diff --git a/messages/de.json b/messages/de.json
index 13c06e9c1..27eedcaca 100644
--- a/messages/de.json
+++ b/messages/de.json
@@ -2627,9 +2627,6 @@
     "moodStability": "Stimmungsstabilität",
     "steps": "Schritte",
     "average30d": "30-Tage-Schnitt:",
-    "deltaVsLastMonth": "{delta} {unit} vs. Vormonat",
-    "deltaVsLastMonthFlat": "± 0 {unit} vs. Vormonat",
-    "deltaUnavailable": "Zu wenige Werte für einen Vormonats-Vergleich",
     "currentValue": "Aktuell: {value} {unit}",
     "targetRangeValue": "Zielbereich: {min}–{max} {unit}",
     "sourceLabel": "Quelle: {source}",
diff --git a/messages/en.json b/messages/en.json
index 383e3300f..97991c1e7 100644
--- a/messages/en.json
+++ b/messages/en.json
@@ -2627,9 +2627,6 @@
     "moodStability": "Mood stability",
     "steps": "steps",
     "average30d": "30-day average:",
-    "deltaVsLastMonth": "{delta} {unit} vs. last month",
-    "deltaVsLastMonthFlat": "± 0 {unit} vs. last month",
-    "deltaUnavailable": "Not enough data for a vs.-last-month comparison",
     "currentValue": "Current: {value} {unit}",
     "targetRangeValue": "Target: {min}–{max} {unit}",
     "sourceLabel": "Source: {source}",
diff --git a/src/app/__tests__/targets-sparkline.test.tsx b/src/app/__tests__/targets-sparkline.test.tsx
deleted file mode 100644
index ce74403ed..000000000
--- a/src/app/__tests__/targets-sparkline.test.tsx
+++ /dev/null
@@ -1,123 +0,0 @@
-import { describe, expect, it, vi } from "vitest";
-import { renderToStaticMarkup } from "react-dom/server";
-
-/**
- * v1.4.22 C1 — `/targets` (Zielwerte) page upgrade.
- *
- * Each target card grew a 30-day sparkline + a "Δ vs. last month"
- * caption so the page reads as a living health log instead of a
- * static reference card. The API ships `points30d: number[]` and
- * `deltaVsLastMonth: number` per target; the page renders a tiny
- * dependency-free SVG path plus the localised delta caption.
- *
- * Cards without enough data (fewer than 3 points in either window)
- * keep their previous v1.4.19 layout — sparkline and delta caption
- * stay absent so cold-start accounts don't see a misleading flat
- * trace or a "± 0" comparison that's really "no comparison".
- */
-
-vi.mock("next/navigation", () => ({
-  useRouter: () => ({ push: vi.fn(), replace: vi.fn() }),
-  usePathname: () => "/targets",
-}));
-
-const sampleData = {
-  targets: [
-    {
-      type: "WEIGHT",
-      label: "Weight",
-      current: 88.2,
-      average30: 88.6,
-      trend: "stable",
-      unit: "kg",
-      range: { min: 60, max: 80 },
-      classification: { category: "Normal", color: "#50fa7b" },
-      source: "WHO BMI",
-      points30d: [89.0, 88.8, 88.6, 88.4, 88.2],
-      deltaVsLastMonth: -2.3,
-    },
-    {
-      type: "PULSE",
-      label: "Resting pulse",
-      current: 72,
-      average30: 72,
-      trend: "stable",
-      unit: "bpm",
-      range: { min: 60, max: 100 },
-      classification: { category: "On target", color: "#50fa7b" },
-      source: "AHA",
-      // No sparkline yet — cold-start account with <3 readings.
-      points30d: null,
-      deltaVsLastMonth: null,
-    },
-  ],
-  bpDiastolic: { current: null, average30: null, range: null },
-  profile: { heightCm: 180, age: 35, gender: "MALE", glucoseUnit: null },
-};
-
-vi.mock("@tanstack/react-query", () => ({
-  useQuery: () => ({
-    data: sampleData,
-    isLoading: false,
-    isError: false,
-    refetch: vi.fn(),
-  }),
-}));
-
-vi.mock("@/hooks/use-auth", () => ({
-  useAuth: () => ({
-    user: {
-      id: "u1",
-      username: "tester",
-      email: "tester@example.com",
-      role: "USER",
-    },
-    isAuthenticated: true,
-    isLoading: false,
-    refetch: vi.fn(),
-  }),
-}));
-
-import { I18nProvider } from "@/lib/i18n/context";
-import TargetsPage from "../targets/page";
-
-function render(locale: "en" | "de" = "en") {
-  return renderToStaticMarkup(
-    <I18nProvider initialLocale={locale}>
-      <TargetsPage />
-    </I18nProvider>,
-  );
-}
-
-describe("/targets page — sparkline + delta", () => {
-  it("renders a sparkline SVG for cards with points30d", () => {
-    const html = render();
-    // The sparkline carries a stable data-slot the visual test pins.
-    expect(html).toContain('data-slot="target-sparkline"');
-    // Path with the dracula-purple token, not a hardcoded hex.
-    expect(html).toContain("var(--dracula-purple)");
-  });
-
-  it("renders the Δ-vs-last-month caption with the signed delta", () => {
-    const html = render();
-    expect(html).toContain('data-slot="target-delta"');
-    // Weight: −2.3 kg vs. last month
-    expect(html).toMatch(/−2\.3\s*kg/);
-    expect(html).toContain("vs. last month");
-  });
-
-  it("uses German vs.-Vormonat caption when the locale is `de`", () => {
-    const html = render("de");
-    expect(html).toContain("vs. Vormonat");
-  });
-
-  it("skips both sparkline and delta when the target has no points", () => {
-    const html = render();
-    // PULSE card has no points30d / no deltaVsLastMonth — only ONE
-    // `target-sparkline` slot should be present (from the WEIGHT card).
-    const sparklineMatches = html.match(/data-slot="target-sparkline"/g) ?? [];
-    expect(sparklineMatches.length).toBe(1);
-    const deltaMatches = html.match(/data-slot="target-delta"/g) ?? [];
-    expect(deltaMatches.length).toBe(1);
-  });
-});
diff --git a/src/app/api/insights/targets/route.ts b/src/app/api/insights/targets/route.ts
index 7c77c54aa..3f516337c 100644
--- a/src/app/api/insights/targets/route.ts
+++ b/src/app/api/insights/targets/route.ts
@@ -14,7 +14,6 @@ import {
 import { calculateCompliance } from "@/lib/analytics/compliance";
 import { pairByTimestamp } from "@/lib/analytics/correlations";
 import { isBpReadingInTarget } from "@/lib/analytics/bp-in-target";
-import { berlinDayKey } from "@/lib/analytics/berlin-day";
 import {
   classifyPulseByTarget,
   getPersonalizedPulseTarget,
@@ -57,19 +56,6 @@ interface TargetItem {
   range: { min: number; max: number } | null;
   classification: { category: string; color: string } | null;
   source: string;
-  /**
-   * v1.4.22 C1 — sparkline support on the Zielwerte page. `points30d`
-   * is the last 30 days of values (chronological, oldest → newest) for
-   * the target's primary metric, rounded to one decimal. Derived metrics
-   * (BMI, BP-in-target, mood stability, glucose-by-context) skip the
-   * field when the page already renders a richer status surface.
-   * `deltaVsLastMonth` is the signed difference between the current
-   * 30-day average and the prior 30-day average (current − prior),
-   * null when either window has fewer than 3 points to keep the
-   * comparison honest.
-   */
-  points30d?: number[] | null;
-  deltaVsLastMonth?: number | null;
   details?: {
     medications?: Array<{
       name: string;
@@ -112,28 +98,17 @@ export const GET = apiHandler(async () => {
   ];
 
   const thirtyDaysAgo = new Date(Date.now() - 30 * 24 * 60 * 60 * 1000);
-  // v1.4.22 C1 — second 30-day window (days 31–60) so each target card
-  // can render a "Δ vs. last month" caption alongside its sparkline.
-  // We fetch 60 days in one query to keep the route round-trip count
-  // identical to the previous version.
-  const sixtyDaysAgo = new Date(Date.now() - 60 * 24 * 60 * 60 * 1000);
 
-  // Fetch all measurements in the last 60 days + the latest for each type
-  const windowedMeasurements = await prisma.measurement.findMany({
+  // Fetch all measurements in the last 30 days + the latest for each type
+  const recentMeasurements = await prisma.measurement.findMany({
     where: {
       userId,
       type: { in: types },
-      measuredAt: { gte: sixtyDaysAgo },
+      measuredAt: { gte: thirtyDaysAgo },
     },
     orderBy: { measuredAt: "desc" },
     select: { type: true, value: true, measuredAt: true },
   });
-  const recentMeasurements = windowedMeasurements.filter(
-    (m) => m.measuredAt >= thirtyDaysAgo,
-  );
-  const priorMeasurements = windowedMeasurements.filter(
-    (m) => m.measuredAt < thirtyDaysAgo,
-  );
 
   // Also get the absolute latest measurement per type (even if older than 30 days).
   // Single grouped query replaces the previous N×findFirst loop — DISTINCT ON
@@ -188,50 +163,6 @@ export const GET = apiHandler(async () => {
     return "stable";
   }
 
-  /**
-   * v1.4.22 C1 — sparkline + delta helpers. The sparkline collapses
-   * the last 30 days of values for a measurement type into a daily
-   * mean series (chronological, oldest → newest). The delta is the
-   * signed difference between the current 30-day window's average
-   * and the prior 30-day window's average. Both helpers skip the
-   * computation when there are fewer than 3 points in a window so
-   * the comparison stays honest on cold-start accounts.
-   */
-  function sparklinePoints(type: MeasurementType): number[] | null {
-    const data = recentMeasurements
-      .filter((m) => m.type === type)
-      .sort((a, b) => a.measuredAt.getTime() - b.measuredAt.getTime());
-    if (data.length < 3) return null;
-
-    // v1.4.22 W5 reconcile (Code-MED-3) — bucket by Berlin calendar
-    // day, not UTC. A 23:30-Berlin reading on Tuesday otherwise
-    // lands in Wednesday's UTC bucket and the sparkline drifts a
-    // day on cross-DST boundaries. Aligns with `berlinDayKey()`
-    // already used by the dashboard analytics route.
-    const byDay = new Map<string, { sum: number; count: number }>();
-    for (const m of data) {
-      const day = berlinDayKey(m.measuredAt);
-      const bucket = byDay.get(day) ?? { sum: 0, count: 0 };
-      bucket.sum += m.value;
-      bucket.count += 1;
-      byDay.set(day, bucket);
-    }
-    return Array.from(byDay.values()).map(
-      (b) => Math.round((b.sum / b.count) * 10) / 10,
-    );
-  }
-
-  function deltaVsLastMonth(type: MeasurementType): number | null {
-    const recentOfType = recentMeasurements.filter((m) => m.type === type);
-    const priorOfType = priorMeasurements.filter((m) => m.type === type);
-    if (recentOfType.length < 3 || priorOfType.length < 3) return null;
-    const recentAvg =
-      recentOfType.reduce((s, m) => s + m.value, 0) / recentOfType.length;
-    const priorAvg =
-      priorOfType.reduce((s, m) => s + m.value, 0) / priorOfType.length;
-    return Math.round((recentAvg - priorAvg) * 10) / 10;
-  }
-
   // Build target items
   const targets: TargetItem[] = [];
 
@@ -254,8 +185,6 @@ export const GET = apiHandler(async () => {
     range: weightRange,
     classification: weightClassification,
     source: "WHO BMI",
-    points30d: sparklinePoints("WEIGHT"),
-    deltaVsLastMonth: deltaVsLastMonth("WEIGHT"),
   });
 
   // 2. Blood Pressure (sys/dia combined)
@@ -281,8 +210,6 @@ export const GET = apiHandler(async () => {
     range: bpRange ? { min: bpRange.sysLow, max: bpRange.sysHigh } : null,
     classification: bpClassification,
     source: "ESH 2023",
-    points30d: sparklinePoints("BLOOD_PRESSURE_SYS"),
-    deltaVsLastMonth: deltaVsLastMonth("BLOOD_PRESSURE_SYS"),
     // Extra fields for diastolic
   } as TargetItem);
 
@@ -349,8 +276,6 @@ export const GET = apiHandler(async () => {
     range: { min: pulseTarget.greenMin, max: pulseTarget.greenMax },
     classification: pulseClassification,
     source: pulseTarget.source,
-    points30d: sparklinePoints("PULSE"),
-    deltaVsLastMonth: deltaVsLastMonth("PULSE"),
   });
 
   // 4. Sleep Duration
@@ -370,8 +295,6 @@ export const GET = apiHandler(async () => {
     range: sleepRange,
     classification: sleepClassification,
     source: "AASM/SRS",
-    points30d: sparklinePoints("SLEEP_DURATION"),
-    deltaVsLastMonth: deltaVsLastMonth("SLEEP_DURATION"),
   });
 
   // 5. BMI (derived from weight + height)
@@ -395,19 +318,6 @@ export const GET = apiHandler(async () => {
       bmiClassification = { category: cls.category, color: cls.color };
     }
 
-    // BMI sparkline / delta derive from the weight series \u2014 divide each
-    // point by height\u00B2 so the y-axis matches the BMI range bar above.
-    const weightPoints = sparklinePoints("WEIGHT");
-    const bmiPoints =
-      weightPoints != null
-        ? weightPoints.map((v) => Math.round((v / heightSq) * 10) / 10)
-        : null;
-    const weightDelta = deltaVsLastMonth("WEIGHT");
-    const bmiDelta =
-      weightDelta != null
-        ? Math.round((weightDelta / heightSq) * 10) / 10
-        : null;
-
     targets.push({
       type: "BMI",
       label: "BMI",
@@ -418,8 +328,6 @@ export const GET = apiHandler(async () => {
       range: { min: 18.5, max: 24.9 },
       classification: bmiClassification,
       source: "WHO",
-      points30d: bmiPoints,
-      deltaVsLastMonth: bmiDelta,
     });
   }
 
@@ -445,8 +353,6 @@ export const GET = apiHandler(async () => {
     range: bodyFatRange,
     classification: bodyFatClassification,
     source: "ACE",
-    points30d: sparklinePoints("BODY_FAT"),
-    deltaVsLastMonth: deltaVsLastMonth("BODY_FAT"),
   });
 
   // 7. Activity Steps
@@ -465,8 +371,6 @@ export const GET = apiHandler(async () => {
     unit: "steps",
     range: stepsRange,
     classification: stepsClassification,
-    points30d: sparklinePoints("ACTIVITY_STEPS"),
-    deltaVsLastMonth: deltaVsLastMonth("ACTIVITY_STEPS"),
     // WHO publishes activity *time* (150–300 min/wk moderate),
     // not a step quota. The closest peer-reviewed dose-response
     // for the 8 000–15 000 band is Saint-Maurice JAMA 2020. The
diff --git a/src/app/targets/page.tsx b/src/app/targets/page.tsx
index d2f817eb5..c982c71a5 100644
--- a/src/app/targets/page.tsx
+++ b/src/app/targets/page.tsx
@@ -38,13 +38,6 @@ interface TargetData {
   range: { min: number; max: number } | null;
   classification: { category: string; color: string } | null;
   source: string;
-  /**
-   * v1.4.22 C1 — sparkline + vs.-last-month delta. Optional; the API
-   * skips both when a window has fewer than 3 readings so the comparison
-   * stays honest on a fresh account.
-   */
-  points30d?: number[] | null;
-  deltaVsLastMonth?: number | null;
   details?: {
     medications?: Array<{
       name: string;
@@ -248,60 +241,6 @@ function getTargetSourceLink(target: TargetData): string | null {
   return null;
 }
 
-/**
- * v1.4.22 C1 — tiny inline sparkline. Each target card paints the last
- * 30 days of values beneath the range bar so the page reads as a
- * "current state + recent journey" surface rather than a static
- * reference card. The SVG is dependency-free and renders in <1ms; we
- * deliberately avoid pulling Recharts in here because every card on
- * the page would mount its own ResponsiveContainer.
- *
- * The path stays in the dracula-purple token so the colour reads as a
- * neutral trace, not a status signal — the range bar above already
- * carries the green/yellow/red semantics and a second status colour
- * on the sparkline would compete for the user's eye.
- */
-function Sparkline({
-  points,
-  className,
-}: {
-  points: number[];
-  className?: string;
-}) {
-  if (points.length < 2) return null;
-  const min = Math.min(...points);
-  const max = Math.max(...points);
-  const span = Math.max(max - min, 0.0001);
-  const w = 100;
-  const h = 24;
-  const stepX = w / (points.length - 1);
-  const path = points
-    .map((value, i) => {
-      const x = i * stepX;
-      const y = h - ((value - min) / span) * h;
-      return `${i === 0 ? "M" : "L"}${x.toFixed(2)},${y.toFixed(2)}`;
-    })
-    .join(" ");
-  return (
-    <svg
-      viewBox={`0 0 ${w} ${h}`}
-      preserveAspectRatio="none"
-      className={`h-6 w-full ${className ?? ""}`}
-      aria-hidden="true"
-      data-slot="target-sparkline"
-    >
-      <path
-        d={path}
-        fill="none"
-        stroke="var(--dracula-purple)"
-        strokeWidth={1.5}
-        strokeLinecap="round"
-        strokeLinejoin="round"
-      />
-    </svg>
-  );
-}
-
 function TrendIcon({ trend }: { trend: "up" | "down" | "stable" | null }) {
   if (trend === "up") {
     return <TrendingUp className="h-4 w-4 text-orange-400" />;
@@ -568,31 +507,6 @@ function TargetCard({
           </div>
         )}
 
-        {/* v1.4.22 C1 — sparkline + Δ-vs-last-month caption. The
-            sparkline collapses to a thinner trace on mobile via the
-            shared 24px height, and the delta caption sits on its own
-            line so it stays scannable next to the range bar above. */}
-        {target.points30d && target.points30d.length >= 2 && (
-          <div className="space-y-1" data-slot="target-trend">
-            <Sparkline points={target.points30d} />
-            {target.deltaVsLastMonth != null && (
-              <p
-                className="text-muted-foreground text-xs"
-                data-slot="target-delta"
-              >
-                {Math.abs(target.deltaVsLastMonth) < 0.05
-                  ? t("targets.deltaVsLastMonthFlat", { unit: target.unit })
-                  : t("targets.deltaVsLastMonth", {
-                      delta:
-                        (target.deltaVsLastMonth > 0 ? "+" : "−") +
-                        Math.abs(target.deltaVsLastMonth).toFixed(1),
-                      unit: target.unit,
-                    })}
-              </p>
-            )}
-          </div>
-        )}
-
         {isMedicationCompliance && medicationBreakdown.length > 0 && (
           <div className="space-y-1.5">
             <p className="text-muted-foreground text-xs">