Grok - AI Chat & Video v1.3.66 forces privacy policy agreement, blocks account deletion, April 2026

The official App Store release notes for v1.3.66 described the update with a generic statement: "Improvements to Chat, Voice and Imagine." This release follows a March 2026 update that paywalled core features, but the April 21 build introduced a distinct controversy focused on data retentionGlossaryRetention (D1 / D7 / D30)The percentage of users from a cohort who return to the app N days after install. D1 = day-1 retention, D7 = 7-day, D30 = 30-day. The single most important non-reven... and privacy controls, not monetization.

The update arrived as parent company xAI faced significant regulatory pressure over AI-generated content and its data handling practices, setting the stage for heightened user sensitivity to any changes in terms of service.

The core of the user backlash centers on the belief that the app now forces agreement to a new privacy policy to permit account deletion.^[2] One 1-star reviewer on v1.3.66 stated, "If you don’t agree with the new privacy policies you will not be allowed to delete your account. They force you to agree to delete if you don’t agree." This sentiment captures the primary frustration seen in post-update reviews, shifting the conversation from feature complaints to data rights concerns. Other users continued to lament previously paywalled features, with one review noting, "Elon took all the fun away from free."

Independent analysis refutes the claim that account deletion is blocked. A report from PCMag outlines the standard procedure to opt out of AI training and delete conversation history, confirming that deletion is not conditional on a policy agreement. However, the underlying user fear is rooted in a technical reality. A privacy analysis by Anonyome Labs clarifies that while users can delete their accounts, "deleting your X account does not delete the data from the AI model." This means any data already used for training cannot be retroactively removed, a critical distinction lost on many users.^[4]

The update's fallout coincides with a measurable drop in user engagement. According to data from Forbes, Grok's average daily active usersGlossaryDaily Active Users (DAU)The count of unique users who were active in the app on a single cale^[3]ndar day. The most-watched daily engagement signal in mobile apps. on mobile apps fell 12.5% worldwide between March and April 2026, from 13.9 million to 12.2 million. This happened as rivals like Claude and Gemini gained ground.

With over 3.35 million US iOS downloads in the last 30 days, the negative sentiment shift affects a substantial user base and poses a threat to Grok's market position.

The v1.3.66 update appears to be a misstep in user communication rather than a malicious policy change. The user perception of being trapped is a reaction to standard compliance language combined with the unsettling nature of permanent AI data training. While the claim of blocked account deletion is factually incorrect, the damage to user trust is real and measurable.

Moving forward, xAI faces the difficult task of rebuilding confidence. The company must improve transparency around its data retention policies or risk continued user attritionGlossaryChurnThe rate at which users stop using an app (general churn) or cancel a subscription (subscription churn) over a time window — retention's mathematical complement. and further regulatory scrutiny, especially in Europe.