WikEM is a free medical reference app available for iPhone users that provides physicians with an online wiki and database of emergency medicine knowledge. The app offers a continuously updated content from its website, WikEM.org, which allows for quick reference of key information. It is designed to assist clinicians in their daily practice, and not directly for patients.

The app offers a user-friendly interface that is easy to navigate, and the content is available offline, making it accessible at any time. Additionally, in-app purchases are available that unlock personalized lists and favorites for a year. Payment will be charged to the user's iTunes account at the time of purchase, and subscriptions automatically renew unless turned off 24 hours before the end of the current period. Subscriptions can be managed by the user in their account settings.

Overall, WikEM is a valuable tool for physicians in the emergency medicine field, providing them with a comprehensive and up-to-date reference guide at their fingertips.