On the web app, you have the ability to do bulk actions. Just select the checkbox of the cattle you want to treat, then select "Add Treatment" and a popup will come up to fill out the information. You can also add a pregnancy record, sell cattle, and delete cattle.
You can cancel your subscription anytime in your account. Once the subscription is cancelled, you will not be charged next month. You will continue to have access to your account until your current subscription expires.