All comparisonsFirewall No Root: App Firewall and NetCageA no-root Android firewall from Germany that allows or blocks internet per app, separately for Wi-Fi and cellular, with optional host rules and a DNS changer.Last checked 7 November 2026Check Firewall No Root: App Firewall’s own pageYou can’t install NetCage todayIt has no store listing and no public download, so there’s no install link on this page and no price to quote. If you need something on your phone now, Firewall No Root: App Firewall is there to install and NetCage isn’t.Better served by Firewall No Root: App FirewallChoose Firewall No Root if you want host and domain rules, filter lists and a DNS changer beside the per-app switch, and it is on Google Play today.Better served by NetCageChoose NetCage if you want the switch and nothing else to manage: no lists to update, no DNS to change, and shareable Cage Packs when a friend wants your setup.Row by rowNetCage’s column comes from its code. Firewall No Root: App Firewall’s comes from the linked pages. “Not stated” means we didn’t find it there, not that it’s missing.

Feature

Firewall No Root: App Firewall

NetCage

Blocks one chosen app’s internet

Yes play.google.com

Yes

Keeps blocking while the app is in the background

Not stated on the pages we checked

Yes

Needs no root

Yes play.google.com

Yes

Open source

Not stated on the pages we checked

Shows ads

No play.google.com

Partly. Promotions for the developer’s own apps only. No ad network.

In-app purchases

Yes play.google.com

What it costs

App: Free. Free install on Google Play; the listing carries an In-app purchases label at $0.99 - $16.99 per item play.google.com

NetCage publishes no price.Where NetCage falls short

It takes Android’s one VPN slot. While NetCage is up you can’t run another VPN, and connecting one stops NetCage.

Apps that share an Android user ID are caged together, and there’s no way to separate them.

A caged app can still hand a link to a browser you haven’t caged, and that browser connects as normal.

It doesn’t work inside an app: no domain rules, no block lists, no traffic log. An app is caged or it isn’t.

NetCage isn’t open source, so you can’t read its code.

Every limit, in the documentationComing from Firewall No Root: App Firewall?The documentation has a page on how the two differ and which of its guides to read first. Read it on the documentation siteIf a row here is wrong, tell us and we’ll open the page again. Contact