Fieldkey: Plant Rock Coin ID

Snap it. Know it. Fieldkey identifies plants, rocks, minerals and US coins right on your phone, with no account, no upload and no internet needed. THREE MODES IN ONE APP • Plants: about 2,100 wild and garden species, plus 100 popular houseplants and garden plants, with light, water and pet-safety notes. • Rocks: about 130 rocks, minerals, crystals and gemstones, with hardness, streak, crystal system and simple tests you can do at home. • Coins: 22 US coin types. Fieldkey also reads the year and mint mark from your photo and flags silver content and well-known key dates. HONEST BY DESIGN Every result shows how confident the model is and the next-best matches. When it is not sure, it says so and asks for another angle. Coin values are only ever given as an estimated range (check a dealer). Plant safety notes are general information, not medical or veterinary advice. Never eat a plant or mushroom because an app said so. PRIVATE AND OFFLINE All identification runs on your phone. Your photos never leave the device. No account, no analytics, works without a connection. YOUR COLLECTION Save finds with the photo, date and your notes. Share a find card with friends. FREE AND PRO Free: 3 identifications a day, plus one more by watching a short video. Pro: unlimited identifications, no ads and collection export, as a monthly or yearly subscription (with a free trial) or a one-time lifetime purchase. Fieldkey is built on open models and open data: the Google AIY plant classifier, photos from iNaturalist and Wikimedia Commons contributors, and descriptions from Wikipedia and Wikidata. The full credits are in the app.

The Pro screen now shows the yearly plan's price after the free trial. Rock identification uses the newer, more accurate rocks model.