The Animal Lovers PDX web app (https://animalspdx.web.app) runs like an app on mobile devices, and like a website on laptop or desktop computers. You do not need to download anything, and you can still make a link to the web app on your home screen. Animal Lovers PDX is free and has no advertisements.
The information is arranged so as to be helpful to people who are trying to help animals. There is quick-access information for emergency veterinary care, including a map with emergency and 24-hour veterinary practices tagged. There is also an index of information for low and no-cost veterinary care. Animal rescue and adoption organizations are indexed, as well as farm animal sanctuaries in the area.