diff --git a/app/build.gradle b/app/build.gradle
index 6aca48d..7e9f457 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -2,12 +2,12 @@ apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 26
-    buildToolsVersion '26.0.1'
+    buildToolsVersion '26.0.2'
 
     defaultConfig {
         applicationId "org.traccar.client"
         buildConfigField "boolean", "HIDDEN_APP", "false"
-        minSdkVersion 14
+        minSdkVersion 15
         targetSdkVersion 26
         versionCode 42
         versionName '5.5'
@@ -35,11 +35,12 @@ android {
 }
 
 dependencies {
-    compile 'com.android.support:design:26.0.1'
+    compile 'com.android.support:design:26.1.0'
+    compile 'com.mapzen.android:lost:3.0.2'
     testCompile 'junit:junit:4.12'
     testCompile 'org.robolectric:robolectric:3.4.2'
-    googleCompile 'com.google.firebase:firebase-core:11.2.0'
-    googleCompile 'com.google.firebase:firebase-crash:11.2.0'
+    googleCompile 'com.google.firebase:firebase-core:11.6.0'
+    googleCompile 'com.google.firebase:firebase-crash:11.6.0'
 }
 
 if (getGradle().getStartParameter().getTaskRequests().toString().contains("Google")) {
diff --git a/app/src/main/java/org/traccar/client/MainFragment.java b/app/src/main/java/org/traccar/client/MainFragment.java
index cc4724a..25531a5 100644
--- a/app/src/main/java/org/traccar/client/MainFragment.java
+++ b/app/src/main/java/org/traccar/client/MainFragment.java
@@ -58,7 +58,7 @@ public class MainFragment extends PreferenceFragment implements OnSharedPreferen
     public static final String KEY_INTERVAL = "interval";
     public static final String KEY_DISTANCE = "distance";
     public static final String KEY_ANGLE = "angle";
-    public static final String KEY_PROVIDER = "provider";
+    public static final String KEY_ACCURACY = "accuracy";
     public static final String KEY_STATUS = "status";
 
     private static final int PERMISSIONS_REQUEST_LOCATION = 2;
@@ -175,7 +175,7 @@ public class MainFragment extends PreferenceFragment implements OnSharedPreferen
         findPreference(KEY_INTERVAL).setEnabled(enabled);
         findPreference(KEY_DISTANCE).setEnabled(enabled);
         findPreference(KEY_ANGLE).setEnabled(enabled);
-        findPreference(KEY_PROVIDER).setEnabled(enabled);
+        findPreference(KEY_ACCURACY).setEnabled(enabled);
     }
 
     @Override
@@ -247,13 +247,8 @@ public class MainFragment extends PreferenceFragment implements OnSharedPreferen
                     ALARM_MANAGER_INTERVAL, ALARM_MANAGER_INTERVAL, alarmIntent);
         } else {
             sharedPreferences.edit().putBoolean(KEY_STATUS, false).apply();
-            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
-                TwoStatePreference preference = (TwoStatePreference) findPreference(KEY_STATUS);
-                preference.setChecked(false);
-            } else {
-                CheckBoxPreference preference = (CheckBoxPreference) findPreference(KEY_STATUS);
-                preference.setChecked(false);
-            }
+            TwoStatePreference preference = (TwoStatePreference) findPreference(KEY_STATUS);
+            preference.setChecked(false);
         }
     }
 
diff --git a/app/src/main/java/org/traccar/client/MixedPositionProvider.java b/app/src/main/java/org/traccar/client/MixedPositionProvider.java
deleted file mode 100644
index b6d5543..0000000
--- a/app/src/main/java/org/traccar/client/MixedPositionProvider.java
+++ /dev/null
@@ -1,126 +0,0 @@
-/*
- * Copyright 2015 - 2017 Anton Tananaev (anton.tananaev@gmail.com)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.client;
-
-import android.content.Context;
-import android.location.GpsStatus;
-import android.location.Location;
-import android.location.LocationListener;
-import android.location.LocationManager;
-import android.os.Bundle;
-import android.util.Log;
-
-@SuppressWarnings("MissingPermission")
-public class MixedPositionProvider extends PositionProvider implements LocationListener, GpsStatus.Listener {
-
-    private static final int FIX_TIMEOUT = 30 * 1000;
-
-    private LocationListener backupListener;
-    private long lastFixTime;
-
-    public MixedPositionProvider(Context context, PositionListener listener) {
-        super(context, listener);
-    }
-
-    public void startUpdates() {
-        lastFixTime = System.currentTimeMillis();
-        locationManager.addGpsStatusListener(this);
-        try {
-            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, requestInterval, 0, this);
-        } catch (IllegalArgumentException e) {
-            Log.w(TAG, e);
-        }
-    }
-
-    public void stopUpdates() {
-        locationManager.removeUpdates(this);
-        locationManager.removeGpsStatusListener(this);
-        stopBackupProvider();
-    }
-
-    private void startBackupProvider() {
-        Log.i(TAG, "backup provider start");
-        if (backupListener == null) {
-
-            backupListener = new LocationListener() {
-                @Override
-                public void onLocationChanged(Location location) {
-                    Log.i(TAG, "backup provider location");
-                    updateLocation(location);
-                }
-
-                @Override
-                public void onStatusChanged(String s, int i, Bundle bundle) {
-                }
-
-                @Override
-                public void onProviderEnabled(String s) {
-                }
-
-                @Override
-                public void onProviderDisabled(String s) {
-                }
-            };
-
-            try {
-                locationManager.requestLocationUpdates(
-                        LocationManager.NETWORK_PROVIDER, requestInterval, 0, backupListener);
-            } catch (IllegalArgumentException e) {
-                Log.w(TAG, e);
-            }
-        }
-    }
-
-    private void stopBackupProvider() {
-        Log.i(TAG, "backup provider stop");
-        if (backupListener != null) {
-            locationManager.removeUpdates(backupListener);
-            backupListener = null;
-        }
-    }
-
-    @Override
-    public void onLocationChanged(Location location) {
-        Log.i(TAG, "provider location");
-        stopBackupProvider();
-        lastFixTime = System.currentTimeMillis();
-        updateLocation(location);
-    }
-
-    @Override
-    public void onStatusChanged(String provider, int status, Bundle extras) {
-    }
-
-    @Override
-    public void onProviderEnabled(String provider) {
-        Log.i(TAG, "provider enabled");
-        stopBackupProvider();
-    }
-
-    @Override
-    public void onProviderDisabled(String provider) {
-        Log.i(TAG, "provider disabled");
-        startBackupProvider();
-    }
-
-    @Override
-    public void onGpsStatusChanged(int event) {
-        if (backupListener == null && System.currentTimeMillis() - lastFixTime - requestInterval > FIX_TIMEOUT) {
-            startBackupProvider();
-        }
-    }
-
-}
diff --git a/app/src/main/java/org/traccar/client/PositionProvider.java b/app/src/main/java/org/traccar/client/PositionProvider.java
index 27ed273..90dc0ef 100644
--- a/app/src/main/java/org/traccar/client/PositionProvider.java
+++ b/app/src/main/java/org/traccar/client/PositionProvider.java
@@ -15,19 +15,24 @@
  */
 package org.traccar.client;
 
+import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.SharedPreferences;
 import android.location.Location;
-import android.location.LocationManager;
 import android.os.BatteryManager;
 import android.preference.PreferenceManager;
 import android.util.Log;
 
-public abstract class PositionProvider {
+import com.mapzen.android.lost.api.LocationListener;
+import com.mapzen.android.lost.api.LocationRequest;
+import com.mapzen.android.lost.api.LocationServices;
+import com.mapzen.android.lost.api.LostApiClient;
 
-    protected static final String TAG = PositionProvider.class.getSimpleName();
+public class PositionProvider implements LostApiClient.ConnectionCallbacks, LocationListener {
+
+    private static final String TAG = PositionProvider.class.getSimpleName();
 
     private static final int MINIMUM_INTERVAL = 1000;
 
@@ -38,14 +43,13 @@ public abstract class PositionProvider {
     private final PositionListener listener;
 
     private final Context context;
-    protected final LocationManager locationManager;
+    private SharedPreferences preferences;
+    private LostApiClient apiClient;
 
     private String deviceId;
-    protected String type;
-    protected long requestInterval;
-    protected long interval;
-    protected double distance;
-    protected double angle;
+    private long interval;
+    private double distance;
+    private double angle;
 
     private Location lastLocation;
 
@@ -53,28 +57,42 @@ public abstract class PositionProvider {
         this.context = context;
         this.listener = listener;
 
-        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
-        locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
+        preferences = PreferenceManager.getDefaultSharedPreferences(context);
 
         deviceId = preferences.getString(MainFragment.KEY_DEVICE, "undefined");
         interval = Long.parseLong(preferences.getString(MainFragment.KEY_INTERVAL, "600")) * 1000;
         distance = Integer.parseInt(preferences.getString(MainFragment.KEY_DISTANCE, "0"));
         angle = Integer.parseInt(preferences.getString(MainFragment.KEY_ANGLE, "0"));
-
-        if (distance > 0 || angle > 0) {
-            requestInterval = MINIMUM_INTERVAL;
-        } else {
-            requestInterval = interval;
-        }
-
-        type = preferences.getString(MainFragment.KEY_PROVIDER, "gps");
     }
 
-    public abstract void startUpdates();
+    public void startUpdates() {
+        apiClient = new LostApiClient.Builder(context).addConnectionCallbacks(this).build();
+        apiClient.connect();
+    }
 
-    public abstract void stopUpdates();
+    private int getPriority(String accuracy) {
+        switch (accuracy) {
+            case "high":
+                return LocationRequest.PRIORITY_HIGH_ACCURACY;
+            case "low":
+                return LocationRequest.PRIORITY_LOW_POWER;
+            default:
+                return LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY;
+        }
+    }
 
-    protected void updateLocation(Location location) {
+    @SuppressLint("MissingPermission")
+    @Override
+    public void onConnected() {
+        LocationRequest request = LocationRequest.create()
+                .setPriority(getPriority(preferences.getString(MainFragment.KEY_ACCURACY, "medium")))
+                .setInterval(distance > 0 || angle > 0 ? MINIMUM_INTERVAL : interval);
+
+        LocationServices.FusedLocationApi.requestLocationUpdates(apiClient, request, this);
+    }
+
+    @Override
+    public void onLocationChanged(Location location) {
         if (location != null && (lastLocation == null
                 || location.getTime() - lastLocation.getTime() >= interval
                 || distance > 0 && DistanceCalculator.distance(location.getLatitude(), location.getLongitude(), lastLocation.getLatitude(), lastLocation.getLongitude()) >= distance
@@ -87,6 +105,15 @@ public abstract class PositionProvider {
         }
     }
 
+    @Override
+    public void onConnectionSuspended() {
+        Log.i(TAG, "lost client suspended");
+    }
+
+    public void stopUpdates() {
+        apiClient.disconnect();
+    }
+
     public static double getBatteryLevel(Context context) {
         Intent batteryIntent = context.registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
         if (batteryIntent != null) {
diff --git a/app/src/main/java/org/traccar/client/ShortcutActivity.java b/app/src/main/java/org/traccar/client/ShortcutActivity.java
index 60a873f..9be79f7 100644
--- a/app/src/main/java/org/traccar/client/ShortcutActivity.java
+++ b/app/src/main/java/org/traccar/client/ShortcutActivity.java
@@ -15,11 +15,9 @@
  */
 package org.traccar.client;
 
-import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.location.Location;
-import android.location.LocationManager;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
 import android.support.annotation.DrawableRes;
@@ -34,7 +32,10 @@ import android.widget.ArrayAdapter;
 import android.widget.ListView;
 import android.widget.Toast;
 
-public class ShortcutActivity extends AppCompatActivity {
+import com.mapzen.android.lost.api.LocationServices;
+import com.mapzen.android.lost.api.LostApiClient;
+
+public class ShortcutActivity extends AppCompatActivity implements LostApiClient.ConnectionCallbacks {
 
     public static final String EXTRA_ACTION = "action";
     public static final String ACTION_START = "start";
@@ -43,6 +44,8 @@ public class ShortcutActivity extends AppCompatActivity {
 
     private static final String ALARM_SOS = "sos";
 
+    private LostApiClient apiClient;
+
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -99,16 +102,16 @@ public class ShortcutActivity extends AppCompatActivity {
         setResult(RESULT_OK, ShortcutManagerCompat.createShortcutResultIntent(this, shortcut));
     }
 
-    @SuppressWarnings("MissingPermission")
     private void sendAlarm() {
+        apiClient = new LostApiClient.Builder(this).addConnectionCallbacks(this).build();
+    }
+
+    @SuppressWarnings("MissingPermission")
+    @Override
+    public void onConnected() {
         SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
 
-        LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
-
-        Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
-        if (location == null) {
-            location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
-        }
+        Location location = LocationServices.FusedLocationApi.getLastLocation(apiClient);
 
         if (location != null) {
 
@@ -133,6 +136,12 @@ public class ShortcutActivity extends AppCompatActivity {
         } else {
             Toast.makeText(this, R.string.status_send_fail, Toast.LENGTH_SHORT).show();
         }
+
+        apiClient.disconnect();
+    }
+
+    @Override
+    public void onConnectionSuspended() {
     }
 
     private boolean executeAction(Intent intent) {
diff --git a/app/src/main/java/org/traccar/client/SimplePositionProvider.java b/app/src/main/java/org/traccar/client/SimplePositionProvider.java
deleted file mode 100644
index 3062ba7..0000000
--- a/app/src/main/java/org/traccar/client/SimplePositionProvider.java
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.client;
-
-import android.content.Context;
-import android.location.Location;
-import android.location.LocationListener;
-import android.location.LocationManager;
-import android.os.Bundle;
-import android.util.Log;
-
-@SuppressWarnings("MissingPermission")
-public class SimplePositionProvider extends PositionProvider implements LocationListener {
-
-    public SimplePositionProvider(Context context, PositionListener listener) {
-        super(context, listener);
-        if (!type.equals(LocationManager.NETWORK_PROVIDER)) {
-            type = LocationManager.GPS_PROVIDER;
-        }
-    }
-
-    public void startUpdates() {
-        try {
-            locationManager.requestLocationUpdates(type, requestInterval, 0, this);
-        } catch (IllegalArgumentException e) {
-            Log.w(TAG, e);
-        }
-    }
-
-    public void stopUpdates() {
-        locationManager.removeUpdates(this);
-    }
-
-    @Override
-    public void onLocationChanged(Location location) {
-        updateLocation(location);
-    }
-
-    @Override
-    public void onStatusChanged(String provider, int status, Bundle extras) {
-    }
-
-    @Override
-    public void onProviderEnabled(String provider) {
-    }
-
-    @Override
-    public void onProviderDisabled(String provider) {
-    }
-
-}
diff --git a/app/src/main/java/org/traccar/client/TrackingController.java b/app/src/main/java/org/traccar/client/TrackingController.java
index 52e516d..2d9b478 100644
--- a/app/src/main/java/org/traccar/client/TrackingController.java
+++ b/app/src/main/java/org/traccar/client/TrackingController.java
@@ -57,11 +57,7 @@ public class TrackingController implements PositionProvider.PositionListener, Ne
         this.context = context;
         handler = new Handler();
         preferences = PreferenceManager.getDefaultSharedPreferences(context);
-        if (preferences.getString(MainFragment.KEY_PROVIDER, "gps").equals("mixed")) {
-            positionProvider = new MixedPositionProvider(context, this);
-        } else {
-            positionProvider = new SimplePositionProvider(context, this);
-        }
+        positionProvider = new PositionProvider(context, this);
         databaseHelper = new DatabaseHelper(context);
         networkManager = new NetworkManager(context, this);
         isOnline = networkManager.isOnline();
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 603f132..2089a9e 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -20,11 +20,11 @@
   <string name="settings_status_on">Stop</string>
   <string name="settings_status_off_summary">Service stopped</string>
   <string name="settings_status_on_summary">Service running</string>
-  <string name="settings_provider_title">Location provider</string>
-  <string name="settings_provider_summary">Source of location data</string>
-  <string name="settings_provider_gps">GPS provider</string>
-  <string name="settings_provider_network">Network provider</string>
-  <string name="settings_provider_mixed">Mixed provider</string>
+  <string name="settings_accuracy_title">Location accuracy</string>
+  <string name="settings_accuracy_summary">Desired location accuracy</string>
+  <string name="settings_accuracy_high">High</string>
+  <string name="settings_accuracy_medium">Medium</string>
+  <string name="settings_accuracy_low">Low</string>
   <string name="settings_foreground_title">Foreground service</string>
   <string name="settings_foreground_summary">Increase service priority</string>
   <string name="menu_status">Status</string>
diff --git a/app/src/main/res/values/values.xml b/app/src/main/res/values/values.xml
index 7fe1396..9f3c554 100644
--- a/app/src/main/res/values/values.xml
+++ b/app/src/main/res/values/values.xml
@@ -3,16 +3,16 @@
 
     <string name="settings_url_default_value" translatable="false">http://demo.traccar.org:5055</string>
 
-    <string-array name="settings_provider_values" translatable="false">
-        <item>gps</item>
-        <item>network</item>
-        <item>mixed</item>
+    <string-array name="settings_accuracy_values" translatable="false">
+        <item>high</item>
+        <item>medium</item>
+        <item>low</item>
     </string-array>
 
-    <string-array name="settings_provider_names">
-        <item>@string/settings_provider_gps</item>
-        <item>@string/settings_provider_network</item>
-        <item>@string/settings_provider_mixed</item>
+    <string-array name="settings_accuracy_names">
+        <item>@string/settings_accuracy_high</item>
+        <item>@string/settings_accuracy_medium</item>
+        <item>@string/settings_accuracy_low</item>
     </string-array>
 
 </resources>
diff --git a/app/src/main/res/xml/preferences.xml b/app/src/main/res/xml/preferences.xml
index 941eae5..c69f09a 100644
--- a/app/src/main/res/xml/preferences.xml
+++ b/app/src/main/res/xml/preferences.xml
@@ -20,6 +20,14 @@
         android:summary="@string/settings_url_summary"
         android:title="@string/settings_url_title" />
 
+    <ListPreference
+        android:defaultValue="medium"
+        android:entries="@array/settings_accuracy_names"
+        android:entryValues="@array/settings_accuracy_values"
+        android:key="accuracy"
+        android:summary="@string/settings_accuracy_summary"
+        android:title="@string/settings_accuracy_title" />
+
     <EditTextPreference
         android:defaultValue="300"
         android:key="interval"
@@ -41,12 +49,4 @@
         android:summary="@string/settings_angle_summary"
         android:title="@string/settings_angle_title" />
 
-    <ListPreference
-        android:defaultValue="gps"
-        android:entries="@array/settings_provider_names"
-        android:entryValues="@array/settings_provider_values"
-        android:key="provider"
-        android:summary="@string/settings_provider_summary"
-        android:title="@string/settings_provider_title" />
-
 </PreferenceScreen>