diff --git a/cue-ios/CueIOS/Views/ChlorineView.swift b/cue-ios/CueIOS/Views/ChlorineView.swift
index 9e2ba0b..66ad192 100644
--- a/cue-ios/CueIOS/Views/ChlorineView.swift
+++ b/cue-ios/CueIOS/Views/ChlorineView.swift
@@ -7,11 +7,13 @@ struct ChlorineView: View {
     var body: some View {
         VStack(spacing: 0) {
             controlsRow
+            clPeakLabels
             Divider()
             GeometryReader { geo in
                 if geo.size.width > 700 {
                     HSplitLayout(ratio: 0.55) {
                         VStack(spacing: 4) {
+                            voltammogramPlot
                             resultBanner
                             chlorinePlot
                         }
@@ -21,8 +23,9 @@ struct ChlorineView: View {
                 } else {
                     ScrollView {
                         VStack(spacing: 12) {
+                            voltammogramPlot.frame(height: 250)
                             resultBanner
-                            chlorinePlot.frame(height: 350)
+                            chlorinePlot.frame(height: 250)
                             clTable.frame(height: 300)
                         }
                         .padding()
@@ -37,6 +40,21 @@ struct ChlorineView: View {
     private var controlsRow: some View {
         ScrollView(.horizontal, showsIndicators: false) {
             HStack(spacing: 8) {
+                Button("Start LSV") { state.startLSV() }
+                    .buttonStyle(ActionButtonStyle(color: .green))
+
+                Button(state.lsvManualPeaks ? "Manual" : "Auto") {
+                    state.lsvManualPeaks.toggle()
+                    if state.lsvManualPeaks {
+                        state.lsvPeaks.removeAll()
+                    } else {
+                        state.lsvPeaks = detectLsvPeaks(state.lsvPoints)
+                    }
+                }
+                .font(.caption)
+
+                Divider().frame(height: 24)
+
                 LabeledField("Cond mV", text: $state.clCondV, width: 70)
                 LabeledField("Cond ms", text: $state.clCondT, width: 70)
                 LabeledField("Free mV", text: $state.clFreeV, width: 70)
@@ -88,7 +106,102 @@ struct ChlorineView: View {
         }
     }
 
-    // MARK: - Plot
+    // MARK: - Peak labels
+
+    @ViewBuilder
+    private var clPeakLabels: some View {
+        if !state.lsvPeaks.isEmpty {
+            HStack(spacing: 12) {
+                ForEach(Array(state.lsvPeaks.enumerated()), id: \.offset) { _, peak in
+                    let label: String = {
+                        switch peak.kind {
+                        case .freeCl:   return String(format: "Free: %.0fmV %.2fuA", peak.vMv, peak.iUa)
+                        case .totalCl:  return String(format: "Total: %.0fmV %.2fuA", peak.vMv, peak.iUa)
+                        case .crossover: return String(format: "X-over: %.0fmV", peak.vMv)
+                        }
+                    }()
+                    Text(label)
+                        .font(.caption)
+                        .foregroundStyle(clPeakColor(peak.kind))
+                }
+            }
+            .padding(.horizontal, 8)
+            .padding(.vertical, 4)
+        }
+    }
+
+    private func clPeakColor(_ kind: PeakKind) -> Color {
+        switch kind {
+        case .freeCl:   .green
+        case .totalCl:  .orange
+        case .crossover: .purple
+        }
+    }
+
+    // MARK: - Voltammogram
+
+    private var voltammogramPlot: some View {
+        Group {
+            if state.lsvPoints.isEmpty {
+                Text("No LSV data")
+                    .foregroundStyle(Color(white: 0.4))
+                    .frame(maxWidth: .infinity, maxHeight: .infinity)
+                    .background(Color.black.opacity(0.3))
+            } else {
+                PlotContainer(title: "") {
+                    Chart {
+                        if let ref = state.lsvRef {
+                            ForEach(Array(ref.enumerated()), id: \.offset) { _, pt in
+                                LineMark(x: .value("V", Double(pt.vMv)), y: .value("I", Double(pt.iUa)))
+                                    .foregroundStyle(Color.gray.opacity(0.5))
+                                    .lineStyle(StrokeStyle(lineWidth: 1.5))
+                            }
+                        }
+                        ForEach(Array(state.lsvPoints.enumerated()), id: \.offset) { _, pt in
+                            LineMark(x: .value("V", Double(pt.vMv)), y: .value("I", Double(pt.iUa)))
+                                .foregroundStyle(Color.yellow)
+                                .lineStyle(StrokeStyle(lineWidth: 2))
+                        }
+                        ForEach(Array(state.lsvPoints.enumerated()), id: \.offset) { _, pt in
+                            PointMark(x: .value("V", Double(pt.vMv)), y: .value("I", Double(pt.iUa)))
+                                .foregroundStyle(Color.yellow)
+                                .symbolSize(16)
+                        }
+                        ForEach(Array(state.lsvPeaks.enumerated()), id: \.offset) { _, peak in
+                            PointMark(x: .value("V", Double(peak.vMv)), y: .value("I", Double(peak.iUa)))
+                                .foregroundStyle(clPeakColor(peak.kind))
+                                .symbolSize(100)
+                                .symbol(.diamond)
+                            RuleMark(x: .value("V", Double(peak.vMv)))
+                                .foregroundStyle(clPeakColor(peak.kind).opacity(0.3))
+                                .lineStyle(StrokeStyle(lineWidth: 1, dash: [4, 4]))
+                        }
+                    }
+                    .chartXAxisLabel("V (mV)")
+                    .chartYAxisLabel("I (uA)", position: .leading)
+                    .chartXAxis {
+                        AxisMarks { _ in
+                            AxisGridLine(stroke: StrokeStyle(lineWidth: 0.5))
+                                .foregroundStyle(Color.gray.opacity(0.3))
+                            AxisValueLabel().font(.caption2).foregroundStyle(.secondary)
+                        }
+                    }
+                    .chartYAxis {
+                        AxisMarks(position: .leading) { _ in
+                            AxisGridLine(stroke: StrokeStyle(lineWidth: 0.5))
+                                .foregroundStyle(Color.gray.opacity(0.3))
+                            AxisValueLabel().font(.caption2).foregroundStyle(Color.yellow)
+                        }
+                    }
+                    .padding(8)
+                }
+            }
+        }
+        .background(Color.black.opacity(0.3))
+        .clipShape(RoundedRectangle(cornerRadius: 8))
+    }
+
+    // MARK: - Chlorine plot
 
     private var chlorinePlot: some View {
         Group {