A modern Samsung, LG, or Roku TV makes more than a thousand outbound requests a day, most of them to ACR (automatic content recognition) endpoints and ad brokers. Point a Pi-hole at your network for a week and the block-count graph for the living room device dwarfs everything else in the house. If you want the TV to keep working but stop sending frame-by-frame telemetry to whoever’s listening, these seven best apps for smart TV privacy blocking on desktop are the toolkit. Most run once and cover every device on the network, which is why this is a “desktop” or home-server list rather than a mobile app roundup.
What to look for in a smart TV privacy tool
- DNS-level blocking, so every device on the network is covered without an app on each one.
- Curated block lists targeting ACR, telemetry, and ad networks specifically. Generic ad-block lists miss half of what a TV sends.
- Allow-list flexibility, so essential domains (subtitles, DRM handshake, catalog updates) stay reachable.
- Per-device profiles, so the kids’ tablet gets different rules than the living room TV.
- Real logging, so you can see what got blocked and adjust before a streaming service breaks.
- Local-first or transparent cloud, since sending your entire DNS query stream to a third party defeats the point of the exercise.
Quick comparison
| App | Best for | Platforms | Free plan | Starting price/mo | Rating |
|---|---|---|---|---|---|
| Pi-hole | Self-hosted DNS ad-block | Linux, Docker, Raspberry Pi | Free | Free | 4.8 |
| AdGuard Home | Self-hosted with a cleaner UI | Windows, Mac, Linux, Docker | Free | Free | 4.7 |
| NextDNS | Cloud DNS with TV-focused lists | All (DNS config) | Free (300k queries/mo) | $1.99/mo | 4.7 |
| ControlD | Cloud DNS with per-device profiles | All (DNS config) | Free tier | $1.99/mo | 4.6 |
| Portmaster | Desktop app-level firewall | Windows, Linux | Free | Free | 4.5 |
| OPNsense | Full router firewall with DNS | Firewall appliance / VM | Free | Free | 4.7 |
| Little Snitch | macOS per-app network monitor | macOS | 30-day demo | $59 one-time | 4.7 |
The apps
1. Pi-hole, Best for self-hosted DNS ad-block
Pi-hole is the reference DNS sinkhole for home networks. Point your router’s DNS to a Pi-hole instance (Raspberry Pi, small VM, or Docker container), and every device on the LAN gets ad and tracker blocking without an app installed. Community-maintained block lists for smart TVs are strong, and the query log is the most useful part when you want to see what a TV is actually doing.
Where it falls short: setup expects some CLI comfort. The web UI is functional, not polished. Client identification for TV-specific rules needs a bit of manual config.
Pricing:
- Free and open source
Platforms: Linux (Raspberry Pi, Debian, Ubuntu), Docker
Download: Publisher
Bottom line: The default pick for self-hosted TV blocking, and still the gold standard.
2. AdGuard Home, Best for self-hosted with a cleaner UI
AdGuard Home covers the same DNS-block ground as Pi-hole with a modern UI, native TLS support, DNS-over-HTTPS and DNS-over-QUIC upstream out of the box, and better per-client rule editing. Runs as a single binary on any OS.
Where it falls short: block-list ecosystem is smaller than Pi-hole’s, but the ones that ship are well-curated. Some routers proxy DNS in ways that require extra config.
Pricing:
- Free and open source
Platforms: Windows, macOS, Linux, FreeBSD, Docker
Download: GitHub
Bottom line: Best pick for anyone who wants Pi-hole’s function with a friendlier admin experience.
3. NextDNS, Best for cloud DNS with TV-focused lists
NextDNS is the cloud DNS service that most privacy-focused readers of Ars and XDA end up on. It ships pre-tuned TV block lists (Roku, Samsung Tizen, LG WebOS, Fire TV, Google TV, Apple TV telemetry) that you toggle rather than curate. Per-device profiles, encrypted DoH/DoT, and logs available or off entirely.
Where it falls short: cloud DNS means someone else sees your query stream. NextDNS has a strong privacy policy, but self-hosted is still stricter.
Pricing:
- Free: 300,000 queries/month (usually plenty for one household)
- Paid: $1.99/mo for unlimited queries and multiple profiles
Platforms: DNS config on any router or device, plus native clients
Download: Publisher
Bottom line: Best pick if you do not want to run a server but still want opinionated TV blocking.
4. ControlD, Best for cloud DNS with per-device profiles
ControlD approaches the same problem as NextDNS with a slightly different UX: rich per-device profiles, “custom rules” that can spoof responses (useful for TVs that refuse to work if a specific ACR domain fails outright), and a native app on more platforms including router firmwares.
Where it falls short: free tier is limited in features. The rule syntax has a learning curve.
Pricing:
- Free tier: profile blocking with default lists
- Paid: $1.99/mo Free Control D Pro (unlimited profiles, custom rules)
Platforms: DNS config on any router or device, native apps for Windows, macOS, Linux, Android, iOS
Download: Publisher
Bottom line: Best pick for households that want fine-grained per-device control without self-hosting.
5. Portmaster, Best for desktop app-level firewall
Portmaster is the open-source per-app firewall from Safing (the team behind SPN). It runs on Windows and Linux and lets you see and block outbound connections from every app, with per-app profiles. If your smart TV shares a screen mirror with your desktop, Portmaster catches the OS-side telemetry those mirror sessions kick off.
Where it falls short: does not run on the TV itself (nothing does, other than DNS blocking upstream). Best used alongside a DNS-block layer.
Pricing:
- Free and open source
- SPN (Safing Privacy Network) VPN companion is a separate paid product
Platforms: Windows, Linux
Download: Publisher
Bottom line: Best pick for augmenting DNS blocking with app-level visibility on desktop.
6. OPNsense, Best for full router firewall with DNS
OPNsense replaces your consumer router with an open-source firewall that includes Unbound (recursive DNS with block-list support), interface-level VLAN separation, and traffic monitoring. Run it on a Protectli or Netgate appliance, or virtualize on Proxmox. The DNS layer catches TV tracking, and the VLAN layer isolates the TV from your laptops.
Where it falls short: it is a full firewall replacement. Setup is a weekend project, not an afternoon.
Pricing:
- Free and open source (community edition)
- Business edition subscription available for enterprise support
Platforms: Runs on x86-64 firewall appliance or VM
Download: Publisher
Bottom line: Best pick for a full network overhaul with TV isolation baked in.
7. Little Snitch, Best for macOS per-app network monitor
Little Snitch is the macOS-native application firewall. Every outbound connection prompts once for approval. If you run a screen mirror or a Chromecast helper on macOS, Little Snitch shows exactly which endpoints your TV-adjacent apps are hitting. Combined with Pi-hole upstream, it closes the last per-Mac gap.
Where it falls short: macOS only. Cannot block TV traffic directly, but complements a DNS-blocker on the router side.
Pricing:
- 30-day demo mode
- Paid: $59 one-time (personal), family and business licenses available
Platforms: macOS
Download: Publisher
Bottom line: Best pick for Mac households that want per-app network visibility.
8. Blocky, Best for a lightweight self-hosted alternative
Blocky is a small DNS resolver written in Go, designed for home networks. Less UI than AdGuard Home, less community mass than Pi-hole, but startlingly fast and easy to run in Kubernetes or a docker-compose stack. Good pick for a homelab that already runs Prometheus and wants DNS metrics that plug in.
Where it falls short: no polished web UI. All configuration is YAML.
Pricing:
- Free and open source
Platforms: Docker, Linux, macOS, Windows
Download: GitHub
Bottom line: Best pick for the homelab crowd already familiar with YAML-configured infrastructure.
How to pick the right one
If you want the classic self-hosted route: Pi-hole.
If you want the modern UI with the same self-hosted freedom: AdGuard Home.
If you do not want to run a server: NextDNS or ControlD (pick NextDNS for simpler blocking, ControlD for more granular per-device rules).
If you want desktop app-level tracking on top of network blocking: Portmaster (Windows/Linux) or Little Snitch (macOS).
If you are rebuilding the whole network anyway: OPNsense with Unbound.
If you already run a homelab with metrics: Blocky.
FAQ
Will blocking smart TV telemetry break streaming?
Rarely, if you use TV-focused block lists. Content delivery, DRM handshakes, and subtitle CDNs live on different domains than the ACR and ad brokers, so blocking one does not affect the other. The exception is Samsung Tizen’s app store, which insists on a live connection to Samsung telemetry to load some apps.
Is Pi-hole better than a good router?
Pi-hole runs alongside the router. It is not a firewall replacement, but it gives you DNS-level blocking that even a strong consumer router does not do out of the box. OPNsense replaces the router entirely and includes DNS filtering.
Do I need to install anything on the TV?
No. All seven picks work at the network or DNS level, or on a nearby desktop. You do not install anything on the TV itself, which is by design (most smart TVs will not let you).
Which app is best for beginners?
NextDNS with the pre-configured TV lists. Sign up, copy the DNS endpoints into your router, done. No server to maintain.
Is cloud DNS a privacy risk?
Any DNS resolver you use, including your ISP’s, sees your query stream. NextDNS and ControlD have strong privacy policies, no-log modes, and encrypted transports. Self-hosted Pi-hole or AdGuard Home is stricter because nothing leaves your network unless you tell it to.