The simplest way to block a site on your phone depends on what you're trying to do

If you want to stop yourself or someone else from reaching a specific website on a phone, you have three main routes: use your phone's built-in content filter, install a third-party blocking app, or change your network settings. Which one works best depends on whether you're blocking sites for yourself, for a child, or across an entire household — and whether you want the block to be easy to remove or genuinely hard to bypass.

The built-in options on both Android and iPhone are free and require no extra software. Third-party apps give you more control and detailed reporting, but they cost money or show ads. Network-level blocking (through your router or internet provider) stops the sites from loading on any device in your home, but requires access to your WiFi settings.

Key Takeaways

  • iPhone's Screen Time feature and Android's Digital Wellbeing both block sites for free using your phone's built-in tools, though they're easier to bypass than network-level blocks.
  • Third-party apps like Bark, Google Family Link, and Apple's Parental Controls offer more detailed reporting and stronger restrictions, especially for monitoring children's activity.
  • Blocking at the router level (through your WiFi settings) stops blocked sites from loading on any device connected to that network, making it harder to circumvent.
  • If you're blocking sites for yourself, a simple app blocker or your phone's native tools usually work; if you're blocking for a child, network-level blocking combined with parental controls is more effective.

Using iPhone's Screen Time to block websites

On iPhone, Screen Time is the built-in tool for blocking sites. Open Settings, tap Screen Time, then tap Content & Privacy Restrictions. Turn on Content & Privacy Restrictions, then tap Allowed Apps and toggle off Safari (or any browser you want to restrict). Then go back and tap Content Restrictions, select Web Content, and choose Unrestricted Access, Limit Adult Websites, or Specific Websites Only.

If you choose Limit Adult Websites, iPhone will block sites it categorizes as adult content, though the filter is not perfect. If you choose Specific Websites Only, you can add a list of sites you want to allow and block everything else — or add specific sites to a "Never Allow" list instead. You can set a Screen Time passcode so the person using the phone cannot turn off the restrictions without that code.

The limitation: someone with physical access to the phone can reset Screen Time restrictions by going to Settings > General > Transfer or Reset > Reset > Reset Network Settings, which erases the passcode. This works only if they know the Apple ID password, but it's a way around the block.

Using Android's Digital Wellbeing and parental controls

On Android, Digital Wellbeing is the native tool, though it's less robust than iPhone's Screen Time for blocking specific sites. Open Settings, search for Digital Wellbeing, and tap it. You can set app timers and downtime schedules, but blocking individual websites requires a third-party app or your router settings.

For stronger control on Android, use Google Family Link, which is free and designed for parents monitoring children's devices. Install Family Link on both your phone and the child's phone, then you can set app restrictions, screen time limits, and location tracking from your own device. However, Family Link does not block specific websites directly — it blocks apps and sets overall screen time.

If you need to block specific sites on Android without a third-party app, your best option is to change the DNS settings on your phone or block sites through your router, both of which are covered below.

Installing a third-party app blocker

Apps like Bark, Qustodio, and Net Nanny let you block specific sites and monitor activity across devices. These apps typically cost $10 to $15 per month and require installation on the phone you want to monitor. They work by filtering traffic through their own servers, so they can block sites even on cellular data (not just WiFi).

Bark, for example, lets you block categories of sites (gambling, dating, violence) or specific URLs, and it sends you alerts if someone tries to visit a blocked site. Qustodio offers similar features plus screen time management and app blocking. These apps are stronger than built-in tools because they're harder to uninstall without the parent's password, and they work across WiFi and cellular.

The trade-off is cost and privacy: these apps see all the traffic on the phone, so you're trusting the company with browsing data. Read the privacy policy before installing. Some apps also slow down the phone slightly because they're filtering all traffic in the background.

Blocking sites through your router

If you want to block a site for everyone on your home WiFi network, log into your router's settings. Open a web browser, type your router's IP address (usually 192.168.1.1 or 192.168.0.1 — check the sticker on the router), and log in with your router's username and password (often admin/admin or admin/password by default).

Look for a section called Parental Controls, Access Control, or Firewall. Most routers let you block sites by domain name — type the site's address and save. The block applies to any device on that WiFi network, whether it's a phone, tablet, or computer. This is harder to bypass than phone-level blocking because the block happens before traffic even reaches the device.

The limitation: someone on cellular data can bypass this block entirely, and someone with router access can change the settings. If you want to prevent the latter, set a strong router password and do not share it.

Changing DNS settings to block sites

Another approach is to change your phone's DNS (Domain Name System) settings to use a filtering service. DNS is how your phone translates website names into addresses — by using a filtering DNS service, you can block sites without installing an app.

On iPhone, go to Settings > WiFi, tap the network name, tap Configure DNS, and change it from Automatic to Manual. Add the DNS address of a filtering service like Cloudflare's 1.1.1.2 (blocks malware) or OpenDNS (blocks adult sites). On Android, go to Settings > WiFi, long-press the network, tap Modify, tap Advanced Options, and change DNS to Manual, then enter the same addresses.

This method blocks sites across all apps on that WiFi network, not just the browser. The downside: it only works on WiFi, not cellular, and changing DNS requires access to the phone's settings — so it's not a strong parental control if the child knows how to undo it.

Blocking sites for yourself versus for others

If you're blocking sites to reduce your own screen time or avoid distractions, your phone's built-in tools (Screen Time on iPhone, Digital Wellbeing on Android) are usually enough. Set them up, create a passcode you won't remember, and ask someone else to store it. The goal is to make it inconvenient enough that you won't bypass it in a moment of weakness.

If you're blocking sites for a child or teenager, combine multiple methods: use parental controls on the device itself, block at the router level, and monitor activity with an app like Bark or Family Link. This layered approach is harder to circumvent. Be transparent about why you're blocking — research shows that children are more likely to respect restrictions they understand.

If you're blocking sites on a device you don't own (like a work phone), check your company's policies first. Many employers have their own mobile device management software that blocks sites remotely, and adding your own blocks may violate the agreement.

What to do if someone bypasses the block

If a child finds a way around the block — by using a VPN, resetting the phone, or changing DNS settings — the block itself is not the real problem. The underlying issue is that they want to access the content badly enough to work around your restrictions. This is a conversation to have, not just a technical problem to solve.

VPNs (virtual private networks) are the most common bypass: they route traffic through another server, so the phone's DNS or router-level blocks do not see the real destination. Some parental control apps detect VPN use and alert you. If you want to prevent VPN installation, use your phone's parental controls to restrict app downloads, though a determined person can still find workarounds.

The most effective long-term approach is a combination of technical limits and open communication about why certain sites are off-limits.

Frequently Asked Questions

Can I block a site on just one app, like Safari, but not others?

On iPhone, Screen Time blocks Safari entirely if you toggle it off, but does not let you block specific sites within Safari while allowing other browsers. You would need a third-party app like Bark to block sites across all browsers. On Android, you can block the Chrome app itself through Family Link, but not specific sites within it.

Will blocking a site stop it from loading on cellular data?

Router-level blocks and DNS changes only work on WiFi. Third-party apps like Bark work on cellular data because they filter traffic on the phone itself. If you need to block sites on cellular, use a parental control app or your phone's built-in parental controls (Screen Time or Family Link).

What if I forget my Screen Time or parental control passcode?

On iPhone, you can reset Screen Time with your Apple ID password by going to Settings > General > Transfer or Reset > Reset > Reset Network Settings. On Android with Family Link, you can reset restrictions through your Google account. If you set a passcode and truly cannot remember it, contact Apple or Google support with proof of ownership.

Do I need to pay for a parental control app, or are the free options good enough?

Free options like Screen Time, Digital Wellbeing, and Google Family Link work for basic blocking and time limits. Paid apps like Bark add detailed activity reports, stronger blocking, and alerts when someone tries to access blocked content. If you just want to limit screen time, free tools are sufficient; if you want detailed monitoring, paid apps are worth the cost.

Can someone uninstall a parental control app I installed?

On iPhone with Screen Time, you can prevent app deletion by turning on Content & Privacy Restrictions and toggling off the ability to delete apps. On Android with Family Link, the child cannot uninstall Family Link without the parent's password. Third-party apps like Bark are harder to remove without the parent's login, but a determined person with physical access can sometimes find ways around it.