What does "Less Secure App Blocked" mean on Google?

The short answer

It means Google stopped an app from signing in because it uses an old login method that can put your account at risk.

Why you see this message

Google labels some apps as “less secure” when they ask for your Google password directly instead of using safer Google sign-in.

Common triggers:

• Older email apps or devices
• Third-party tools with outdated Google connection settings
• Scripts or automations using old password-based login

How to fix it

1) Update or replace the app

• Install the latest version
• Check if it supports “Sign in with Google”
• If not, switch to a modern app

2) Reconnect your Google account safely

• Remove the old connection in the app
• Add the account again using Google’s official sign-in screen

3) Check your Google security settings

• Go to your Google Account security page
• Review recent blocked sign-in attempts
• Remove apps you no longer trust

4) For work or school accounts

• Your Google Workspace admin may block older login methods by policy
• Contact your admin if you need access for a specific tool

When should you worry?

You should take it seriously if:

• You didn’t try to connect any app
• You see repeated blocked attempts
• The app asking for access looks unfamiliar

In that case, change your password, review connected apps, and enable 2-Step Verification.