diff --git a/android/app/src/main/java/com/js8call/example/ui/MonitorFragment.kt b/android/app/src/main/java/com/js8call/example/ui/MonitorFragment.kt
index ceadbfc0..4e114c24 100644
--- a/android/app/src/main/java/com/js8call/example/ui/MonitorFragment.kt
+++ b/android/app/src/main/java/com/js8call/example/ui/MonitorFragment.kt
@@ -11,13 +11,17 @@ import android.view.ViewGroup
 import android.widget.ImageView
 import android.widget.PopupMenu
 import android.widget.TextView
+import androidx.appcompat.app.AlertDialog
 import androidx.core.content.ContextCompat
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.ViewModelProvider
+import androidx.preference.PreferenceManager
 import com.google.android.material.button.MaterialButton
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.materialswitch.MaterialSwitch
 import com.google.android.material.snackbar.Snackbar
+import com.google.android.material.textfield.TextInputEditText
+import com.google.android.material.textfield.TextInputLayout
 import com.js8call.example.R
 import com.js8call.example.model.EngineState
 import com.js8call.example.model.MonitorStatus
@@ -40,6 +44,7 @@ class MonitorFragment : Fragment() {
     private lateinit var frequencyButton: MaterialButton
     private lateinit var powerSwitch: MaterialSwitch
     private lateinit var telemetryText: TextView
+    private lateinit var driftText: TextView
 
     // Frequency management
     private var frequencyEntries = listOf<String>()
@@ -78,6 +83,7 @@ class MonitorFragment : Fragment() {
         frequencyButton = view.findViewById(R.id.frequency_button)
         powerSwitch = view.findViewById(R.id.power_switch)
         telemetryText = view.findViewById(R.id.telemetry_text)
+        driftText = view.findViewById(R.id.drift_text)
 
         // Navigation keeps this fragment instance but recreates its views at
         // their layout defaults, so the repaint memo has to reset with them or
@@ -113,6 +119,7 @@ class MonitorFragment : Fragment() {
         frequencyButton.setOnClickListener { showFrequencyDialog() }
         view.findViewById<MaterialButton>(R.id.monitor_overflow)
             .setOnClickListener { showOverflowMenu(it) }
+        driftText.setOnClickListener { showTimeDriftDialog() }
     }
 
     override fun onResume() {
@@ -214,21 +221,17 @@ class MonitorFragment : Fragment() {
     }
 
     private fun renderTelemetry(status: MonitorStatus) {
-        val drift = if (status.timeDriftMs != 0L) {
-            String.format("%+d ms", status.timeDriftMs)
-        } else {
-            "0 ms"
-        }
-        val offsetAndDrift = getString(
-            R.string.monitor_telemetry,
-            status.txOffsetHz.toInt(),
-            drift
-        )
+        val offset = getString(R.string.monitor_telemetry, status.txOffsetHz.toInt())
         // A stopped engine reads no power, and a leading placeholder just adds noise
         telemetryText.text = if (status.powerDb != 0f) {
-            getString(R.string.monitor_telemetry_power, status.powerDb, offsetAndDrift)
+            getString(R.string.monitor_telemetry_power, status.powerDb, offset)
         } else {
-            offsetAndDrift
+            offset
+        }
+        driftText.text = if (status.timeDriftMs != 0L) {
+            String.format("%+d ms", status.timeDriftMs)
+        } else {
+            "0 ms"
         }
     }
 
@@ -245,6 +248,10 @@ class MonitorFragment : Fragment() {
                     armTimeSync()
                     true
                 }
+                R.id.action_time_drift_adjust -> {
+                    showTimeDriftDialog()
+                    true
+                }
                 R.id.action_time_drift_reset -> {
                     resetTimeDrift()
                     true
@@ -264,13 +271,73 @@ class MonitorFragment : Fragment() {
     }
 
     private fun resetTimeDrift() {
+        applyTimeDrift(0L)
+    }
+
+    private fun applyTimeDrift(driftMs: Long) {
         val intent = Intent(requireContext(), JS8EngineService::class.java).apply {
             action = JS8EngineService.ACTION_SET_TIME_DRIFT
-            putExtra(JS8EngineService.EXTRA_TIME_DRIFT_MS, 0L)
+            putExtra(JS8EngineService.EXTRA_TIME_DRIFT_MS, driftMs)
         }
         requireContext().startService(intent)
     }
 
+    private fun showTimeDriftDialog() {
+        val view = layoutInflater.inflate(R.layout.dialog_time_drift, null)
+        val input = view.findViewById<TextInputEditText>(R.id.drift_input)
+        val inputLayout = view.findViewById<TextInputLayout>(R.id.drift_input_layout)
+
+        // Not the strip's copy, which reads 0 after a relaunch
+        val currentMs = PreferenceManager.getDefaultSharedPreferences(requireContext())
+            .getLong(JS8EngineService.PREF_TIME_DRIFT_MS, 0L)
+        input.setText(currentMs.toString())
+        input.setSelection(input.text?.length ?: 0)
+
+        fun nudge(deltaMs: Long) {
+            val current = input.text?.toString()?.toLongOrNull() ?: 0L
+            input.setText((current + deltaMs).coerceIn(-DRIFT_LIMIT_MS, DRIFT_LIMIT_MS).toString())
+            input.setSelection(input.text?.length ?: 0)
+            inputLayout.error = null
+        }
+        view.findViewById<MaterialButton>(R.id.nudge_minus_second).setOnClickListener { nudge(-1000L) }
+        view.findViewById<MaterialButton>(R.id.nudge_minus_fine).setOnClickListener { nudge(-100L) }
+        view.findViewById<MaterialButton>(R.id.nudge_plus_fine).setOnClickListener { nudge(100L) }
+        view.findViewById<MaterialButton>(R.id.nudge_plus_second).setOnClickListener { nudge(1000L) }
+
+        val dialog = MaterialAlertDialogBuilder(requireContext())
+            .setTitle(R.string.monitor_time_drift_title)
+            .setView(view)
+            .setPositiveButton(R.string.monitor_time_drift_set, null)
+            .setNegativeButton(android.R.string.cancel, null)
+            .setNeutralButton(R.string.monitor_time_drift_reset_action, null)
+            .create()
+
+        dialog.setOnShowListener {
+            // Set here, not in the builder, so a bad value keeps the dialog open
+            dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener {
+                val value = input.text?.toString()?.toLongOrNull()
+                if (value == null || value < -DRIFT_LIMIT_MS || value > DRIFT_LIMIT_MS) {
+                    inputLayout.error = getString(
+                        R.string.monitor_time_drift_range, -DRIFT_LIMIT_MS.toInt(), DRIFT_LIMIT_MS.toInt()
+                    )
+                    return@setOnClickListener
+                }
+                applyTimeDrift(value)
+                Snackbar.make(
+                    requireView(),
+                    getString(R.string.monitor_time_drift_applied, value.toInt()),
+                    Snackbar.LENGTH_SHORT
+                ).show()
+                dialog.dismiss()
+            }
+            dialog.getButton(AlertDialog.BUTTON_NEUTRAL).setOnClickListener {
+                input.setText("0")
+                inputLayout.error = null
+            }
+        }
+        dialog.show()
+    }
+
     private fun startMonitoring() {
         // Starting an engine that is already up tears down its audio capture
         val state = viewModel.status.value?.state
@@ -498,5 +565,8 @@ class MonitorFragment : Fragment() {
 
     companion object {
         private const val REQUEST_AUDIO_PERMISSION = 1
+
+        // The RX ring aligns to the UTC minute, so a larger offset wraps
+        private const val DRIFT_LIMIT_MS = 30_000L
     }
 }
diff --git a/android/app/src/main/res/layout/dialog_time_drift.xml b/android/app/src/main/res/layout/dialog_time_drift.xml
new file mode 100644
index 00000000..ba03c7d1
--- /dev/null
+++ b/android/app/src/main/res/layout/dialog_time_drift.xml
@@ -0,0 +1,101 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:paddingStart="24dp"
+    android:paddingEnd="24dp"
+    android:paddingTop="8dp">
+
+    <com.google.android.material.textfield.TextInputLayout
+        android:id="@+id/drift_input_layout"
+        style="@style/Widget.Material3.TextInputLayout.OutlinedBox"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/monitor_time_drift_hint"
+        app:suffixText="@string/monitor_time_drift_suffix">
+
+        <com.google.android.material.textfield.TextInputEditText
+            android:id="@+id/drift_input"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:inputType="numberSigned"
+            android:maxLength="7"
+            android:selectAllOnFocus="true" />
+
+    </com.google.android.material.textfield.TextInputLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="12dp"
+        android:orientation="horizontal">
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/nudge_minus_second"
+            style="@style/Widget.Material3.Button.OutlinedButton"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="4dp"
+            android:layout_weight="1"
+            android:insetLeft="0dp"
+            android:insetRight="0dp"
+            android:minWidth="0dp"
+            android:paddingStart="0dp"
+            android:paddingEnd="0dp"
+            android:text="@string/monitor_time_drift_minus_second" />
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/nudge_minus_fine"
+            style="@style/Widget.Material3.Button.OutlinedButton"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="4dp"
+            android:layout_weight="1"
+            android:insetLeft="0dp"
+            android:insetRight="0dp"
+            android:minWidth="0dp"
+            android:paddingStart="0dp"
+            android:paddingEnd="0dp"
+            android:text="@string/monitor_time_drift_minus_fine" />
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/nudge_plus_fine"
+            style="@style/Widget.Material3.Button.OutlinedButton"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="4dp"
+            android:layout_weight="1"
+            android:insetLeft="0dp"
+            android:insetRight="0dp"
+            android:minWidth="0dp"
+            android:paddingStart="0dp"
+            android:paddingEnd="0dp"
+            android:text="@string/monitor_time_drift_plus_fine" />
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/nudge_plus_second"
+            style="@style/Widget.Material3.Button.OutlinedButton"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:insetLeft="0dp"
+            android:insetRight="0dp"
+            android:minWidth="0dp"
+            android:paddingStart="0dp"
+            android:paddingEnd="0dp"
+            android:text="@string/monitor_time_drift_plus_second" />
+
+    </LinearLayout>
+
+    <TextView
+        android:id="@+id/drift_help"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="12dp"
+        android:text="@string/monitor_time_drift_help"
+        android:textAppearance="?attr/textAppearanceBodySmall"
+        android:textColor="?android:attr/textColorSecondary" />
+
+</LinearLayout>
diff --git a/android/app/src/main/res/layout/monitor_status_card.xml b/android/app/src/main/res/layout/monitor_status_card.xml
index 8536a0bd..ad8eeb06 100644
--- a/android/app/src/main/res/layout/monitor_status_card.xml
+++ b/android/app/src/main/res/layout/monitor_status_card.xml
@@ -88,14 +88,35 @@
 
         <TextView
             android:id="@+id/telemetry_text"
-            android:layout_width="0dp"
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:ellipsize="end"
             android:maxLines="1"
             android:textAppearance="?attr/textAppearanceLabelMedium"
             android:textColor="?attr/colorOnSurfaceVariant"
-            tools:text="-18.0 dB · TX 1500 Hz · +12 ms" />
+            tools:text="-18.0 dB · TX 1500 Hz" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/monitor_telemetry_separator"
+            android:textAppearance="?attr/textAppearanceLabelMedium"
+            android:textColor="?attr/colorOnSurfaceVariant" />
+
+        <TextView
+            android:id="@+id/drift_text"
+            android:layout_width="wrap_content"
+            android:layout_height="match_parent"
+            android:background="?attr/selectableItemBackground"
+            android:gravity="center_vertical"
+            android:maxLines="1"
+            android:textAppearance="?attr/textAppearanceLabelMedium"
+            android:textColor="?attr/colorOnSurfaceVariant"
+            tools:text="+12 ms" />
+
+        <Space
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            android:layout_weight="1" />
 
         <com.google.android.material.button.MaterialButton
             android:id="@+id/monitor_overflow"
diff --git a/android/app/src/main/res/menu/monitor_overflow.xml b/android/app/src/main/res/menu/monitor_overflow.xml
index 741403ea..8c364dd4 100644
--- a/android/app/src/main/res/menu/monitor_overflow.xml
+++ b/android/app/src/main/res/menu/monitor_overflow.xml
@@ -9,6 +9,10 @@
         android:id="@+id/action_time_sync"
         android:title="@string/monitor_menu_time_sync" />
 
+    <item
+        android:id="@+id/action_time_drift_adjust"
+        android:title="@string/monitor_menu_time_drift_adjust" />
+
     <item
         android:id="@+id/action_time_drift_reset"
         android:title="@string/monitor_menu_time_drift_reset" />
diff --git a/android/app/src/main/res/values/strings.xml b/android/app/src/main/res/values/strings.xml
index 259044c5..be2119d9 100644
--- a/android/app/src/main/res/values/strings.xml
+++ b/android/app/src/main/res/values/strings.xml
@@ -21,11 +21,25 @@
     <string name="monitor_state_error">Error</string>
     <string name="monitor_toggle">Monitoring</string>
     <string name="monitor_more">More options</string>
-    <string name="monitor_telemetry">TX %1$d Hz · %2$s</string>
+    <string name="monitor_telemetry">TX %1$d Hz</string>
+    <string name="monitor_telemetry_separator" translatable="false">" · "</string>
     <string name="monitor_telemetry_power">%1$.1f dB · %2$s</string>
     <string name="monitor_menu_audio_device">Audio device</string>
     <string name="monitor_menu_time_sync">Sync clock to next decode</string>
+    <string name="monitor_menu_time_drift_adjust">Adjust time drift…</string>
     <string name="monitor_menu_time_drift_reset">Reset time drift</string>
+    <string name="monitor_time_drift_title">Time drift</string>
+    <string name="monitor_time_drift_hint">Offset</string>
+    <string name="monitor_time_drift_suffix">ms</string>
+    <string name="monitor_time_drift_minus_second">−1s</string>
+    <string name="monitor_time_drift_minus_fine">−100</string>
+    <string name="monitor_time_drift_plus_fine">+100</string>
+    <string name="monitor_time_drift_plus_second">+1s</string>
+    <string name="monitor_time_drift_help">Shifts decode windows and transmit timing without changing the device clock. Negative when the clock runs fast.</string>
+    <string name="monitor_time_drift_set">Set</string>
+    <string name="monitor_time_drift_reset_action">Reset</string>
+    <string name="monitor_time_drift_applied">Time drift %+d ms</string>
+    <string name="monitor_time_drift_range">Enter %1$+d to %2$+d ms</string>
     <string name="monitor_audio_device_switching">Switching to %s…</string>
     <string name="monitor_audio_device_selected">Audio device: %s</string>
     <string name="monitor_audio_device_lost">%s was removed. Monitoring stopped.</string>