Canopeo is a mobile/web application that uses a smartphone's camera to measure crop canopy cover accurately. It works by taking a photo of the crop canopy from directly above, then classifying the original and processed images. Users can then submit details, view past images and data on maps, and build project folders over time to monitor canopy growth throughout the season. While it provides an effective monitoring method, the app is still in development and has some issues like poor web functionality and data submission glitches.