Your iTunes account will be automatically charged at the same price for renewal within a 24-hour period prior to the end of the current payment period unless you change your subscription preferences in your iTunes Account Settings.
When a subscription is cancelled, access to the features will expire at the end of the current payment period.
Please note, you will need a subscription in order to get access to get access to features like: Area Tool, Undo, Flashlight and Magnet.
The annual subscription will be automatically renewed unless auto-renew is turned off at least 24 hours before the end of the current payment period.
You will get access to all the features for the $24,99 annual subscription, including 3-day free trial.