NetWorker features:
‣ Fully customizable view. You can view the following properties (both download and upload is supported):
• Speed
• Session Traffic
• Graph
• Total Traffic
• Resettable Traffic.
‣ You can choose the network adapter to observe. Both wired and wireless adapters are supported!
‣ Adjustable refresh interval.
‣ Choose between a byte- or bit-mode.
‣ Use either colored or black/white icons in the menu bar.
‣ Support for auto start.
‣ Traffic Overview: Use this feature if you are on a volume limited plan.

What's New in Version 3.0.0
I am proud to present you another major update for NetWorker - and with this one, you pretty much get an entirely new app! Major parts of the source code were rewritten and the concept of the popover menu was reconsidered.

• You no longer have to select the network adapter manually - the currently active network adapter is detected and chosen automatically!
• The concept of using a popover menu was discarded. You can open a window by clicking on the view in the menu bar. This allows the app to show more information (the menu bar extra is still available).
• The new window contains two new graphs that display the upload and download speeds.
• You can now open an overlay window that shows the download- and upload speed. This window always stays on top and is useful for when you are using fullscreen apps or playing games.
• The traffic tab was improved. You can filter the total traffic by month, week or day. The data is displayed in a nice graph.
• The IP4 and IP6 address of the currently active adapter is shown.
• New icons with new color scheme.
• Instead of skipping the first refresh cycle, a valid value is shown when the app is started.

Compatibility: OS X 10.10 or later, 64-bit processor

Home Page - https://itunes.apple.com/us/app/networker-show-network-information-in-menu-bar/id1163602886