    
+    @objc static func requiresMainQueueSetup() -> Bool {
+        return true
+    }
 
     /**
      Initializes the MPCKeyService  with the given parameters.
diff --git a/ios/react-native/MPCSdk.swift b/ios/react-native/MPCSdk.swift
index a117d29..1b16f22 100644
--- a/ios/react-native/MPCSdk.swift
+++ b/ios/react-native/MPCSdk.swift
@@ -24,6 +24,10 @@ class MPCSdk: NSObject {
         return false
     }
 
+    @objc static func requiresMainQueueSetup() -> Bool {
+        return true
+    }
+    
     /**
      Initializes the MPCSdk  with the given parameters.
      Resolves with the string "success" on success; rejects with an error otherwise.
diff --git a/ios/react-native/MPCWalletService.swift b/ios/react-native/MPCWalletService.swift
index c01c8a9..ac09395 100644
--- a/ios/react-native/MPCWalletService.swift
+++ b/ios/react-native/MPCWalletService.swift
@@ -32,6 +32,10 @@ class MPCWalletService: NSObject {
             reject(walletsErr, error.localizedDescription, nil)
         }
     }
+    
+    @objc static func requiresMainQueueSetup() -> Bool {
+        return true
+    }
 
     /**
      Creates an MPCWallet with the given parameters.  Resolves with the response on success; rejects with an error
diff --git a/ios/react-native/PoolService.swift b/ios/react-native/PoolService.swift
index 251174c..a80c8f7 100644
--- a/ios/react-native/PoolService.swift
+++ b/ios/react-native/PoolService.swift
@@ -24,6 +24,10 @@ class PoolService: NSObject {
             reject(poolsErr, error.localizedDescription, nil)
         }
     }
+    
+    @objc static func requiresMainQueueSetup() -> Bool {
+        return true
+    }
 
     /**
      Creates a Pool with the given parameters.  Resolves with the created Pool object on success; rejects with an error
diff --git a/ios/swift/Job.swift b/ios/swift/Job.swift
new file mode 100644
index 0000000..5a8ad02
--- /dev/null
+++ b/ios/swift/Job.swift
@@ -0,0 +1,26 @@
+import Foundation
+
+/**
+ This class manages different .qos options for the dispatch queues Waas uses, to make it easier to
+ support user-configurable QOS in the future.
+ */
+class Job {
+    /**
+    Return a dispatch queue for running on a background thread.
+     */
+    class func background() -> DispatchQueue {
+        return DispatchQueue.global(qos: .background)
+    }
+    
+    class func backgroundHighPri() -> DispatchQueue {
+        return DispatchQueue.global(qos: .userInteractive)
+    }
+    
+    /**
+            Return a dispatch queue for running on the main/UI thread.
+     */
+    class func main() -> DispatchQueue {
+        DispatchQueue.main
+    }
+}
+
diff --git a/ios/swift/WaasSdk/MPCKeyService.swift b/ios/swift/WaasSdk/MPCKeyService.swift
index d955428..e2ae09c 100644
--- a/ios/swift/WaasSdk/MPCKeyService.swift
+++ b/ios/swift/WaasSdk/MPCKeyService.swift
@@ -41,7 +41,7 @@ public class MPCKeyService: NSObject {
      */
     public func registerDevice() -> Future<V1Device, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 do {
                     let device = try self.keyClient?.registerDevice()
                     promise(Result.success(device!))
@@ -60,7 +60,7 @@ public class MPCKeyService: NSObject {
      */
     public func pollForPendingDeviceGroup(_ deviceGroup: NSString, pollInterval: NSNumber) -> Future<NSArray, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 do {
                     let pendingDeviceGroupData = try self.keyClient?.pollPendingDeviceGroup(
                         deviceGroup as String,
@@ -82,7 +82,7 @@ public class MPCKeyService: NSObject {
      */
     public func stopPollingForPendingDeviceGroup() -> Future<String, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 self.keyClient?.stopPollingPendingDeviceBackups(goReturnsString(promise: promise, wrapAsError: self.wrapError))
             })
          }
@@ -94,7 +94,7 @@ public class MPCKeyService: NSObject {
      */
     public func createSignatureFromTx(_ parent: NSString, transaction: NSDictionary) -> Future<String, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 do {
                     let serializedTx = try JSONSerialization.data(withJSONObject: transaction)
                     self.keyClient?.createTxSignature(parent as String, tx: serializedTx, receiver: goReturnsString(promise: promise, wrapAsError: self.wrapError))
@@ -113,7 +113,7 @@ public class MPCKeyService: NSObject {
      */
     public func pollForPendingSignatures(_ deviceGroup: NSString, pollInterval: NSNumber) -> Future<NSArray, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 do {
                     let pendingSignaturesData = try self.keyClient?.pollPendingSignatures(
                         deviceGroup as String,
@@ -135,7 +135,7 @@ public class MPCKeyService: NSObject {
      */
     public func stopPollingForPendingSignatures() -> Future<String, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 self.keyClient?.stopPollingPendingSignatures(goReturnsString(promise: promise, wrapAsError: self.wrapError))
             })
         }
@@ -147,7 +147,7 @@ public class MPCKeyService: NSObject {
      */
     public func waitPendingSignature(_ operation: NSString) -> Future<V1Signature, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 var signature: V1Signature?
                 do {
                     signature = try self.keyClient?.waitPendingSignature(operation as String)
@@ -164,7 +164,7 @@ public class MPCKeyService: NSObject {
      */
     public func getSignedTransaction(_ transaction: NSDictionary, signature: NSDictionary) -> Future<V1SignedTransaction, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 do {
                     let serializedTx = try JSONSerialization.data(withJSONObject: transaction)
                     let goSignature = V1Signature()
@@ -188,7 +188,7 @@ public class MPCKeyService: NSObject {
      */
     public func getDeviceGroup(_ name: NSString) -> Future<V1DeviceGroup, WaasError>{
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 do {
                     let deviceGroupRes = try self.keyClient?.getDeviceGroup(name as String)
                     promise(Result.success(deviceGroupRes!))
@@ -205,7 +205,7 @@ public class MPCKeyService: NSObject {
      */
     public func prepareDeviceArchive(_ deviceGroup: NSString, device: NSString) -> Future<String, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 self.keyClient?.prepareDeviceArchive(
                     deviceGroup as String, device: device as String, receiver: goReturnsString(promise: promise, wrapAsError: self.wrapError))
             })
@@ -220,7 +220,7 @@ public class MPCKeyService: NSObject {
      */
     public func pollForPendingDeviceArchives(_ deviceGroup: NSString, pollInterval: NSNumber) -> Future<NSArray, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 do {
                     let pendingDeviceArchiveData = try self.keyClient?.pollPendingDeviceArchives(
                         deviceGroup as String,
@@ -241,7 +241,7 @@ public class MPCKeyService: NSObject {
      */
     public func stopPollingForPendingDeviceArchives() -> Future<String, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 self.keyClient?.stopPollingPendingDeviceArchives(goReturnsString(promise: promise, wrapAsError: self.wrapError))
             })
         }
@@ -253,7 +253,7 @@ public class MPCKeyService: NSObject {
      */
     public func prepareDeviceBackup(_ deviceGroup: NSString, device: NSString) -> Future<String, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 self.keyClient?.prepareDeviceBackup(
                     deviceGroup as String, device: device as String, receiver: goReturnsString(promise: promise, wrapAsError: self.wrapError))
             })
@@ -268,7 +268,7 @@ public class MPCKeyService: NSObject {
      */
     public func pollForPendingDeviceBackups(_ deviceGroup: NSString, pollInterval: NSNumber) -> Future<NSArray, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 do {
                     let pendingDeviceBackupData = try self.keyClient?.pollPendingDeviceBackups(
                         deviceGroup as String,
@@ -291,7 +291,7 @@ public class MPCKeyService: NSObject {
      */
     public func stopPollingForPendingDeviceBackups() -> Future<String, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 self.keyClient?.stopPollingPendingDeviceBackups(goReturnsString(promise: promise, wrapAsError: self.wrapError))
             })
         }
@@ -303,7 +303,7 @@ public class MPCKeyService: NSObject {
      */
     public func addDevice(_ deviceGroup: NSString, device: NSString) -> Future<String, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 self.keyClient?.addDevice(
                     deviceGroup as String, device: device as String, receiver: goReturnsString(promise: promise, wrapAsError: self.wrapError))
             })
@@ -318,7 +318,7 @@ public class MPCKeyService: NSObject {
      */
     public func pollForPendingDevices(_ deviceGroup: NSString, pollInterval: NSNumber) -> Future<NSArray, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 do {
                     let pendingDeviceData = try self.keyClient?.pollPendingDevices(
                         deviceGroup as String,
@@ -341,7 +341,7 @@ public class MPCKeyService: NSObject {
      */
     public func stopPollingForPendingDevices() -> Future<String, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 self.keyClient?.stopPollingPendingDevices(goReturnsString(promise: promise, wrapAsError: self.wrapError))
             })
         }
diff --git a/ios/swift/WaasSdk/MPCSdk.swift b/ios/swift/WaasSdk/MPCSdk.swift
index c0c610f..c39be49 100644
--- a/ios/swift/WaasSdk/MPCSdk.swift
+++ b/ios/swift/WaasSdk/MPCSdk.swift
@@ -43,7 +43,7 @@ public class MPCSdk: NSObject {
      */
     public func bootstrapDevice(_ passcode: NSString) -> Future<String, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.main().async(execute: {
                 self.sdk.bootstrapDevice(passcode as String, receiver: goReturnsString(promise: promise, wrapAsError: self.wrapError))
             })
         }
@@ -58,7 +58,7 @@ public class MPCSdk: NSObject {
      */
     public func resetPasscode(_ newPasscode: NSString) -> Future<Void, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.main().async(execute: {
                 do {
                     try self.sdk.resetPasscode(newPasscode as String)
                     promise(Result.success(()))
@@ -75,7 +75,7 @@ public class MPCSdk: NSObject {
      */
     public func getRegistrationData() -> Future<String, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.main().async(execute: {
                 self.sdk.getRegistrationData(goReturnsString(promise: promise, wrapAsError: self.wrapError))
             })
         }
@@ -88,7 +88,7 @@ public class MPCSdk: NSObject {
      */
     public func computeMPCOperation(_ mpcData: NSString) -> Future<Void, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.backgroundHighPri().async(execute: {
                 do {
                     try self.sdk.computeMPCOperation(mpcData as String)
                     promise(Result.success(()))
@@ -105,7 +105,7 @@ public class MPCSdk: NSObject {
      */
     public func computePrepareDeviceArchiveMPCOperation(_ mpcData: NSString, passcode: NSString) -> Future<Void, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.backgroundHighPri().async(execute: {
                 do {
                     try self.sdk.computePrepareDeviceArchiveMPCOperation(mpcData as String, passcode: passcode as String)
                     promise(Result.success(()))
@@ -122,7 +122,7 @@ public class MPCSdk: NSObject {
      */
     public func computePrepareDeviceBackupMPCOperation(_ mpcData: NSString, passcode: NSString) -> Future<Void, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.backgroundHighPri().async(execute: {
                 do {
                     try self.sdk.computePrepareDeviceBackupMPCOperation(mpcData as String, passcode: passcode as String)
                     promise(Result.success(()))
@@ -139,7 +139,7 @@ public class MPCSdk: NSObject {
      */
     public func computeAddDeviceMPCOperation(_ mpcData: NSString, passcode: NSString, deviceBackup: NSString) -> Future<Void, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.backgroundHighPri().async(execute: {
                 do {
                     try self.sdk.computeAddDeviceMPCOperation(
                         mpcData as String,
@@ -161,7 +161,7 @@ public class MPCSdk: NSObject {
      */
     public func exportPrivateKeys(_ mpcKeyExportMetadata: NSString, passcode: NSString) -> Future<NSArray, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.backgroundHighPri().async(execute: {
                 do {
                     let response = try self.sdk.exportPrivateKeys(
                         mpcKeyExportMetadata as String,
@@ -183,7 +183,7 @@ public class MPCSdk: NSObject {
      */
     public func exportDeviceBackup() -> Future<String, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.backgroundHighPri().async(execute: {
                 self.sdk.exportDeviceBackup(goReturnsString(promise: promise, wrapAsError: self.wrapError))
             })
         }
diff --git a/ios/swift/WaasSdk/MPCWalletService.swift b/ios/swift/WaasSdk/MPCWalletService.swift
index df6c609..b8eb8b8 100644
--- a/ios/swift/WaasSdk/MPCWalletService.swift
+++ b/ios/swift/WaasSdk/MPCWalletService.swift
@@ -41,7 +41,7 @@ public class MPCWalletService: NSObject {
      */
     public func createMPCWallet(parent: NSString, device: NSString) -> Future<V1CreateMPCWalletResponse, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.backgroundHighPri().async(execute: {
                 do {
                     let response = try self.walletsClient.createMPCWallet(parent as String, device: device as String)
                     promise(Result.success(response))
@@ -58,7 +58,7 @@ public class MPCWalletService: NSObject {
      */
     public func waitPendingMPCWallet(operation: NSString) -> Future<V1MPCWallet, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 do {
                     let mpcWallet = try self.walletsClient.waitPendingMPCWallet(operation as String)
                     promise(Result.success(mpcWallet))
@@ -75,7 +75,7 @@ public class MPCWalletService: NSObject {
      */
     public func generateAddress(_ mpcWallet: NSString, network: NSString) -> Future<NSDictionary, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.backgroundHighPri().async(execute: {
                 do {
                     let addressData = try self.walletsClient.generateAddress(mpcWallet as String, network: network as String)
                     let res = try JSONSerialization.jsonObject(with: addressData) as? NSDictionary
@@ -92,7 +92,7 @@ public class MPCWalletService: NSObject {
      */
     public func getAddress(name: NSString) -> Future<NSDictionary, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 do {
                     let addressData = try self.walletsClient.getAddress(name as String)
                     let res = try JSONSerialization.jsonObject(with: addressData) as? NSDictionary
diff --git a/ios/swift/WaasSdk/PoolService.swift b/ios/swift/WaasSdk/PoolService.swift
index e8565ba..9608908 100644
--- a/ios/swift/WaasSdk/PoolService.swift
+++ b/ios/swift/WaasSdk/PoolService.swift
@@ -29,7 +29,7 @@ public class PoolService: NSObject {
      */
     public func createPool(displayName: NSString, poolID: NSString) -> Future<V1Pool, WaasError> {
         return Future() { promise in
-            DispatchQueue.main.async(execute: {
+            Job.background().async(execute: {
                 do {
                     let pool = try self.poolsClient.createPool(displayName as String, poolID: poolID as String)
                     promise(Result.success(pool))