diff --git a/app/src/main/java/io/timelimit/android/ui/payment/PurchaseFragment.kt b/app/src/main/java/io/timelimit/android/ui/payment/PurchaseFragment.kt
index 15c0981..fc65771 100644
--- a/app/src/main/java/io/timelimit/android/ui/payment/PurchaseFragment.kt
+++ b/app/src/main/java/io/timelimit/android/ui/payment/PurchaseFragment.kt
@@ -1,5 +1,5 @@
 /*
- * TimeLimit Copyright <C> 2019 - 2021 Jonas Lochmann
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -22,13 +22,14 @@ import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.LiveData
-import androidx.lifecycle.Observer
 import io.timelimit.android.R
 import io.timelimit.android.databinding.FragmentPurchaseBinding
 import io.timelimit.android.livedata.liveDataFromNullableValue
 import io.timelimit.android.livedata.mergeLiveData
 import io.timelimit.android.ui.MainActivity
+import io.timelimit.android.ui.diagnose.DiagnoseExceptionDialogFragment
 import io.timelimit.android.ui.main.FragmentWithCustomTitle
+import java.lang.RuntimeException
 
 class PurchaseFragment : Fragment(), FragmentWithCustomTitle {
     private val activityModel: ActivityPurchaseModel by lazy { (activity as MainActivity).purchaseModel }
@@ -87,7 +88,7 @@ class PurchaseFragment : Fragment(), FragmentWithCustomTitle {
                         binding.errorReason = when (fragmentStatus) {
                             PurchaseFragmentErrorBillingNotSupportedByDevice -> getString(R.string.purchase_error_not_supported_by_device)
                             PurchaseFragmentErrorBillingNotSupportedByAppVariant -> getString(R.string.purchase_error_not_supported_by_app_variant)
-                            PurchaseFragmentNetworkError -> getString(R.string.error_network)
+                            is PurchaseFragmentNetworkError -> getString(R.string.error_network)
                             PurchaseFragmentExistingPaymentError -> getString(R.string.purchase_error_existing_payment)
                             PurchaseFragmentServerRejectedError -> getString(R.string.purchase_error_server_rejected)
                             PurchaseFragmentServerHasDifferentPublicKey -> getString(R.string.purchase_error_server_different_key)
@@ -97,6 +98,12 @@ class PurchaseFragment : Fragment(), FragmentWithCustomTitle {
                             is PurchaseFragmentRecoverableError -> true
                             is PurchaseFragmentUnrecoverableError -> false
                         }
+
+                        binding.showErrorDetailsButton = when (fragmentStatus) {
+                            is PurchaseFragmentNetworkError -> true
+                            else -> false
+                        }
+
                         processingPurchaseError = false
                     }
                 }.let { }
@@ -114,6 +121,17 @@ class PurchaseFragment : Fragment(), FragmentWithCustomTitle {
                 }
             }
 
+            override fun showErrorDetails() {
+                val status = model.status.value
+
+                val exception = when (status) {
+                    is PurchaseFragmentNetworkError -> status.exception
+                    else -> RuntimeException("other error")
+                }
+
+                DiagnoseExceptionDialogFragment.newInstance(exception).show(parentFragmentManager)
+            }
+
             override fun buyForOneMonth() {
                 activityModel.startPurchase(PurchaseIds.SKU_MONTH, checkAtBackend = true, activity = requireActivity())
             }
@@ -131,6 +149,7 @@ class PurchaseFragment : Fragment(), FragmentWithCustomTitle {
 
 interface PurchaseFragmentHandlers {
     fun retryAtErrorScreenClicked()
+    fun showErrorDetails()
     fun buyForOneMonth()
     fun buyForOneYear()
 }
diff --git a/app/src/main/java/io/timelimit/android/ui/payment/PurchaseModel.kt b/app/src/main/java/io/timelimit/android/ui/payment/PurchaseModel.kt
index a296980..a42739e 100644
--- a/app/src/main/java/io/timelimit/android/ui/payment/PurchaseModel.kt
+++ b/app/src/main/java/io/timelimit/android/ui/payment/PurchaseModel.kt
@@ -1,5 +1,5 @@
 /*
- * TimeLimit Copyright <C> 2019 - 2021 Jonas Lochmann
+ * TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -78,7 +78,7 @@ class PurchaseModel(application: Application): AndroidViewModel(application) {
                 } catch (ex: BillingNotSupportedException) {
                     statusInternal.value = PurchaseFragmentErrorBillingNotSupportedByDevice
                 } catch (ex: Exception) {
-                    statusInternal.value = PurchaseFragmentNetworkError
+                    statusInternal.value = PurchaseFragmentNetworkError(ex)
                 }
             }
         }
@@ -95,7 +95,7 @@ sealed class PurchaseFragmentRecoverableError: PurchaseFragmentError()
 
 object PurchaseFragmentErrorBillingNotSupportedByDevice: PurchaseFragmentUnrecoverableError()
 object PurchaseFragmentErrorBillingNotSupportedByAppVariant: PurchaseFragmentUnrecoverableError()
-object PurchaseFragmentNetworkError: PurchaseFragmentRecoverableError()
+data class PurchaseFragmentNetworkError(val exception: Exception): PurchaseFragmentRecoverableError()
 object PurchaseFragmentExistingPaymentError: PurchaseFragmentUnrecoverableError()
 object PurchaseFragmentServerRejectedError: PurchaseFragmentUnrecoverableError()
 object PurchaseFragmentServerHasDifferentPublicKey: PurchaseFragmentUnrecoverableError()
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_purchase.xml b/app/src/main/res/layout/fragment_purchase.xml
index d149c34..540f47a 100644
--- a/app/src/main/res/layout/fragment_purchase.xml
+++ b/app/src/main/res/layout/fragment_purchase.xml
@@ -1,5 +1,5 @@
 <!--
-  TimeLimit Copyright <C> 2019 - 2021 Jonas Lochmann
+  TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation version 3 of the License.
@@ -30,6 +30,10 @@
             name="showRetryButton"
             type="Boolean" />
 
+        <variable
+            name="showErrorDetailsButton"
+            type="boolean" />
+
         <variable
             name="priceData"
             type="io.timelimit.android.ui.payment.PurchaseFragmentReady" />
@@ -149,6 +153,16 @@
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content" />
 
+                <Button
+                    style="?borderlessButtonStyle"
+                    android:layout_marginTop="4dp"
+                    android:visibility="@{showErrorDetailsButton ? View.VISIBLE : View.GONE}"
+                    android:onClick="@{() -> handlers.showErrorDetails()}"
+                    android:text="@string/generic_show_details"
+                    android:layout_gravity="center_horizontal"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content" />
+
             </LinearLayout>
 
         </RelativeLayout>
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 626c20c..7383029 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  TimeLimit Copyright <C> 2019 - 2021 Jonas Lochmann
+  TimeLimit Copyright <C> 2019 - 2022 Jonas Lochmann
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation version 3 of the License.
@@ -29,6 +29,7 @@
     <string name="generic_no">Nein</string>
     <string name="generic_yes">Ja</string>
     <string name="generic_skip">Überspringen</string>
+    <string name="generic_show_details">Details anzeigen</string>
 
     <string name="generic_swipe_to_dismiss">Sie können diesen Hinweis entfernen, indem Sie ihn zur Seite wischen</string>
     <string name="generic_runtime_permission_rejected">Berechtigung abgelehnt; Sie können die Berechtigungen in den Systemeinstellungen verwalten</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 3d24fad..570093b 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -32,6 +32,7 @@
     <string name="generic_no">No</string>
     <string name="generic_yes">Yes</string>
     <string name="generic_skip">Skip</string>
+    <string name="generic_show_details">Show details</string>
 
     <string name="generic_swipe_to_dismiss">Swipe to the side to remove this message</string>
     <string name="generic_runtime_permission_rejected">Permission rejected; You can manage permissions in the system settings</string>