Here’s a step-by-step tutorial on how to block a specific device from using WiFi using the Scheduler function in the UniFi Network app.

This guide applies to the UniFi Network app by Ubiquiti Inc. (mobile version).

📶 How to Block a Device Using Scheduler in UniFi App

Step 1: Open the UniFi Network App

1. Open the UniFi Network app on your phone.

2. Log in to your UniFi account.

3. Make sure you are connected to your UniFi console (Cloud Key / UDM / Dream Router).
   
   

Step 2: Go to Setting on the unifi app

1. Tap Bottom Right gear icon
   
   

Step 3: Click on Policy Engine

1. Tap on policy engine

Step 4: Click on Traffic & Firewall Rules

1. Click on Traffic & Firewall Rules

Step 5: Key in details 

1. Key in the Name
2. Choose Block
3. Choose devices via source
4. Destination choose Internet
5. Schedule is based on personal preference 
   
   

⚠️ Make sure you select the correct device before proceeding.

🔒 Instant Block (Simpler Method)

If you just want to stop access immediately:

1. Select Clients

2. Select the device

3. Tap Block

4. Confirm

The device will lose WiFi instantly.