Mobile apps can help researchers collect data from the field in new ways. Some examples discussed are the iRecord Butterflies app, which has collected over 31,000 surveys, and PlantTracker, which has received over 10,000 invasive plant records. These apps allow geo-located data, photos, and metadata to be captured on phones and shared publicly, engaging citizens in research. They provide accessible ways for the public to contribute data that researchers can use to monitor species populations and tackle other issues. Apps work well for both researchers, who gain new data, and the public, who learn about research and see the impact of their contributions.