A. To avoid unexpected charges during the free trial, ensure you read the terms and conditions carefully before signing up. Check the billing section in your account settings to confirm the trial period and when the subscription will start. Set a reminder a few days before the trial ends to decide if you want to continue or cancel the subscription. You can cancel the trial by going to your account settings, selecting 'Subscription', and clicking on 'Cancel Trial'.

B. Monitor your bank statements closely during the trial period. If you notice any charges that you did not authorize, immediately log into your account and check your subscription status. If you find that you were charged, you can cancel the subscription and follow the refund process outlined in the app.