This document describes how to add and remove testers in App Distribution,
including the following tasks:
- [Add, remove, and search for testers in a Firebase project](https://firebase.google.com/docs/app-distribution/add-remove-search-testers.md.txt#add-remove-search-testers-project)
- [Add testers using invitation restrictions](https://firebase.google.com/docs/app-distribution/add-remove-search-testers.md.txt#add-using-invitation-restrictions)
- [Add and remove testers with the Firebase App Distribution API](https://firebase.google.com/docs/app-distribution/add-remove-search-testers.md.txt#add-remove-testers-api)
- [Add, remove, and search for testers in a group](https://firebase.google.com/docs/app-distribution/add-remove-search-testers.md.txt#add-remove-search-testers-group)
## Add, remove, and search for testers in a Firebase project
The search function lets you check for specific testers that you have added to
your Firebase project. If you have a large number of testers, you can quickly
search for individual testers, by their email address or name, using the search
bar at the top of the group's page. Note that the search function requires that
you know the email address or name of the tester that you are searching for.
You can add, remove, and search for testers in the **Testers \& Groups** tab of
the
[App Distribution page](https://console.firebase.google.com/project/_/appdistribution)
in the Firebase console.
To add a tester from the **Testers \& Groups** tab to your Firebase project:
1. Click the **Add tester** button next to the search bar.
2. Enter the tester's email address.
3. Click **Add tester**.
Your tester is now added to your Firebase project. To give the tester access
to a release, add the individual tester to a release or add the tester to a
group 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 an App Distribution group
To add more testers, request a no-cost
[limit increase](https://console.firebase.google.com/project/_/appdistribution/limits).
## Add testers using invitation restrictions
You can use the **Restrict invitation acceptance to recipient's email** toggle
in the **Testers \& Groups** tab to add a restriction on which emails your
testers can use to accept testing invitations.
This toggle will require testers to accept invitations using the Google Account
with the same email address that they received the invitation. By default, this
toggle is disabled.
## Add and remove testers with the Firebase App Distribution API
You can use the `testers.batchAdd` and `testers.batchRemove` endpoints in the
[Firebase App Distribution API](https://firebase.google.com/docs/reference/app-distribution/rest.md.txt)
to add or remove testers from App Distribution using an HTTP request to the
App 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 a
group. If you have a large number of groups, you can quickly search for
individual testers, by their email address or name, using the search bar at the
top of the group's page. Note that the search function requires that you know
the email address or name of the tester that you are searching for.
You can add, remove, and search for testers from groups in the **Testers \&
Groups** tab of the [App Distribution
page](https://console.firebase.google.com/project/_/appdistribution) in the
Firebase console. Groups are useful for managing access to releases for a large
number of testers. For example, you could create a group to grant a small group
of testers access to an early release of an app. Once you implement feedback
from the initial tester group, you can create a group for a larger number of
testers.
To add a tester to a specific group, follow these steps:
1. Click the group's name.
2. Click the **Add testers** button next to the search bar.
3. Enter the tester's email address.
4. Click **Add tester**.
When you add or remove testers from a group, those testers gain or lose
access to *all 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 from *all* releases that they had access to *exclusively* using the group from which they were removed.
- If the tester is a member of a different group which also has access to a release, 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 all
releases that they had access to exclusively using that group. In most cases,
group deletion occurs almost immediately; but if you have a large number of
testers and releases, the group delete can take longer. After you
delete a group, it is no longer listed in the App Distribution page of the
Firebase console.
Deleting a group may not take effect immediately; after you
delete a group you might temporarily see individual testers from the deleted
group listed as having access to a specific release.
## Next steps
- [Import testers from CSV files](https://firebase.google.com/docs/app-distribution/import-testers-csv-files.md.txt).
- To learn how to increase your internal testing base, see [Create invite links](https://firebase.google.com/docs/app-distribution/create-invite-links.md.txt).
- To register additional iOS devices manually or programmatically, see
[Register additional iOS devices](https://firebase.google.com/docs/app-distribution/register-additional-devices.md.txt).