PictureThis or PlantNet: which plant identifier should you use?

This is the real difference and it is a design philosophy rather than a capability gap.

PictureThis returns one species with a confident presentation and a care card. It is a better product experience: you point, you get a name, you move on. Most of the time the name is right, and the app is very good at not looking uncertain when it is.

PlantNet asks you a question first — which organ did you photograph: leaf, flower, fruit, bark, whole plant? — and then returns a ranked list with similarity percentages. That organ prompt is not friction for its own sake; it is how botanical keys narrow a candidate set, and it substantially improves the result.

Which you want depends on whether being wrong has a cost. For a houseplant, one confident name is fine. For a plant near livestock, a plant a child has put in their mouth, or a plant you are about to eat, a ranked shortlist with stated confidence is the more useful object, because it tells you when to stop trusting it.

The single most useful thing to know about this pair: they are trained on different worlds.

PlantNet's reference data is a scientific flora — species as they occur in the wild, contributed and verified through a research network. That makes it excellent on the things a botanist cares about and poor on the things a garden centre sells, because named cultivars are a commercial artefact rather than a taxonomic one.

PictureThis has the opposite bias. Its reference set is enormous and heavily weighted towards ornamentals, houseplants and horticultural varieties, which is what most of its users are photographing. Ask it which of forty hosta cultivars is in the pot and it has a real chance; ask PlantNet and it will correctly tell you it is a Hosta and stop.

So the choice is decided by provenance rather than by preference. Did the plant come from a shop, or was it already there? That question routes you correctly almost every time.

Both apps are free to download, which is not the question anyone is asking. On 2026-09-03 the App Store listings said this: PlantNet lists no in-app purchases whatsoever, and PictureThis lists 4 tiers between $3.99 and $49.99.

PlantNet has no paid tier to run out of because it is not a business. It comes out of public agricultural and development research, its purpose is a shared scientific database, and identifications you contribute feed it. That is why there is nothing to buy.

PictureThis is a commercial product and the subscription is the product. In exchange you get a much larger cultivar reference set, care and watering guidance, disease diagnosis, and a great deal more polish. Whether that is worth it depends entirely on whether you keep plants or find them.

One warning that applies to the paid side. Apple lists in-app purchase names and prices but not the billing period, so a low-priced tier is frequently weekly rather than one-off. Check the sheet before tapping: a weekly subscription is several hundred a year, usually multiples of the annual tier of the same product.

Both reward the same discipline, and PlantNet rewards one extra step.

• Fill the frame with one thing. One flower, one leaf, one cluster — not the whole border.
• Even light, no flash. Flash blows out the surface texture the model reads.
• Shoot the most informative organ. Flower if there is one, then leaf, then fruit, then bark.
• For PlantNet, tell it which organ you shot. This is the step people skip and it is the one that most improves the result.
• Take the underside too. Colour, hairs and vein pattern separate several pairs that look identical from above.

And one character neither app asks for: how the leaves attach to the twig. Opposite or alternate is the first branch of every real botanical key and it eliminates most of the candidate list instantly, which is why our free leaf key asks for it before anything else.

They cost nothing together, because one of them costs nothing at all, and their weaknesses do not overlap.

PlantNet in the field for wild plants, where its ranked shortlist and its research database are strongest and where being told the confidence matters. PictureThis at home for the pot on the windowsill, where the cultivar name and the watering schedule are the actual question.

If you would rather add one free app than one paid one, the pairing to consider instead is PlantNet plus Seek: both free with no in-app purchases, together covering wild plants properly and everything else alive adequately, with Seek working on the device when there is no signal.