diff --git a/PadelClub/Views/Navigation/Toolbox/APICallsListView.swift b/PadelClub/Views/Navigation/Toolbox/APICallsListView.swift
index 0382d5f..a934fe3 100644
--- a/PadelClub/Views/Navigation/Toolbox/APICallsListView.swift
+++ b/PadelClub/Views/Navigation/Toolbox/APICallsListView.swift
@@ -12,20 +12,27 @@ import PadelClubData
 struct APICallsListView: View {
     
     @State var descriptors: [CollectionDescriptor] = []
+    @State var total = 0
     
     var body: some View {
         
         List {
-            ForEach(self.descriptors) { descriptor in
-                
-                NavigationLink {
-                    if let syncedType = descriptor.type as? any SyncedStorable.Type {
-                        APICallsView(name: descriptor.name, type: syncedType)
+            Section {
+                LabeledContent("Total count", value: "\(total)")
+            }
+            
+            Section {
+                ForEach(self.descriptors) { descriptor in
+                    
+                    NavigationLink {
+                        if let syncedType = descriptor.type as? any SyncedStorable.Type {
+                            APICallsView(name: descriptor.name, type: syncedType)
+                        }
+                    } label: {
+                        LabeledContent(descriptor.name, value: descriptor.count.string)
                     }
-                } label: {
-                    LabeledContent(descriptor.name, value: descriptor.count.string)
+                    
                 }
-
             }
         }.onAppear {
             self.load()
@@ -49,6 +56,8 @@ struct APICallsListView: View {
     func loadCount<T: SyncedStorable>(_ type: T.Type, _ descriptor: CollectionDescriptor) async {
         let calls = await StoreCenter.main.apiCalls(type: type)
         descriptor.count = calls.count
+        
+        self.total = total + descriptor.count
 //        Logger.log("\(descriptor.name), count = \(calls.count)")
     }
     
diff --git a/PadelClub/Views/Navigation/Toolbox/DebugSettingsView.swift b/PadelClub/Views/Navigation/Toolbox/DebugSettingsView.swift
index 95ec2a3..874b833 100644
--- a/PadelClub/Views/Navigation/Toolbox/DebugSettingsView.swift
+++ b/PadelClub/Views/Navigation/Toolbox/DebugSettingsView.swift
@@ -10,6 +10,10 @@ import LeStorage
 import PadelClubData
 
 struct DebugSettingsView: View {
+    @State private var errorMessage: String?
+    @State private var showingError = false
+    @State private var isSynchronizing = false
+    
     var body: some View {
         List {
             
@@ -17,7 +21,19 @@ struct DebugSettingsView: View {
                 LabeledContent("Has Websocket Manager", value: self._hasWebSocketManager)
                 LabeledContent("Websocket ping", value: self._wsPingStatus)
                 LabeledContent("Websocket failure", value: self._wsFailure)
-                LabeledContent("Last sync date", value: self._lastSyncDate)
+                LabeledContent("Last synced object date", value: self._lastSyncDate)
+                if isSynchronizing {
+                    HStack {
+                        ProgressView()
+                            .scaleEffect(0.8)
+                        Text("Synchronizing...")
+                            .foregroundColor(.secondary)
+                    }
+                } else {
+                    Button("Synchronize") {
+                        self._synchronize()
+                    }
+                }
             }
             
             Section("Settings") {
@@ -40,6 +56,11 @@ struct DebugSettingsView: View {
 
             }
         }
+        .alert("Synchronization Error", isPresented: $showingError) {
+            Button("OK") { }
+        } message: {
+            Text(errorMessage ?? "An unknown error occurred")
+        }
     }
     
     fileprivate var _userId: String {
@@ -79,6 +100,29 @@ struct DebugSettingsView: View {
     fileprivate var _lastSyncDate: String {
         return "\(StoreCenter.main.lastSyncDate)"
     }
+    
+    fileprivate func _synchronize() {
+        Logger.log("launch sync...")
+        Task {
+            await MainActor.run {
+                isSynchronizing = true
+            }
+            
+            do {
+                try await StoreCenter.main.synchronizeLastUpdates()
+            } catch {
+                Logger.error(error)
+                await MainActor.run {
+                    errorMessage = error.localizedDescription
+                    showingError = true
+                }
+            }
+            
+            await MainActor.run {
+                isSynchronizing = false
+            }
+        }
+    }
 }
 
 struct DebugPurchaseView: View {