Nullgen AI Blocker

Nullgen

In-app purchases

About this app

Nullgen AI Blocker is a parental-control and content-blocking app for families, schools, and workplaces. It stops AI chatbots and AI websites from working on this phone or tablet — in Chrome, other browsers, and the apps themselves. Set it up once and it stays on.

Part of the Nullgen AI Blocker suite
• Browser extensions for Chrome, Edge, Firefox, and Safari — detect AI prompt boxes on any website and stop typing and pasting into them, on the device.
• Android app (this app) — blocks known AI apps and websites across most websites and apps on the device.
• Apps for other phones, tablets, and desktops with the same protection.
One Nullgen Pro account covers every device, with the same rules and the same approvals everywhere.

What it blocks
ChatGPT, Gemini, Claude, Copilot, Perplexity, DeepSeek, Character.AI, and more than 90 other AI services. Nullgen keeps the list up to date, so new tools are covered without an app update.

How it works
To work, the app asks Android for permission to set up a VPN. That VPN is used only to filter AI destinations on this device. It is not a traditional VPN: your traffic is never routed through Nullgen or anyone else, and nothing you browse is sent to our servers. When an app or browser tries to reach a known AI destination, the request is answered on the device and simply does not load. Everything else works normally. A small notification shows while blocking is on, which keeps Android from stopping it in the background.

No off switch
There is no button in the app to pause or disable blocking. That is the point: the person holding the phone is often not the person who installed it.

Free blocks all AI
Choose Free and blocking starts with no account and no card. It keeps working for as long as the app is installed.

Nullgen Pro — Family
Subscribe in the app, then link this phone or tablet to your Nullgen account at nullgen.ai/link. Once it is linked, a parent can:
• Approve or deny access requests. A child taps "Request AI access", picks the tool and how long they need it, and the parent approves from the Nullgen dashboard. The tool unblocks for exactly that time — fifteen minutes, an hour, a day, or permanently.
• Set allow and deny rules per AI tool for each child.
• Cover every device in the household under one subscription: browser extensions plus the apps for phones, tablets, and desktops.

Nullgen Pro — Educators and Enterprise
Schools and companies deploy Nullgen to managed Android devices with Android Enterprise, enroll them silently, and route AI access requests to named approvers. Learn more and sign up at nullgen.ai.

Privacy
• Blocking decisions are made on the device.
• Nullgen never receives which sites you visit or what you type.
• Free creates no account.
• Access requests contain only the tool, the duration, and an optional note you write.
• Crash reports contain no browsing data, site names, or lookups.
• Nullgen does not sell, share, or disclose any data from this app to third parties, and does not use it for advertising.
Privacy Policy: https://nullgen.ai/privacy

What it does not do
AI features built into services that share ordinary hosts — such as AI answers inside a search engine or a social app — are not blocked separately, because blocking them would block the whole service. On a personal phone, Android still lets the VPN be removed in Settings; that is an operating-system limit. Setting Nullgen as the Always-on VPN keeps blocking on after a restart or an update, and on managed devices an administrator can lock that setting.

Subscription terms
Nullgen Pro Family is a monthly or yearly auto-renewing subscription, billed through your Google Play account. The subscription renews automatically until you cancel it. Manage or cancel any time in the Google Play app › Profile › Payments & subscriptions › Subscriptions; you keep Pro until the end of the period you paid for.
Terms of Service: https://nullgen.ai/terms

What’s new

Initial release