Per-app traffic & live connections
Block by domain, IP or app
Daily data limits for hotspots
Get Watchtower and every other SunTeame Mac app for $9/month or $99 once.
See everything your Mac sends online. Block what you don’t want.
Your Mac talks to the internet all day, and most of it happens out of sight. Watchtower puts it on screen: today’s total, live download and upload speed, who is online right now and every host each app is connected to. When something should not be online, block it by domain, by IP address or subnet, or by app — or just get notified. On a phone hotspot, give a profile a daily limit and Watchtower warns you before the data runs out.
Shows which apps on your Mac use the network, where they connect and how much data they use. Block a domain, an address or a whole app in one click, and set daily data limits for hotspots.
Live download and upload speed, with data used today per app and in total
Every open connection: host name, address, port, protocol and volume
Blocking rules by domain, IP address or subnet, or app
Daily data limits for each profile and budgets for individual apps
Home, Café and Hotspot profiles that switch automatically on an expensive network
Alerts for new apps going online, risky ports and unusually large uploads
The overview shows today’s total, live speed and anything that needs your attention. Open the app list to see who is online right now, and open any app to see every host it is connected to.
When something should not be online, block it. Rules take effect on new connections straight away through a system-level network filter. If you only want to keep an eye on something, set the rule to notify instead.
On a phone hotspot every megabyte counts. Give a profile a daily limit, give hungry apps their own budget, and Watchtower warns you before the data runs out.
Watchtower does not send your network data anywhere. Statistics, rules and history are stored locally on your Mac — no cloud and no analytics.
macOS 14.6 or later · Mac with Apple silicon · Blocking uses a network extension, which macOS asks you to approve once in System Settings
English and Russian
Built with SwiftUI and Apple’s Network Extension framework — a system-level content filter that applies your rules to new connections.
Find the app that is eating your data
Stop background traffic on a phone hotspot
Block telemetry and ad domains system-wide
Get alerted when a new app goes online
Open Watchtower. The app list shows who is online right now and how much data each app has used today, and opening an app shows every host it is connected to, with address, port, protocol and volume.
Add a rule for the app in Watchtower. Rules work by app, by domain, or by IP address or subnet, and they apply to new connections straight away through a system-level network filter.
Yes. Give the Hotspot profile a daily limit and give hungry apps their own budget. Watchtower warns you at 80% and again when the limit runs out, and can stop the traffic for you once a limit is reached.
No. Statistics, rules and history are stored locally on your Mac. There is no cloud and no analytics.
Blocking uses Apple’s Network Extension framework, so macOS asks you to approve the Watchtower filter once in System Settings.
It covers the everyday jobs of both: per-app traffic and live connections, blocking rules by domain, address or app, and daily data limits with profiles for home, café and hotspot networks.
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