Other React Native APIs

Adjust the log level

You can control the amount of log messages that show up from App Center. Log messages show in the console on iOS and LogCat on Android. Use the setLogLevel API to enable additional logging while debugging. The default level is LogLevel.ASSERT for the iOS App Store environment and Android release builds. Otherwise, it is set to LogLevel.WARNING.

To output all log messages, use LogLevel.VERBOSE.

import AppCenter from 'appcenter';

await AppCenter.setLogLevel(AppCenter.LogLevel.VERBOSE);


The JavaScript setLogLevel API can't increase logging for app startup code, before JavaScript is loaded.

If you wish to increase logging for app startup, use the native App Center setLogLevel APIs.

In iOS, call [MSAppCenter setLogLevel: MSLogLevelVerbose]; before any call to [AppCenterReactNative register]; (or AppCenterReactNativeAnalytics or AppCenterReactNativeCrashes or AppCenterReactNativePush) in the project's AppDelegate.m. You have to add @import AppCenter; if missing in that file.

In Android, call AppCenter.setLogLevel(android.util.Log.VERBOSE); before SoLoader.init in onCreate callback in MainApplication.java.

Identify installations

The App Center SDK creates a UUID for each device once the app is installed. This identifier remains the same for a device when the app is updated and a new one is generated only when the app is re-installed or the user manually deletes all app data on Android. The following API is useful for debugging purposes.

import AppCenter from 'appcenter';

const installId = await AppCenter.getInstallId();   // Returned as a string

Identify users

The App Center SDK supports setting a user ID that is used to augment crash reports. To use this capability:

  1. Configure the App Center SDK as described in the App Center SDK Getting started guide.
  2. Set a userID in the SDK using the following code:

After setting a user ID, you can use App Center's search feature to search for specific crash reports associated with the ID. Learn more in App Center's search documentation.


The value for the user ID is limited to 256 characters. It will be shown with your crash reports but not used for aggregation or counts of affected users. In case you set user ID multiple times, only the last user ID will be used. You need to set the user ID yourself before each application launch, because this value is not stored by the SDK between launches.

Disable all services at runtime

If you want to disable all App Center services at once, use the setEnabled() API. When disabled, the SDK will not forward any information to App Center.

import AppCenter from 'appcenter';

await AppCenter.setEnabled(false);

To enable all services at once again, use the same API but pass true as a parameter.

await AppCenter.setEnabled(true);

The state is persisted in the device's storage across application launches.

Change state of service in runtime

You can enable or disable desired service at the runtime with following code:

await AppCenter.Analytics.setEnabled(false);

Check if App Center is enabled

You can also check if App Center is enabled or not.

const enabled = await AppCenter.isEnabled();

Check App Center SDK version at runtime

You can get the version of App Center SDK that you are currently using.


Use custom properties

App Center allows you to define custom properties as key value pairs in your app. You may use custom properties for various purposes. For instance, you can use custom properties to segment your users, and then send push notifications to a specific audience.


Only devices that have Push successfully registered are matched in audiences. As a consequence, the iOS simulator can not be used to test audience matching.

You can set custom properties by calling the setCustomProperties() API. A valid key for custom property should match regular expression pattern ^[a-zA-Z][a-zA-Z0-9]*$. A custom property's value may be one of the following Javascript types: string, number, boolean and Date.

import AppCenter, {CustomProperties} from 'appcenter';

const properties = new CustomProperties();
properties.set('color', 'blue').set('score', 10);


If you set the same custom property more than once, previous values will be overwritten by the last one.

You may remove any custom property by calling the clear() API. This will only remove the value of the property for a device. It will not remove the property name from App Center portal.

import AppCenter, {CustomProperties} from 'appcenter';

const properties = new CustomProperties();