Find the app for your area of interest on the SPOTTERON app overview. On the left, you can filter your search by topic, language, and location. Click on any app project's detailed view to find a detailed description, images of the app, links to the smartphone apps, and a link to the homepage or map.
Follow the link to your App Store and install the app on your Android or IOS smartphone. As an alternative to the app, you can also enter your observations on the interactive map of the project website.