diff --git a/fastlane/testflight.md b/fastlane/testflight.md
index 4bf34af2a..3a43679bd 100644
--- a/fastlane/testflight.md
+++ b/fastlane/testflight.md
@@ -115,16 +115,27 @@ This step validates most of your six Secrets and provides error messages if it d
 1. On the right side, click "Run Workflow", and tap the green `Run workflow` button.
 1. Wait, and within a minute or two you should see a green checkmark indicating the workflow succeeded.
 
-## Create App Group
+## Create Loop App Group
 
-If you have already built Loop via Xcode using this Apple ID, you can skip on to [Add App Group to Bundle Identifiers](#add-app-group-to-bundle-identifiers).
+If you have already built xDrip4iOS via Xcode using this Apple ID, you can skip on to [Add App Groups to Bundle Identifiers](#add-app-groups-to-bundle-identifiers).
+
+If you have already built Loop via Xcode using this Apple ID, you can skip on to [Create Trio App Group](#create-trio-app-group).
 
 1. Go to [Register an App Group](https://developer.apple.com/account/resources/identifiers/applicationGroup/add/) on the apple developer site.
 1. For Description, use "Loop App Group".
 1. For Identifier, enter "group.com.TEAMID.loopkit.LoopGroup", subsituting your team id for `TEAMID`.
 1. Click "Continue" and then "Register".
 
-## Add App Group to Bundle Identifiers
+## Create Trio App Group
+
+If you have already built Trio or xDrip4iOS via Xcode using this Apple ID, you can skip on to [Add App Groups to Bundle Identifiers](#add-app-groups-to-bundle-identifiers).
+
+1. Go to [Register an App Group](https://developer.apple.com/account/resources/identifiers/applicationGroup/add/) on the apple developer site.
+1. For Description, use "Trio App Group".
+1. For Identifier, enter "group.org.nightscout.TEAMID.trio.trio-app-group", subsituting your team id for `TEAMID`.
+1. Click "Continue" and then "Register".
+
+## Add App Groups to Bundle Identifiers
 
 Note 1 - If you previously built with Xcode, the `Names` listed below may be different, but the `Identifiers` will match. A table is provided below the steps to assist. The Add Identifier Action that you completed above generates 6 identifiers, but only 4 need to be modified as indicated in this step.
 
@@ -138,7 +149,8 @@ Note 2 - Depending on your build history, you may find some of the Identifiers a
     * xDrip Watch Complication Extension
 1. Click on the identifier's name.
 1. On the "App Groups" capabilies, click on the "Configure" button.
-1. Select the "Loop App Group" _(yes, "Loop App Group" is correct)_
+1. Select the "Loop App Group". _(yes, "Loop App Group" is correct)_
+1. For "xdripswift", also add the "Trio App Group" in addition to the "Loop App Group".
 1. Click "Continue".
 1. Click "Save".
 1. Click "Confirm".