Whale Alert is a collaborative effort to save endangered whales. We use science, innovative technology, and collaborative community efforts to decrease whale strikes and entanglements. A key component of this effort is the use of downloadable apps like Whale Alert, by nature enthusiasts, fishers, and mariners. With this user-friendly application, it is possible for just about anyone to report whale sightings. The app is intended for use by researchers, commercial ship operators, charter fishing boat operators, whale watching naturalists, and recreational and commercial fishers, as well as the general public. Data collected through the app fills in a major information gap needed to effectively manage vessel traffic and fisheries in areas where whales are present.