diff --git a/app/src/main/java/com/rtbishop/look4sat/ui/SharedViewModel.kt b/app/src/main/java/com/rtbishop/look4sat/ui/SharedViewModel.kt
index ad2bad1f..fe68586d 100644
--- a/app/src/main/java/com/rtbishop/look4sat/ui/SharedViewModel.kt
+++ b/app/src/main/java/com/rtbishop/look4sat/ui/SharedViewModel.kt
@@ -55,7 +55,6 @@ class SharedViewModel @Inject constructor(
     fun getGSP(): LiveData<Result<GroundStationPosition>> = _gsp
 
     fun getCompass() = prefsManager.getCompass()
-    fun getRefreshRate() = prefsManager.getRefreshRate()
     fun getHoursAhead() = prefsManager.getHoursAhead()
     fun getMinElevation() = prefsManager.getMinElevation()
     suspend fun getAllEntries() = repository.getAllEntries()
diff --git a/app/src/main/java/com/rtbishop/look4sat/ui/fragments/PolarFragment.kt b/app/src/main/java/com/rtbishop/look4sat/ui/fragments/PolarFragment.kt
index 1a5ca60d..cda828ac 100644
--- a/app/src/main/java/com/rtbishop/look4sat/ui/fragments/PolarFragment.kt
+++ b/app/src/main/java/com/rtbishop/look4sat/ui/fragments/PolarFragment.kt
@@ -108,12 +108,11 @@ class PolarFragment : Fragment(R.layout.fragment_polar), SensorEventListener {
     private fun observePasses() {
         viewModel.getPassList().observe(viewLifecycleOwner, { result ->
             if (result is Result.Success) {
-                val refreshRate = viewModel.getRefreshRate()
                 satPass = result.data[args.satPassIndex]
                 polarView = PolarView(mainActivity, satPass)
                 binding.frame.addView(polarView)
                 observeTransmitters()
-                refreshText(refreshRate)
+                refreshText()
             }
         })
     }
@@ -147,13 +146,13 @@ class PolarFragment : Fragment(R.layout.fragment_polar), SensorEventListener {
         })
     }
 
-    private fun refreshText(rate: Long) {
+    private fun refreshText() {
         lifecycleScope.launch {
             while (true) {
                 setPassText()
                 polarView?.invalidate()
                 transmitterAdapter.notifyDataSetChanged()
-                delay(rate)
+                delay(3000)
             }
         }
     }
diff --git a/app/src/main/java/com/rtbishop/look4sat/ui/fragments/PrefsFragment.kt b/app/src/main/java/com/rtbishop/look4sat/ui/fragments/PrefsFragment.kt
index 68797383..9f0233c2 100644
--- a/app/src/main/java/com/rtbishop/look4sat/ui/fragments/PrefsFragment.kt
+++ b/app/src/main/java/com/rtbishop/look4sat/ui/fragments/PrefsFragment.kt
@@ -26,24 +26,16 @@ import androidx.preference.EditTextPreference
 import androidx.preference.PreferenceFragmentCompat
 import com.rtbishop.look4sat.R
 import com.rtbishop.look4sat.utility.Extensions.snack
+import com.rtbishop.look4sat.utility.PrefsManager
 
 class PrefsFragment : PreferenceFragmentCompat(),
     SharedPreferences.OnSharedPreferenceChangeListener {
 
-    private lateinit var keyLat: String
-    private lateinit var keyLon: String
-    private lateinit var keyAlt: String
-    private lateinit var keyDelay: String
-
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
         setPreferencesFromResource(R.xml.preference, rootKey)
         val provider = EditTextPreference.SimpleSummaryProvider.getInstance()
-        keyLat = preferenceManager.context.getString(R.string.pref_lat_key)
-        keyLon = preferenceManager.context.getString(R.string.pref_lon_key)
-        keyAlt = preferenceManager.context.getString(R.string.pref_alt_key)
-        keyDelay = preferenceManager.context.getString(R.string.pref_refresh_rate_key)
 
-        findPreference<EditTextPreference>(keyLat)?.apply {
+        findPreference<EditTextPreference>(PrefsManager.keyLatitude)?.apply {
             summaryProvider = provider
             setOnBindEditTextListener {
                 it.inputType = InputType.TYPE_CLASS_NUMBER or
@@ -60,7 +52,7 @@ class PrefsFragment : PreferenceFragmentCompat(),
             }
         }
 
-        findPreference<EditTextPreference>(keyLon)?.apply {
+        findPreference<EditTextPreference>(PrefsManager.keyLongitude)?.apply {
             summaryProvider = provider
             setOnBindEditTextListener {
                 it.inputType = InputType.TYPE_CLASS_NUMBER or
@@ -77,7 +69,7 @@ class PrefsFragment : PreferenceFragmentCompat(),
             }
         }
 
-        findPreference<EditTextPreference>(keyAlt)?.apply {
+        findPreference<EditTextPreference>(PrefsManager.keyAltitude)?.apply {
             summaryProvider = provider
             setOnBindEditTextListener {
                 it.inputType = InputType.TYPE_CLASS_NUMBER or
@@ -93,19 +85,6 @@ class PrefsFragment : PreferenceFragmentCompat(),
                 return@setOnPreferenceChangeListener true
             }
         }
-
-        findPreference<EditTextPreference>(keyDelay)?.apply {
-            summaryProvider = provider
-            setOnBindEditTextListener { it.inputType = InputType.TYPE_CLASS_NUMBER }
-            setOnPreferenceChangeListener { _, newValue ->
-                val valueStr = newValue.toString()
-                if (valueStr.isEmpty() || valueStr.toLong() < 250 || valueStr.toLong() > 10000) {
-                    getString(R.string.pref_refresh_rate_input_error).snack(requireView())
-                    return@setOnPreferenceChangeListener false
-                }
-                return@setOnPreferenceChangeListener true
-            }
-        }
     }
 
     override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {}
diff --git a/app/src/main/java/com/rtbishop/look4sat/utility/PrefsManager.kt b/app/src/main/java/com/rtbishop/look4sat/utility/PrefsManager.kt
index 3c2df13a..9b6f233e 100644
--- a/app/src/main/java/com/rtbishop/look4sat/utility/PrefsManager.kt
+++ b/app/src/main/java/com/rtbishop/look4sat/utility/PrefsManager.kt
@@ -30,21 +30,21 @@ class PrefsManager @Inject constructor(
     private val preferences: SharedPreferences,
     private val locationManager: LocationManager
 ) {
-    private val keyHoursAhead = "hoursAhead"
-    private val keyMinElevation = "minEl"
-    private val keyLatitude = "latitude"
-    private val keyLongitude = "longitude"
-    private val keyAltitude = "altitude"
-    private val keyRefreshRate = "rate"
-    private val keyCompass = "compass"
-    private val keyTimeUtc = "timeUTC"
-    private val defaultHoursAhead = 8
-    private val defaultMinEl = 16.0
-    private val defaultRefreshRate = "3000"
-    private val defaultGSP = "0.0"
+    companion object {
+        const val keyHoursAhead = "hoursAhead"
+        const val keyMinElevation = "minEl"
+        const val keyLatitude = "latitude"
+        const val keyLongitude = "longitude"
+        const val keyAltitude = "altitude"
+        const val keyCompass = "compass"
+        const val keyTimeUtc = "timeUTC"
+        const val defaultHoursAhead = 8
+        const val defaultMinEl = 16.0
+        const val defaultGSP = "0.0"
+        const val keyIsFirstLaunch = "keyIsFirstLaunch"
+    }
 
     fun isFirstLaunch(): Boolean {
-        val keyIsFirstLaunch = "keyIsFirstLaunch"
         val isFirstLaunch = preferences.getBoolean(keyIsFirstLaunch, true)
         return if (isFirstLaunch) {
             preferences.edit {
@@ -67,10 +67,6 @@ class PrefsManager @Inject constructor(
         return preferences.getDouble(keyMinElevation, defaultMinEl)
     }
 
-    fun getRefreshRate(): Long {
-        return preferences.getString(keyRefreshRate, defaultRefreshRate)!!.toLong()
-    }
-
     fun getCompass(): Boolean {
         return preferences.getBoolean(keyCompass, true)
     }
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
index f647ba4c..26392cf4 100644
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@@ -47,11 +47,7 @@
     <string name="pref_alt_title">Высота, м</string>
     <string name="pref_alt_input_error">Введите значение между -413м и 8850м</string>
     <string name="pref_other_title">Другие настройки</string>
-    <string name="pref_refresh_rate_title">Частота обновления, мс</string>
-    <string name="pref_refresh_rate_input_error">Введите значение между 250мс и 10000мс</string>
     <string name="pref_compass_title">Использовать компас при отображении полярных координат</string>
-
-    <string name="pref_time_utc_key" translatable="false">timeUTC</string>
     <string name="pref_time_utc_title">Показывать время пролёта по UTC</string>
 
     <string name="no_mode">Модуляция: нет</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 19493572..cfefdb76 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -33,33 +33,22 @@
     <string name="dialog_tle_sources">Manage TLE sources</string>
     <string name="dialog_entries_hint">Name/CatNum</string>
 
-    <string name="pref_hours_ahead_key" translatable="false">hoursAhead</string>
     <string name="pref_hours_ahead_hint">Hours ahead</string>
     <string name="pref_hours_ahead_summary">Show passes that occur within X hours</string>
     <string name="pref_hours_ahead_input_error">Set the value between 1h and 168h</string>
-    <string name="pref_min_el_key" translatable="false">minEl</string>
     <string name="pref_min_el_hint">Minimum elevation</string>
     <string name="pref_min_el_summary">Show passes with max elevation above</string>
     <string name="pref_min_el_input_error">Set the value between 0° and 90°</string>
 
     <string name="pref_gsp_title">Ground station position</string>
-    <string name="pref_lat_key" translatable="false">latitude</string>
     <string name="pref_lat_title">Latitude, deg</string>
     <string name="pref_lat_input_error">Set the value between -90° and 90°</string>
-    <string name="pref_lon_key" translatable="false">longitude</string>
     <string name="pref_lon_title">Longitude, deg</string>
     <string name="pref_lon_input_error">Set the value between -180° and 180°</string>
-    <string name="pref_alt_key" translatable="false">altitude</string>
     <string name="pref_alt_title">Altitude, m</string>
     <string name="pref_alt_input_error">Set the value between -413m and 8850m</string>
     <string name="pref_other_title">Other</string>
-    <string name="pref_refresh_rate_key" translatable="false">rate</string>
-    <string name="pref_refresh_rate_title">Refresh rate, ms</string>
-    <string name="pref_refresh_rate_input_error">Set the value between 250ms and 10000ms</string>
-    <string name="pref_compass_key" translatable="false">compass</string>
     <string name="pref_compass_title">Use sensors to rotate PolarView</string>
-
-    <string name="pref_time_utc_key" translatable="false">timeUTC</string>
     <string name="pref_time_utc_title">Show pass time in UTC</string>
 
     <string name="no_mode">Mode: null</string>
diff --git a/app/src/main/res/xml/preference.xml b/app/src/main/res/xml/preference.xml
index 20de182b..619e18b4 100644
--- a/app/src/main/res/xml/preference.xml
+++ b/app/src/main/res/xml/preference.xml
@@ -21,37 +21,25 @@
     <PreferenceCategory android:title="@string/pref_gsp_title">
         <EditTextPreference
             android:defaultValue="0.0"
-            android:key="@string/pref_lat_key"
-            android:selectAllOnFocus="true"
-            android:singleLine="true"
+            android:key="latitude"
             android:title="@string/pref_lat_title" />
         <EditTextPreference
             android:defaultValue="0.0"
-            android:key="@string/pref_lon_key"
-            android:selectAllOnFocus="true"
-            android:singleLine="true"
+            android:key="longitude"
             android:title="@string/pref_lon_title" />
         <EditTextPreference
             android:defaultValue="0.0"
-            android:key="@string/pref_alt_key"
-            android:selectAllOnFocus="true"
-            android:singleLine="true"
+            android:key="altitude"
             android:title="@string/pref_alt_title" />
     </PreferenceCategory>
     <PreferenceCategory android:title="@string/pref_other_title">
-        <EditTextPreference
-            android:defaultValue="3000"
-            android:key="@string/pref_refresh_rate_key"
-            android:selectAllOnFocus="true"
-            android:singleLine="true"
-            android:title="@string/pref_refresh_rate_title" />
         <SwitchPreference
             android:defaultValue="false"
-            android:key="@string/pref_time_utc_key"
+            android:key="timeUTC"
             android:title="@string/pref_time_utc_title" />
         <SwitchPreference
             android:defaultValue="true"
-            android:key="@string/pref_compass_key"
+            android:key="compass"
             android:title="@string/pref_compass_title" />
     </PreferenceCategory>
 </PreferenceScreen>