Note
This is a cached result from 19 Sept 2026. A new scan will be available on 17 Oct 2026.

duolingo.com

96.0s 19 Sept 2026
Verdict

2 warnings · 7 checks passed

Advertising assessment: Non-Compliant Grade B
85% Technical score

Vendors

5
Google Tag Manager functional
GTM-TX6Z97C
Compliant

Violations

3
Critical
Consent Mode does not update in place after the consent choice GCM_008

Affected: broken

Call gtag('consent', 'update') immediately after the visitor's choice, with the correct values for both accept and reject. Do not rely on a page reload: it creates duplicate pageviews and breaks session attribution.

Warning
Consent Mode default is missing GCM_001

Call gtag('consent', 'default') with denied values before GTM or GA4 loads, so the initial consent state is explicit.

Warning
Consent state was not updated after the banner choice GCM_003

Make both the accept and the reject button update the consent state through the GTM Consent API or gtag('consent', 'update').

Overview

Consent Banner Exists 15/15
Consent Banner Functional 10/10
Reject Option Available 10/10
No Tracking Before Consent 20/20
Consent Mode Implemented 7.5/15
Consent Mode Correct States 2/10
No Tracking Cookies Before Consent 10/10
Consent Persists Correctly 5/5
No Tracking After Reject 5/5

Consent Mode