diff --git a/app/src/main/java/org/nuclearfog/twidda/adapter/FontAdapter.java b/app/src/main/java/org/nuclearfog/twidda/adapter/FontAdapter.java
index b92c25ef..213c1fb4 100644
--- a/app/src/main/java/org/nuclearfog/twidda/adapter/FontAdapter.java
+++ b/app/src/main/java/org/nuclearfog/twidda/adapter/FontAdapter.java
@@ -50,7 +50,9 @@ public class FontAdapter extends BaseAdapter {
 
     private GlobalSettings settings;
 
-
+    /**
+     * @param settings app settings for background and font color
+     */
     public FontAdapter(GlobalSettings settings) {
         this.settings = settings;
     }
diff --git a/app/src/main/java/org/nuclearfog/twidda/adapter/ListAdapter.java b/app/src/main/java/org/nuclearfog/twidda/adapter/ListAdapter.java
index 7ca314f0..9914d626 100644
--- a/app/src/main/java/org/nuclearfog/twidda/adapter/ListAdapter.java
+++ b/app/src/main/java/org/nuclearfog/twidda/adapter/ListAdapter.java
@@ -52,14 +52,21 @@ public class ListAdapter extends Adapter<ViewHolder> {
      */
     private static final int ITEM_LIST = 1;
 
+    /**
+     * locale specific number format
+     */
+    private static final NumberFormat NUM_FORMAT = NumberFormat.getIntegerInstance();
+
     private ListClickListener listener;
     private GlobalSettings settings;
 
-    private NumberFormat formatter = NumberFormat.getIntegerInstance();
     private UserLists data = new UserLists();
     private int loadingIndex = NO_LOADING;
 
-
+    /**
+     * @param settings app settings for theme
+     * @param listener item click listener
+     */
     public ListAdapter(GlobalSettings settings, ListClickListener listener) {
         this.listener = listener;
         this.settings = settings;
@@ -202,8 +209,8 @@ public class ListAdapter extends Adapter<ViewHolder> {
                 vh.textViews[2].setText(owner.getUsername());
                 vh.textViews[3].setText(owner.getScreenname());
                 vh.textViews[4].setText(formatCreationTime(item.getCreatedAt()));
-                vh.textViews[5].setText(formatter.format(item.getMemberCount()));
-                vh.textViews[6].setText(formatter.format(item.getSubscriberCount()));
+                vh.textViews[5].setText(NUM_FORMAT.format(item.getMemberCount()));
+                vh.textViews[6].setText(NUM_FORMAT.format(item.getSubscriberCount()));
                 if (settings.getImageLoad() && owner.hasProfileImage()) {
                     String pbLink = owner.getImageLink();
                     if (!owner.hasDefaultProfileImage())
diff --git a/app/src/main/java/org/nuclearfog/twidda/adapter/TrendAdapter.java b/app/src/main/java/org/nuclearfog/twidda/adapter/TrendAdapter.java
index b97969e0..20efd959 100644
--- a/app/src/main/java/org/nuclearfog/twidda/adapter/TrendAdapter.java
+++ b/app/src/main/java/org/nuclearfog/twidda/adapter/TrendAdapter.java
@@ -30,12 +30,23 @@ import static androidx.recyclerview.widget.RecyclerView.NO_POSITION;
  */
 public class TrendAdapter extends Adapter<ViewHolder> {
 
+    /**
+     * Max trend count Twitter API returns
+     */
+    private static final int INIT_COUNT = 50;
+
+    /**
+     * Locale specific number format
+     */
+    private static final NumberFormat NUM_FORMAT = NumberFormat.getIntegerInstance();
+
+
     private TrendClickListener itemClickListener;
+    private List<Trend> trends = new ArrayList<>(INIT_COUNT);
 
-    private NumberFormat formatter = NumberFormat.getIntegerInstance();
-    private List<Trend> trends = new ArrayList<>();
-
-
+    /**
+     * @param itemClickListener Listener for item click
+     */
     public TrendAdapter(TrendClickListener itemClickListener) {
         this.itemClickListener = itemClickListener;
     }
@@ -102,7 +113,7 @@ public class TrendAdapter extends Adapter<ViewHolder> {
         holder.textViews[1].setText(trend.getName());
         if (trend.hasRangeInfo()) {
             Resources resources = holder.textViews[2].getContext().getResources();
-            String trendVol = formatter.format(trend.getRange()) + " " + resources.getString(R.string.trend_range);
+            String trendVol = NUM_FORMAT.format(trend.getRange()) + " " + resources.getString(R.string.trend_range);
             holder.textViews[2].setText(trendVol);
             holder.textViews[2].setVisibility(VISIBLE);
         } else {
diff --git a/app/src/main/java/org/nuclearfog/twidda/adapter/TweetAdapter.java b/app/src/main/java/org/nuclearfog/twidda/adapter/TweetAdapter.java
index c0252b1b..d8bd6c3c 100644
--- a/app/src/main/java/org/nuclearfog/twidda/adapter/TweetAdapter.java
+++ b/app/src/main/java/org/nuclearfog/twidda/adapter/TweetAdapter.java
@@ -22,7 +22,7 @@ import org.nuclearfog.twidda.backend.items.User;
 import org.nuclearfog.twidda.database.GlobalSettings;
 
 import java.text.NumberFormat;
-import java.util.ArrayList;
+import java.util.LinkedList;
 import java.util.List;
 
 import jp.wasabeef.picasso.transformations.RoundedCornersTransformation;
@@ -63,14 +63,22 @@ public class TweetAdapter extends Adapter<ViewHolder> {
      */
     private static final int MIN_COUNT = 2;
 
+    /**
+     * Locale specific number format
+     */
+    private static final NumberFormat NUM_FORMAT = NumberFormat.getIntegerInstance();
+
+
     private TweetClickListener itemClickListener;
     private GlobalSettings settings;
 
-    private final List<Tweet> tweets = new ArrayList<>();
-    private NumberFormat formatter = NumberFormat.getIntegerInstance();
+    private final List<Tweet> tweets = new LinkedList<>();
     private int loadingIndex = NO_LOADING;
 
-
+    /**
+     * @param settings          App settings for theme
+     * @param itemClickListener listener for item click
+     */
     public TweetAdapter(GlobalSettings settings, TweetClickListener itemClickListener) {
         this.itemClickListener = itemClickListener;
         this.settings = settings;
@@ -272,8 +280,8 @@ public class TweetAdapter extends Adapter<ViewHolder> {
             tweetItem.textViews[2].setText(text);
             tweetItem.textViews[0].setText(user.getUsername());
             tweetItem.textViews[1].setText(user.getScreenname());
-            tweetItem.textViews[3].setText(formatter.format(tweet.getRetweetCount()));
-            tweetItem.textViews[4].setText(formatter.format(tweet.getFavoriteCount()));
+            tweetItem.textViews[3].setText(NUM_FORMAT.format(tweet.getRetweetCount()));
+            tweetItem.textViews[4].setText(NUM_FORMAT.format(tweet.getFavoriteCount()));
             tweetItem.textViews[6].setText(formatCreationTime(tweet.getTime()));
 
             if (tweet.retweeted()) {
diff --git a/app/src/main/java/org/nuclearfog/twidda/adapter/UserAdapter.java b/app/src/main/java/org/nuclearfog/twidda/adapter/UserAdapter.java
index 5263933e..9aa4de93 100644
--- a/app/src/main/java/org/nuclearfog/twidda/adapter/UserAdapter.java
+++ b/app/src/main/java/org/nuclearfog/twidda/adapter/UserAdapter.java
@@ -51,9 +51,9 @@ public class UserAdapter extends Adapter<ViewHolder> {
     private static final int ITEM_GAP = 1;
 
     /**
-     * Number formatter
+     * locale specific number formatter
      */
-    private static final NumberFormat FORMATTER = NumberFormat.getIntegerInstance();
+    private static final NumberFormat NUM_FORMAT = NumberFormat.getIntegerInstance();
 
     private UserClickListener listener;
     private GlobalSettings settings;
@@ -214,8 +214,8 @@ public class UserAdapter extends Adapter<ViewHolder> {
             UserHolder userholder = (UserHolder) holder;
             userholder.textViews[0].setText(user.getUsername());
             userholder.textViews[1].setText(user.getScreenname());
-            userholder.textViews[2].setText(FORMATTER.format(user.getFollowing()));
-            userholder.textViews[3].setText(FORMATTER.format(user.getFollower()));
+            userholder.textViews[2].setText(NUM_FORMAT.format(user.getFollowing()));
+            userholder.textViews[3].setText(NUM_FORMAT.format(user.getFollower()));
             if (user.isVerified()) {
                 userholder.verifyIcon.setVisibility(VISIBLE);
             } else {