Privacy policy

Firewall by Zanoshky. Last updated October 2026.

What we collect

Nothing. Firewall (“the App”) has no account, no analytics, no crash reporting, no advertising and no server run by us. We never receive your data, so we cannot sell it, share it or lose it.

What stays on your phone

The App runs a local VPN on your phone that sees the names your apps look up, such as example.com, and decides whether to answer them. Your per app modes, your domain rules, the activity log and the counters are kept in the App's own storage on your phone. The log is deleted after 7 days, or after 30 or 90 days if you choose that in Settings. A backup file is only written when you make one, to a place you pick.

What leaves your phone, and where it goes

The App does not route your traffic through any server. These are the only times it talks to the internet:

• Lookups you allow. To answer a name your app asked for, the App passes the lookup on, as your phone would without it. With DNS over HTTPS on, it goes encrypted to the provider you chose (Google, Cloudflare, Quad9, AdGuard, or an address you typed in). With it off, it goes to your network's own DNS server. That provider sees the name and your IP address, under its own privacy policy. Lookups the App blocks go nowhere.
• Tracker lists. When you download or refresh a list, the App fetches it from the address shown next to it. That site sees an ordinary download request.
• Firewall Pro. If you buy Pro, Google Play handles the purchase under Google's privacy policy. The App only asks Google Play whether Pro is owned. We never see your payment details.

Permissions

• VPN service: runs the local VPN that filters lookups on your phone.
• Query all packages: lists your installed apps so you can set a mode for each one.
• Internet: passes allowed lookups on and downloads the lists you choose.
• Usage access (optional): only if you set a daily data cap. It reads how much mobile data each app used today, on your phone, to know when a cap is reached.
• Notifications: the notification that shows the firewall is on, and the summary and alerts you turn on.
• Boot completed and foreground service: start the firewall after a restart and keep it running.
• Billing: lets you buy Firewall Pro through Google Play.

Children

The App is not directed at children and collects no data from anyone.

Changes

If this policy changes, the new version is posted on this page with a new date.

Contact

Marko Zanoški, marko@zanoski.com