CrossPrism Nature Guide is a reference app for anyone who wants to know what they are looking at. Point the camera at a bird, a flower, a mushroom or an insect, and the app returns a species suggestion drawn from large built-in model families: roughly 7,300 bird species, about 30,000 flowers, 11,000 leaf types, 29,000 insects, 7,500 fungi, 7,000 underwater species, plus mammals, reptiles and amphibians. Identifications link out to Wikipedia and can be saved so you can build a personal nature journal over time.
The defining design choice is offline operation. Where most identification apps depend on a cloud service and mobile data, CrossPrism runs its recognition on the device and is explicitly optimized for pristine, undeveloped areas where there is no connectivity. That makes it practical on long hikes, in national parks and on research trips, and it also means your photos are not required to leave the phone for an identification to happen.
Development has been steady: the developers have retrained and expanded the birds, flowers and insects models repeatedly, added support for reptiles and amphibians, added auto-capture above a confidence threshold, sharing and action-extension support, and photo-library saving. The app is free, sits in the Reference category, requires iOS 16.4 or later, and collects only non-identifying analytics and diagnostic data according to its App Store privacy disclosure.
