diff --git a/apps/journal/app/entry.server.tsx b/apps/journal/app/entry.server.tsx
index ff195e8..6d7ae09 100644
--- a/apps/journal/app/entry.server.tsx
+++ b/apps/journal/app/entry.server.tsx
@@ -9,13 +9,14 @@ import { renderToPipeableStream } from "react-dom/server";
 import { initI18nServer, detectLanguage } from "@trails-cool/i18n";
 
 const sentryEnvironment = process.env.CI ? "ci" : (process.env.NODE_ENV ?? "development");
+const sentryEnabled = process.env.NODE_ENV === "production" && !process.env.CI;
 
 Sentry.init({
   dsn: "https://a32ffcc575d34be072e91b20f247eeee@o4509530546634752.ingest.de.sentry.io/4509530555547728",
   release: process.env.SENTRY_RELEASE,
   environment: sentryEnvironment,
   tracesSampleRate: 1.0,
-  enabled: process.env.NODE_ENV === "production" && !process.env.CI,
+  enabled: sentryEnabled,
   sendDefaultPii: false,
   beforeSend(event) {
     // Drop 404s — they're expected (scanners, typos), not bugs
@@ -25,6 +26,10 @@ Sentry.init({
   },
 });
 
+if (!sentryEnabled && !process.env.CI) {
+  console.debug(`[sentry] journal SSR init inert (env=${sentryEnvironment}); would send to Sentry in production`);
+}
+
 export const streamTimeout = 5_000;
 
 export default function handleRequest(
diff --git a/apps/journal/app/lib/sentry.client.ts b/apps/journal/app/lib/sentry.client.ts
index d2e6dac..9c39f7b 100644
--- a/apps/journal/app/lib/sentry.client.ts
+++ b/apps/journal/app/lib/sentry.client.ts
@@ -10,6 +10,7 @@ export function initSentryClient() {
 
   const sentryEnvironment = import.meta.env.VITE_SENTRY_ENVIRONMENT ??
     (import.meta.env.PROD ? "production" : "development");
+  const enabled = import.meta.env.PROD && sentryEnvironment !== "ci";
 
   Sentry.init({
     dsn: "https://a32ffcc575d34be072e91b20f247eeee@o4509530546634752.ingest.de.sentry.io/4509530555547728",
@@ -24,7 +25,14 @@ export function initSentryClient() {
     ],
     environment: sentryEnvironment,
     tracesSampleRate: sentryEnvironment === "ci" ? 0 : 1.0,
-    enabled: import.meta.env.PROD && sentryEnvironment !== "ci",
+    enabled,
     sendDefaultPii: false,
+    // Session Replay is not installed; document the intent explicitly.
+    replaysSessionSampleRate: 0,
+    replaysOnErrorSampleRate: 0,
   });
+
+  if (!enabled && !import.meta.env.PROD) {
+    console.debug(`[sentry] journal client init inert (env=${sentryEnvironment}); would send to Sentry in production`);
+  }
 }
diff --git a/apps/mobile/lib/sentry.ts b/apps/mobile/lib/sentry.ts
index 21be91a..67238bd 100644
--- a/apps/mobile/lib/sentry.ts
+++ b/apps/mobile/lib/sentry.ts
@@ -3,12 +3,20 @@ import * as Sentry from "@sentry/react-native";
 const SENTRY_DSN = "https://af50ac7aea803216adbe21e9dd4b896b@o4509530546634752.ingest.de.sentry.io/4511209742532688";
 
 export function initSentry() {
+  const enabled = !__DEV__;
   Sentry.init({
     dsn: SENTRY_DSN,
     tracesSampleRate: __DEV__ ? 0 : 1.0,
-    enabled: !__DEV__,
+    enabled,
     sendDefaultPii: false,
+    // Session Replay is not installed; document the intent explicitly.
+    replaysSessionSampleRate: 0,
+    replaysOnErrorSampleRate: 0,
   });
+
+  if (!enabled) {
+    console.debug("[sentry] mobile init inert in dev; would send to Sentry in production");
+  }
 }
 
 export { Sentry };
diff --git a/apps/planner/server.ts b/apps/planner/server.ts
index c07cb70..89be908 100644
--- a/apps/planner/server.ts
+++ b/apps/planner/server.ts
@@ -11,13 +11,14 @@ import { expireSessionsJob } from "./app/jobs/expire-sessions.ts";
 import postgres from "postgres";
 
 const sentryEnvironment = process.env.CI ? "ci" : (process.env.NODE_ENV ?? "development");
+const sentryEnabled = process.env.NODE_ENV === "production" && !process.env.CI;
 
 Sentry.init({
   dsn: "https://5215134cd78d5e6c199e29300b8425af@o4509530546634752.ingest.de.sentry.io/4511102546608208",
   release: process.env.SENTRY_RELEASE,
   environment: sentryEnvironment,
   tracesSampleRate: 1.0,
-  enabled: process.env.NODE_ENV === "production" && !process.env.CI,
+  enabled: sentryEnabled,
   beforeSend(event) {
     const serialized = event.extra?.__serialized__ as Record<string, unknown> | undefined;
     if (serialized?.status === 404) return null;
@@ -25,6 +26,10 @@ Sentry.init({
   },
 });
 
+if (!sentryEnabled && !process.env.CI) {
+  console.debug(`[sentry] planner server init inert (env=${sentryEnvironment}); would send to Sentry in production`);
+}
+
 const port = Number(process.env.PORT ?? 3001);
 const CLIENT_DIR = resolve(import.meta.dirname, "build", "client");