Batch offers two solutions in case you need to target specific user IDs: 

Send real-time notifications using the Transactional API

The Transactional API is made for 1-to-1 or 1-to-few interactions. It allows you to send push notifications to a specific list of IDs (push tokens, Advertising IDs or Custom User IDs) based on events in your back-end.

Use it to send action-oriented or time-sensitive push notifications.

  • Action-oriented notifications: New message, friend request, reached credit limit, user's turn in a game, etc.
  • Time-sentitive notifications: Delivered order, delayed flight, canceled train, etc.

You will find more information on the Transactional API here:

Create and target segments using Batch's Custom Audiences

Custom audiences allow you upload static segments exported from your userbase (e.g. top 500 buyers, etc) or created by third-party tools. You can easily retarget these custom audiences with a push or an In-App campaign from the dashboard.

You can easily create a custom audience by uploading a .txt or .csv file from the dashboard settings > "Audiences" tab:

You can also create and update audiences remotely, using the Custom Audience API.

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