diff --git a/AugendiagnoseIdea/augendiagnoseLib/src/main/java/de/jeisfeld/augendiagnoselib/activities/StandardActivity.java b/AugendiagnoseIdea/augendiagnoseLib/src/main/java/de/jeisfeld/augendiagnoselib/activities/StandardActivity.java
index e8bc0959..ac1e6d9f 100644
--- a/AugendiagnoseIdea/augendiagnoseLib/src/main/java/de/jeisfeld/augendiagnoselib/activities/StandardActivity.java
+++ b/AugendiagnoseIdea/augendiagnoseLib/src/main/java/de/jeisfeld/augendiagnoselib/activities/StandardActivity.java
@@ -11,6 +11,7 @@
 import android.support.annotation.Nullable;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.content.ContextCompat;
+import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 
@@ -141,19 +142,22 @@ public void onDialogNegativeClick(final DialogFragment dialog) {
 					checkUnlockerApp();
 
 					// Check in-app purchases
-					GoogleBillingHelper.initialize(this, new OnInventoryFinishedListener() {
-
-						@Override
-						public void handleProducts(final List<PurchasedSku> purchases, final List<SkuDetails> availableProducts,
-												   final boolean isPremium) {
-							PreferenceUtil.setSharedPreferenceBoolean(R.string.key_internal_has_premium_pack, isPremium);
-							if (isPremium) {
-								invalidateOptionsMenu();
+					try {
+						GoogleBillingHelper.initialize(this, new OnInventoryFinishedListener() {
+							@Override
+							public void handleProducts(final List<PurchasedSku> purchases, final List<SkuDetails> availableProducts,
+													   final boolean isPremium) {
+								PreferenceUtil.setSharedPreferenceBoolean(R.string.key_internal_has_premium_pack, isPremium);
+								if (isPremium) {
+									invalidateOptionsMenu();
+								}
+								GoogleBillingHelper.dispose();
 							}
-							GoogleBillingHelper.dispose();
-						}
-					});
-
+						});
+					}
+					catch (Exception e) {
+						Log.e(Application.TAG, "Failed to call Google Billing Helper", e);
+					}
 				}
 			}
 		}
@@ -230,7 +234,20 @@ else if (itemId == R.id.action_camera) {
 		}
 		else if (itemId == R.id.action_purchase) {
 			DialogUtil.displayToast(this, R.string.message_dialog_triggering_purchase);
-			triggerDefaultPurchase();
+			try {
+				triggerDefaultPurchase();
+			}
+			catch (Exception e) {
+				Log.e(Application.TAG, "Failed to call Google Billing Helper", e);
+				Intent googlePlayIntent = new Intent(Intent.ACTION_VIEW);
+				googlePlayIntent.setData(Uri.parse("market://details?id=de.jeisfeld.augendiagnoseunlocker"));
+				try {
+					startActivity(googlePlayIntent);
+				}
+				catch (Exception e1) {
+					DialogUtil.displayError(this, R.string.message_dialog_failed_to_open_google_play, false);
+				}
+			}
 			return true;
 		}
 		else if (itemId == R.id.action_rating) {
diff --git a/AugendiagnoseIdea/augendiagnoseLib/src/main/java/de/jeisfeld/augendiagnoselib/fragments/SettingsFragment.java b/AugendiagnoseIdea/augendiagnoseLib/src/main/java/de/jeisfeld/augendiagnoselib/fragments/SettingsFragment.java
index 8641b18f..e01cba40 100644
--- a/AugendiagnoseIdea/augendiagnoseLib/src/main/java/de/jeisfeld/augendiagnoselib/fragments/SettingsFragment.java
+++ b/AugendiagnoseIdea/augendiagnoseLib/src/main/java/de/jeisfeld/augendiagnoselib/fragments/SettingsFragment.java
@@ -237,7 +237,12 @@ else if (mType.equals(getActivity().getString(R.string.key_dummy_screen_premium_
 	 * Initialize Google Billing (after having permission).
 	 */
 	public final void initializeGoogleBilling() {
-		GoogleBillingHelper.initialize(getActivity(), mOnInventoryFinishedListener);
+		try {
+			GoogleBillingHelper.initialize(getActivity(), mOnInventoryFinishedListener);
+		}
+		catch (Exception e) {
+			android.util.Log.e(Application.TAG, "Failed to call Google Billing Helper", e);
+		}
 	}
 
 	/**