Quizlet

Is Quizlet safe?

For content and strangers, yes. Quizlet is a flashcard and practice-test service with no private messaging, and children under 13 get a cut-down account that cannot make public sets. The trade-off is advertising. The free version carries third-party ads, the App Store label lists seven kinds of data used to track you across other companies' apps, and Quizlet's own policy says it "sells" or "shares" identifiers for ads in the sense of California law. We score it 62/100, about level with Duolingo (61), which runs on a similar ad-funded model, and behind Google Classroom (69), which has no ads at all.

How Quizlet uses student data for advertising

Apple's privacy label lists purchases, location, user content, search history, identifiers, usage data and "other data" as used to track you. Under third-party advertising it adds coarse location, search history, device ID and advertising data. Google Play shows the same picture from the other side: Quizlet says it shares name, email, user IDs, approximate location, app interactions and search history with other companies, several of them for "advertising or marketing".

The privacy policy, last updated on 3 February 2026, explains why. Quizlet lets third-party ad companies collect data through cookies and pixels in its website and apps, and builds "profiles and audience segments" for interest-based advertising on its own service and on other sites and apps. Its California notice says it has disclosed identifiers and internet activity both to target ads for Quizlet elsewhere and to earn money from ads inside Quizlet, which "may be defined as a 'share' or 'sale'". It adds that it has no actual knowledge of selling or sharing data of anyone under 16.

The way out is to pay or to opt out. Quizlet Plus removes third-party ads, and students in a class set up by a teacher with Quizlet Plus for teachers see no third-party ads on that class's sets. Anyone can use the "Your Privacy/Cookie Choices" link on the website or email [email protected] to opt out of sale and sharing.

Quizlet for children under 13

Quizlet says it is intended for users aged 13 and over, but it lets younger children in through a restricted Child Account. Sign-up asks for the child's date of birth and a parent's email address. Quizlet emails the parent, and in some countries the parent has to confirm consent before the child can create sets. The same restrictions apply to some users under 16 where local law requires it.

Child Accounts cannot upload profile pictures, images or audio, make public sets, create classes, share or embed sets, or change their username. The policy says Quizlet uses a restricted version of Google Analytics in the areas children use, though it may use aggregated or de-identified data about children for marketing. Parents can review, edit or delete the account by signing into it.

Content, ads and AI

Most of Quizlet is flashcard sets made by other users, so the content risk is low. Its help centre says filters look for bullying and hate speech and that users can report sets, classes and profiles. Medical and nursing sets can include graphic images, and Quizlet asks their creators to keep them private.

Ads are the more likely problem for a teenager. Quizlet lists banned ad categories, including adult content, dating, gambling, alcohol, tobacco, drugs and weapons, and admits that an ad from one of them "may occasionally slip past". Ask Quizlet, its AI study assistant, accepts uploaded notes, screenshots and documents of up to 25 MB on mobile. The February 2026 policy we read does not say whether those uploads are used to train AI models.

Security and account protection

Quizlet runs a public bug bounty on Bugcrowd, which pays researchers up to $2,000 for the most serious security flaws, and says its website and apps use HTTPS. No breach of Quizlet accounts appears on Have I Been Pwned. We found no two-step login option in its help centre, so a reused password is the main way an account gets taken over; signing in with Google or Apple lets you use that account's two-step protection instead.

How to use Quizlet more safely

1. Keep sets private unless you mean to publish them, especially notes with names, photos or anything personal.
2. Click "Your Privacy/Cookie Choices" at the bottom of quizlet.com to opt out of ad sharing, and deny the tracking request on an iPhone.
3. Use a unique password, or sign in with a Google or Apple account that has two-step verificationTwo-factor authenticationSigning in with a second proof of identity on top of your password, such as a code from an app, a security key or a passkey.More in the glossary.
4. For a child under 13, use your own email at sign-up so you receive Quizlet's notice and can confirm or refuse consent.
5. To leave, delete the account in Settings and cancel any App Store or Google Play subscription separately.

How we scored it

Regulatory record (87) and scams and harmful content (80) are Quizlet's strongest factors: no regulator action, no private messaging and tight limits for children. Privacy (38) is the weakest, driven by ad tracking on free accounts and the "sale or share" disclosure. Security (65) gains from the paid bug bounty and a clean breach record but loses points for having no two-step login of its own.