You can turn off IQ Boost's auto-renewal in multiple ways, depending on how you enrolled.
To cancel your IQ Boost subscription, log in, go to your account or profile section, click "Manage Subscription" or "Unsubscribe," and follow the prompts. You may need to provide your email address.
To cancel your Google Play subscription, go to "Payments & Subscriptions" → "Subscriptions," choose IQBoost, and touch "Cancel subscription" at least 24 hours before renewal.
For Apple users, go to iOS Settings → [your name] → Subscriptions, pick IQBoost, and press "Cancel Subscription".
To disable auto-renewal if you paid with a bank card or a third-party platform, log in to the IQ Boost site and go to "My Account" → "Manage Subscription," or contact the platform's support.
To avoid charges, cancel at least a day before the next renewal date. Keep screenshots or confirmation emails for your records.
This is the information we have, but if you have more insights from your experience, please share in the comments.