This document describes how to add and remove testers inApp Distribution, includingthe following tasks:

• Add, remove, and search for testers in a Firebase project
• Add testers using invitation restrictions
• Add and remove testers with theFirebase App Distribution API
• Add, remove, and search for testers in a group

Add, remove, and search for testers in a Firebase project

The search function lets you check for specific testers that you have added toyour Firebase project. If you have a large number of testers, you can quicklysearch for individual testers, by their email address or name, using the searchbar at the top of the group's page. Note that the search function requires thatyou know the email address or name of the tester that you are searching for.

You can add, remove, and search for testers in theTesters & Groups tab oftheApp Distribution pagein the Firebase console.

To add a tester from theTesters & Groups tab to your Firebase project:

1. Click theAdd tester button next to the search bar.
2. Enter the tester's email address.
3. ClickAdd tester.

Your tester is now added to your Firebase project. To give the tester accessto a release, add the individual tester to a release or add the tester to agroup that has access to a release.

Tester limits

Firebase App Distribution has the following tester limits:

• Add a maximum of 500 testers to a Firebase project

• Add a maximum of 200 testers to anApp Distribution group

To add more testers, request a no-costlimit increase.

Add testers using invitation restrictions

You can use theRestrict invitation acceptance to recipient's email togglein theTesters & Groups tab to add a restriction on which emails yourtesters can use to accept testing invitations.

This toggle will require testers to accept invitations using the Google Accountwith the same email address that they received the invitation. By default, thistoggle is disabled.

Add and remove testers with theFirebase App Distribution API

You can use thetesters.batchAdd andtesters.batchRemove endpoints in theFirebase App Distribution APIto add or remove testers from App Distribution using an HTTP request to theApp Distribution API.

Add, remove, and search for testers from a group

The search function lets you check for specific testers that you have added to agroup. If you have a large number of groups, you can quickly search forindividual testers, by their email address or name, using the search bar at thetop of the group's page. Note that the search function requires that you knowthe email address or name of the tester that you are searching for.

You can add, remove, and search for testers from groups in theTesters &Groups tab of theApp Distributionpage in theFirebase console. Groups are useful for managing access to releases for a largenumber of testers. For example, you could create a group to grant a small groupof testers access to an early release of an app. Once you implement feedbackfrom the initial tester group, you can create a group for a larger number oftesters.

To add a tester to a specific group, follow these steps:

1. Click the group's name.
2. Click theAdd testers button next to the search bar.
3. Enter the tester's email address.
4. ClickAdd tester.

When you add or remove testers from a group, those testers gain or loseaccess toall of the releases which were distributed to that group.

Remove a tester from a group

When you remove a tester from a group:

• The tester is removed fromall releases that they had accesstoexclusively via the group from which they were removed.
• If the tester is a member of a different group which also has access to arelease, the tester retains access to that release.

Delete a group

When you delete a group, all of the testers in that group are removed from allreleases that they had access to exclusively via that group. In most cases,group deletion occurs almost immediately; but if you have a large number oftesters and releases, the group delete can take longer. After youdelete a group, it is no longer listed in theApp Distribution page of theFirebase console.

Deleting a group may not take effect immediately; after youdelete a group you might temporarily see individual testers from the deletedgroup listed as having access to a specific release.

Next steps

• Import testers from CSV files.

• To learn how to increase your internal testing base, seeCreate invite links.

• To register additional iOS devices manually or programmatically, seeRegister additional iOS devices.