App Firewall: Network Monitor
Blocker, traffic & data usage
Only for Mac
Free · In‑App Purchases
Mac
See which apps connect to the internet - and block the ones that shouldn't. A real-time network monitor and firewall for your Mac. Private and on-device.
App Firewall shows you what your Mac is really doing on the network - and puts you back in control.
Every app, background service and helper on your Mac quietly connects to the internet. App Firewall reveals every one of those connections in real time, shows where the data goes, and lets you block anything you don't trust with a single click.
No account. No data collection. Everything runs on your Mac.
WATCH YOUR NETWORK LIVE
• See every connection as it happens - the app, the destination, the country and the traffic
• Live per-app traffic right in the menu bar, updated every second
• Search and filter connections by app, host or status
BLOCK WHAT YOU DON'T TRUST
• Take any app off the internet with a single switch
• Block ads, trackers and telemetry with curated block lists
• Write your own domain rules with wildcards (*.example.com)
• Allowlist mode: block everything except the apps you approve
UNDERSTAND YOUR TRAFFIC
• Clear charts for the last hour, today, 7 days and 30 days
• Your biggest data-using apps at a glance
• Upload and download totals with connection counts
SEE WHERE YOUR DATA GOES
• A world map of every server your apps connect to, using an on-device location database
• Country flags and cities on each connection
• First-contact alerts when an app reaches a brand-new server
STAY IN CONTROL
• Pause protection for 15 minutes, 1 hour, 8 hours, until restart, or until you resume
• Launch at login and live quietly in the menu bar
• Export and import your rules; export connections to CSV
PRIVACY BY DESIGN
App Firewall never sends your browsing or connection data anywhere. No analytics, no login, no cloud. Location lookups use an on-device database, so nothing about your traffic ever leaves your Mac.
FREE & PRO
Free includes the live connection monitor, app traffic overview, 1-hour and today statistics, and blocking up to 3 apps.
Pro unlocks unlimited app blocking, domain rules and curated block lists, allowlist mode, 7- and 30-day history, the connection map, first-contact alerts, and export/import.
App Firewall Pro is available as a one-time Lifetime purchase or an annual plan with a 7-day free trial. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period; manage or cancel anytime in your App Store account settings.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Take back control of your Mac's network. Download App Firewall and see what's really connecting.
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Profiles that follow the network you are on.
• Give a network a name and a policy. Home can stay relaxed while any network you have never seen before switches you to something stricter, and the change happens on its own. Networks are told apart by their gateway, so App Firewall never has to ask for your location.
Rules that keep a schedule.
• Any rule can carry days and hours, including windows that run past midnight. Block a distraction between nine and six, or shut something down while you sleep. The schedule is enforced by the network sensor itself, so it keeps working with the app closed.
Data budgets, per app.
• Give an app an allowance for the day, the week or the month. When it runs out you either get a warning, or that app comes off the network until the budget resets.
A privacy report that names names.
• Destinations are matched against a catalogue of ad exchanges, analytics services, telemetry endpoints and delivery networks that ships inside the app. You get a privacy score for every app with its reasoning shown, a breakdown of what your traffic was actually for, and the companies behind the hostnames. Export the whole report as PDF or CSV.
Anomaly detection that runs entirely on your Mac.
• Every app is measured against its own history: a country it has never reached, an hour it has never worked at, a burst of destinations it has never used, an hour of traffic beyond anything it has moved before. Baselines come from your own database and never leave the machine.
A rebuilt interface.
• The sidebar is now grouped into Monitor, Control, Insight and Traffic, every screen opens with the same kind of header, and the setup guide explains what the app does before asking for permission to do it.
A stronger boundary around the app itself.
• App Firewall's network sensor now verifies the code signature of anything trying to talk to it, so only App Firewall itself can read your connection data or change your rules. This is the kind of thing you should be able to take for granted in a firewall, and now you can.
Lighter on your Mac.
• Background CPU is down sharply while idle, the menu bar popover no longer wakes your Mac when it isn't open, and large connection histories no longer make the interface stall.
Protection that stays on.
• If App Firewall's saved rules can't be read at startup - a damaged file, a cleanup tool, a failed migration - it now holds your last known protection level instead of quietly letting everything through. Allowlist mode stays Allowlist mode.
Allowlist mode is tighter.
• An app you have explicitly blocked stays blocked, even on your local network. System DNS is protected properly rather than by leaving a port open to everything. And a remote machine can no longer slip through by choosing a lucky source port.
Blocking an app now covers the whole app.
• Chrome, Slack and other Electron apps send traffic from helper processes. Blocking the app now covers them too.
Fresher location data.
• The bundled IP location database has been updated.
The developer, Igor Bidenko, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Igor Bidenko
- Size
- 38 MB
- Category
- Utilities
- Compatibility
Requires macOS 13.0 or later.
- Mac
Requires macOS 13.0 or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- App Firewall - Annual $19.99
- App Firewall - Monthly $4.99
- App Firewall - Lifetime $39.99
- Copyright
- © Igor Bidenko
