If I cancel my LitCharts A+ subscription, will I lose access immediately?

No. If you cancel your LitCharts A+ subscription, you will continue to have access to LitCharts A+ content and features through the end of your current billing cycle. 

For example, if you subscribed to a monthly subscription on June 1, 2020 at 10am Eastern Time, and then cancelled your account on June 15, 2020, you would still have access until July 1, 2020 at 10am Eastern Time.