code: private static boolean validateVersion(Context ctx, ChangeLog clog){
  
          // Get Preferences
          SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(ctx);
          int lastSeen = prefs.getInt(PREF_CHANGELOG_LAST_SEEN, -1);
  
          // Second sort versions by it's code
          int latest = Integer.MIN_VALUE;
          for(Version version: clog.versions){
              if(version.code > latest){
                  latest = version.code;
              }
          }
  
          // Get applications current version
          if(latest > lastSeen){
              if(!BuildConfig.DEBUG) prefs.edit().putInt(PREF_CHANGELOG_LAST_SEEN, latest).apply();
              return true;
          }
  
          return false;
      }
docs: Validate the last seen stored verion code against the current changelog configuration
  to see if there is any updates and whether or not we should show the changelog dialog when
  called.
  
  @param ctx
  @param clog
  @return