What is the difference between Forever Free and a paying version (Single User, Multi User, Unlimited)?

Forever Free is almost the same as the payed subscriptions. But there are a few differences. ZooEasy Online contains an import feature. This feature is not available in Forever Free. If you upgrade to a paying account of ZooEasy Online, this feature will automatically be available (after payment). You will have to login and logout again to get all features.

Forever Free is limited to 25 animals. (You can add an unlimited amount of animals to a paying subscription).