diff --git a/aggregates.yaml b/aggregates.yaml
index 25a514d..5c0524f 100644
--- a/aggregates.yaml
+++ b/aggregates.yaml
@@ -38,3 +38,19 @@ aggregates:
       kept: { event: kept }
     transitions:
       open: [removed, kept]
+  # TestFlight beta signups (index.yaml's "Test it on your iPhone").
+  # Attended by automation, not a human desk: a new "requested" signup
+  # is handed to the App Store Connect API to invite the Apple ID to the
+  # closed beta; "withdrawn" (the /joined-testers self-transition) drops
+  # them from the invite list.
+  - bucket: redoal_testers
+    attended_by: >
+      n8n TestFlight onboarding workflow — ops/n8n/testflight-onboarding
+      in redoal/redoal. Consumes NATS events.redoal_testers.* and calls
+      App Store Connect POST /v1/betaTesters.
+    initial: open
+    states:
+      open: { event: requested }
+      withdrawn: { event: withdrawn }
+    transitions:
+      open: [withdrawn]
diff --git a/questions/index.yaml b/questions/index.yaml
index c8cdcbc..b3ec657 100644
--- a/questions/index.yaml
+++ b/questions/index.yaml
@@ -119,7 +119,13 @@ alternatives:
   - name: Follow the build as it lands
     description: >
       The network as it is being built — and we need collaborators on
-      every new surface it grows.
+      every new surface it grows. Desktop releases run free; the iPhone
+      build is a closed beta you can ask into below.
+    action: /joined-testers
+    consequence: [Request a TestFlight invite]
+    record_as: redoal_testers
+    encouragements:
+      - Watch your mail for the TestFlight invite.
     features:
       - name: Communicate
         description: >
@@ -144,6 +150,19 @@ alternatives:
           jq: >
             .[] | {name: .name, description: .body, tag: .tag_name,
             published: .published_at, url: null}
+      - name: Join the public testers
+        description: >
+          The desktop releases above run free, no sign-up. The iPhone
+          build rides TestFlight (Apple's closed beta), so it needs the
+          Apple ID you use with the App Store — leave it and we'll send
+          an invite.
+        icon: lucide:smartphone
+        requirements:
+          - name: name
+            label: Name
+          - name: email
+            label: Apple ID email
+            type: email
 
   - name: Hear from us when it matters
     description: >
@@ -166,3 +185,4 @@ alternatives:
           - name: email
             label: Email
             type: email
+
diff --git a/questions/joined-testers.yaml b/questions/joined-testers.yaml
new file mode 100644
index 0000000..d6c8f77
--- /dev/null
+++ b/questions/joined-testers.yaml
@@ -0,0 +1,30 @@
+id: /joined-testers
+route: ^/joined-testers
+followup: true
+name: What happens next?
+description: >
+  You asked for a place in the closed beta — here's the shape of it.
+alternatives:
+  - name: Your invite is on its way
+    description: ""
+    features:
+      - name: Check your mail
+        description: >
+          A TestFlight invite goes to the Apple ID you left. Tap it on
+          your iPhone, install TestFlight if you don't have it, and
+          redoal lands on your home screen.
+        icon: lucide:mail
+      - name: It's rough on purpose
+        description: >
+          A beta, and an artwork before a product — the networked edges
+          are where the interesting questions live. Tell us what breaks.
+        icon: lucide:hammer
+
+  - name: Withdraw from the beta
+    description: >
+      Changed your mind? Confirm below and we'll drop your Apple ID from
+      the invite list.
+    self_transition:
+      bucket: redoal_testers
+      to: withdrawn
+      label: Remove me from the beta