diff --git a/src/app/api/insights/cards/route.ts b/src/app/api/insights/cards/route.ts
index f070aa305..dd7052852 100644
--- a/src/app/api/insights/cards/route.ts
+++ b/src/app/api/insights/cards/route.ts
@@ -77,6 +77,7 @@ export const GET = apiHandler(async () => {
           in: ["WEIGHT", "BLOOD_PRESSURE_SYS", "BLOOD_PRESSURE_DIA", "PULSE"],
         },
         measuredAt: { gte: ninetyDaysAgo },
+        deletedAt: null,
       },
       orderBy: { measuredAt: "asc" },
       select: { type: true, value: true, measuredAt: true },
diff --git a/src/app/api/insights/generate/route.ts b/src/app/api/insights/generate/route.ts
index 96c7e3413..eee951223 100644
--- a/src/app/api/insights/generate/route.ts
+++ b/src/app/api/insights/generate/route.ts
@@ -134,7 +134,7 @@ async function buildComparisonSnapshotForUser(
   const rows = await Promise.all(
     types.map(async (type) => {
       const measurements = await prisma.measurement.findMany({
-        where: { userId, type },
+        where: { userId, type, deletedAt: null },
         orderBy: { measuredAt: "asc" },
         select: { measuredAt: true, value: true },
       });
diff --git a/src/app/api/insights/targets/route.ts b/src/app/api/insights/targets/route.ts
index c613fbd32..46e195659 100644
--- a/src/app/api/insights/targets/route.ts
+++ b/src/app/api/insights/targets/route.ts
@@ -178,11 +178,15 @@ async function buildTargetsResponse(user: AuthedUser) {
   const thirtyDaysAgo = new Date(Date.now() - 30 * 24 * 60 * 60 * 1000);
 
   // Fetch all measurements in the last 30 days + the latest for each type
+  // Soft-delete filter mirrors the W-DELETED pattern: tombstoned rows
+  // must not contribute to tile averages / latest values once iOS sync
+  // starts emitting deletions.
   const recentMeasurements = await prisma.measurement.findMany({
     where: {
       userId,
       type: { in: types },
       measuredAt: { gte: thirtyDaysAgo },
+      deletedAt: null,
     },
     orderBy: { measuredAt: "desc" },
     select: { type: true, value: true, measuredAt: true },
@@ -207,6 +211,7 @@ async function buildTargetsResponse(user: AuthedUser) {
       userId,
       type: { in: types },
       measuredAt: { gte: oneYearAgo },
+      deletedAt: null,
     },
     orderBy: { measuredAt: "desc" },
     distinct: ["type"],
@@ -1193,7 +1198,7 @@ async function buildTargetsResponse(user: AuthedUser) {
   };
   const thirtyDaysAgoGlucose = new Date(Date.now() - 30 * 24 * 60 * 60 * 1000);
   const glucoseRows = await prisma.measurement.findMany({
-    where: { userId, type: "BLOOD_GLUCOSE" },
+    where: { userId, type: "BLOOD_GLUCOSE", deletedAt: null },
     orderBy: { measuredAt: "desc" },
     select: { value: true, measuredAt: true, glucoseContext: true },
   });
diff --git a/src/lib/insights/features.ts b/src/lib/insights/features.ts
index b77b53d52..d0e168481 100644
--- a/src/lib/insights/features.ts
+++ b/src/lib/insights/features.ts
@@ -377,8 +377,8 @@ export async function extractFeatures(
       : null;
   const measurements = await prisma.measurement.findMany({
     where: sinceCutoff
-      ? { userId, measuredAt: { gte: sinceCutoff } }
-      : { userId },
+      ? { userId, measuredAt: { gte: sinceCutoff }, deletedAt: null }
+      : { userId, deletedAt: null },
     orderBy: { measuredAt: "asc" },
   });
 
diff --git a/src/lib/insights/glp1-plateau.ts b/src/lib/insights/glp1-plateau.ts
index e452c95f7..539ce74c5 100644
--- a/src/lib/insights/glp1-plateau.ts
+++ b/src/lib/insights/glp1-plateau.ts
@@ -74,6 +74,7 @@ export async function detectGlp1Plateau(
       userId,
       type: "WEIGHT",
       measuredAt: { gte: windowStart },
+      deletedAt: null,
     },
     orderBy: { measuredAt: "asc" },
     select: { value: true, measuredAt: true },
diff --git a/src/lib/insights/pulse-status.ts b/src/lib/insights/pulse-status.ts
index a5a5887ac..5dcb595a9 100644
--- a/src/lib/insights/pulse-status.ts
+++ b/src/lib/insights/pulse-status.ts
@@ -158,6 +158,7 @@ export async function generatePulseStatusForUser(
     where: {
       userId,
       type: "PULSE",
+      deletedAt: null,
     },
     orderBy: { measuredAt: "desc" },
     take: 365,