Yes. Open Membership → Manage in the web app, then use the billing portal to cancel renewal. For an App Store or Google Play subscription, cancel through the store where you bought it.
You keep paid access through the period already paid for. After that, your retained Free Account keeps your chart, connections, messages and purchased Sparks. Daily included Ask answers stop. You can still use Sparks for Ask, subject to daily limits.
The one-time option has no renewal to cancel. Its included month ends automatically.
Cancelling does not delete your account or request a refund. A refund can affect access differently; see the related refund guide. Account deletion has a separate processing period, so cancel renewal separately if you want to prevent another charge.
Purchase availability: New purchases are briefly paused. The pricing page shows the current catalog, not an available checkout. Existing balances and billing controls remain available; the app shows which actions you can use.