NetworkUI is a macOS menubar app born from the suspicion that something on your computer is always phoning home, and the morbid curiosity to find out what. It quietly polls the system's nettop utility to reveal which applications are devouring your bandwidth, how aggressively, and for how long, then presents the findings in a compact dashboard you can summon from your menubar whenever paranoia strikes.
It offers live speed gauges, per-app usage rankings with sparklines for the visually inclined, a connection inspector that resolves hostnames so you can see exactly which servers your apps are whispering to, bandwidth alerts for when something decides to download the entire internet without asking, and CSV export for anyone who wants to graph their disillusionment in a spreadsheet. It polls every two seconds when you are watching and slows to a leisurely ten when you look away, because even surveillance software should know when to take a break.
