PictureThis is a full-featured plant identification and care system that uses AI. It can identify plants by uploading a photo, offer detailed care advice, and offer advice on watering, lighting and fertilizing. It also can diagnose plant diseases and suggest treatments and warn you about toxic plants you might not want your family or pets to ingest. With a database of more than 20,000 plant species, it's good for gardeners and plant enthusiasts.
Another contender is Pl@ntNet, a citizen science project that uses AI image recognition technology to let people identify plants. The app also lets you contribute to the project by reporting observations that can help refine AI results. It's got offline identification and GeoPl@ntNet for finding species in a particular area, too, so it's good for people interested in biodiversity and conservation.
If you want something more built in, Google Lens in Google apps can identify plants with your phone's camera. It can identify plants, but also objects and text, so it's good for plant identification and other questions, too.
Last is PlantIn, which offers a full plant care and disease diagnosis system with a database of more than 17,000 plant species. It offers customized care plans, expert advice and tools like a light meter and watering calculator to help you grow plants. Its interface is designed to be intuitive and is available on iOS, Android and the web, so it's good for plant enthusiasts of all skill levels.