diff --git a/NucleicRemote/NucleicRemote/HeartbeatReporter.swift b/NucleicRemote/NucleicRemote/HeartbeatReporter.swift
index a9a5701..182d8be 100644
--- a/NucleicRemote/NucleicRemote/HeartbeatReporter.swift
+++ b/NucleicRemote/NucleicRemote/HeartbeatReporter.swift
@@ -2,7 +2,7 @@ import Foundation
 import Security
 import NucleicProtocol
 
-/// Sends the iPhone client's anonymous DAU heartbeat at most once per day
+/// Sends the iPhone client's anonymous DAI (daily active installs) heartbeat at most once per day
 /// (`docs/CLOUD_INFRA.md` §4). Opt-out (default on) via `HeartbeatSettings`; debug builds never
 /// report. The install ID is a random UUID kept only in the Keychain, deliberately **separate**
 /// from the device's Noise identity (`IdentityStore`) so telemetry can't be correlated with it.
diff --git a/NucleicRemote/NucleicRemote/NucleicRemoteApp.swift b/NucleicRemote/NucleicRemote/NucleicRemoteApp.swift
index a41ede2..4d5fd12 100644
--- a/NucleicRemote/NucleicRemote/NucleicRemoteApp.swift
+++ b/NucleicRemote/NucleicRemote/NucleicRemoteApp.swift
@@ -15,7 +15,7 @@ struct NucleicRemoteApp: App {
                     // Surface the notifications prompt + register for APNS. The token rides along
                     // in the sync Hello; the relay uses it to wake the phone for approvals (§3).
                     PushRegistrar.shared.requestAuthorizationAndRegister()
-                    // Anonymous, opt-out, once-a-day DAU heartbeat (docs/CLOUD_INFRA.md §4).
+                    // Anonymous, opt-out, once-a-day DAI heartbeat (docs/CLOUD_INFRA.md §4).
                     Task { await HeartbeatReporter.reportIfDue() }
                 }
                 // Re-check on every foreground so a new active day is counted.