Picture Mushroom alternatives — and why no app should decide what you eat

Every other identification app can be wrong and cost you nothing. A misidentified beetle is a footnote. A misidentified mushroom can require a liver transplant, and the mechanism is worth understanding because it explains why every mycological society gives the same advice.

The death cap, Amanita phalloides, and the destroying angels account for around 90% of fatal mushroom poisonings worldwide. Half a cap can kill an adult. Symptoms begin six to twenty-four hours later — long enough that people blame something else — then appear to resolve on the second day, at which point some patients are discharged, and the liver fails on the third to fifth. Amatoxins are stable to 260 °C, to drying and to freezing, so cooking does nothing.

Set against that: young death caps look like ordinary white field mushrooms and like puffballs, and the character that separates them — the membranous sac at the base of the stem — is usually buried and has to be dug for. A photograph of a mushroom standing in grass does not contain it. Neither does a photograph contain the spore print, which takes several hours on a sheet of paper and is the single most informative test in mycology.

This is not a limitation any app can engineer away. The information is not in the image.

Photo identification of fungi is genuinely useful for the things it is good at: learning what a genus looks like, putting a name to something in a lawn, recognising the common and distinctive species, and building the vocabulary you need before a book makes sense.

Where the whole field agrees is on edibility. The North American Mycological Association and its equivalents in Europe say the same thing in the same words: identify with a specimen in hand, using the whole organism, and confirm with someone who knows the local fungi before eating anything. It is not that the apps are bad — it is that the decision requires evidence the app never receives.

The four checks a mycologist actually runs, none of which survives a photograph:

• Dig the whole thing up, not cut it. The volva at the base is the most important character in the kingdom and it is below ground.
• Take a spore print. Cap on paper, covered, two to twelve hours. Colour settles several dangerous confusions on its own — a green print is Chlorophyllum molybdites, the most-eaten poisonous mushroom in North America, and nothing else.
• Slice every white ball vertically. An Amanita button looks exactly like a puffball and shows a cap and gills in section.
• Note what it is growing on — wood, soil, dung, and which tree. Substrate is a diagnostic character, and deadly galerina grows on rotting wood exactly where several edible species do.

Our free mushroom key is built around those four steps rather than around a camera, for that reason. It narrows possibilities and refuses to authorise eating anything, which is the only honest design for the subject.

These circulate constantly and all of them are false. They appear in poisoning case reports, which is why they are worth naming.

The last row is the reason this page exists in the form it does. An app returning a species name with an edibility field reads as an authority, and it is not one.

1. Join a local mycological society. In the United States the North American Mycological Association lists clubs by region; the British Mycological Society does the same in the UK. They run identification walks and monthly forays where named experts examine specimens people bring. This is by an enormous margin the fastest and safest way to learn, and it is usually free or nearly so.
2. Learn the foolproof few. Chicken of the woods, giant puffball, morels and chanterelles are where every teacher starts, because their dangerous look-alikes are recognisable and few. Learn those completely — including the look-alikes — before adding a fifth.
3. Use iNaturalist for the record. Free, and real mycologists confirm identifications. It is the closest thing to expert review available from a phone.
4. Keep an uncooked specimen for 48 hours of anything you eat, in the fridge. If anyone becomes ill, that specimen is what lets a hospital identify the toxin. This is standard practice among serious foragers and costs nothing.
5. Call poison control immediately if somebody has eaten something unknown — (800) 222-1222 in the US, 111 in the UK — and do not wait for symptoms. With amatoxins the treatable window closes before anyone looks ill.

Prices, in-app purchase tiers, ratings, versions and update dates are read from each app's US App Store listing on 2026-09-03 through Apple's Lookup API and product pages. No figure was typed from memory and the build fails if one appears in the prose.

This is the one comparison on the site where the recommendation is not to solve the problem with an app. That is not a marketing position — Orvik identifies fungi too, and this page says the same thing about ours.