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.