Orvik or Picture Insect: one domain or eight

It is worth being blunt about what any insect identifier can deliver, because expectations set here decide whether you are disappointed.

• Family is frequently as far as anyone gets. "A rove beetle" covers tens of thousands of species and is a real answer. An app returning a confident species for a small brown beetle is usually guessing.
• Life stages share no features. A caterpillar and its moth are one species and look nothing alike; so are a larva and its beetle, a nymph and its bug.
• Mimicry is deliberate. Hoverflies evolved to convince predators that they are wasps, and an image model is a predator-shaped problem.

This is why our free caterpillar key filters on host plant rather than colour: knowing it was on milkweed narrows the list to about three species, which no amount of image quality achieves.

The most diagnostic fact about a great many insects is what it was sitting on, and it is the one thing a photograph of the insect alone throws away.

Most caterpillars feed on one plant family and many on a single genus. Green caterpillar on a tomato plant is one of two species; green caterpillar in the abstract is one of forty. A striped beetle on a squash flower and the same-looking beetle on a potato are different species with different treatments.

This is a real argument for breadth rather than a rhetorical one: an app that also identifies the plant lets you use the strongest character available. It is also why the free browser keys here ask for host before they ask for colour.

On 2026-09-03, Picture Insect listed 6 in-app purchase tiers between $2.99 and $39.99; Orvik listed 2 between $4.99 and $29.99.

Since this is our page, the honest addition: Seek and iNaturalist both listed no in-app purchases at all on the same date, published by the same non-profit. Seek identifies insects instantly on the device with no account and no upload. iNaturalist gets your photograph looked at by entomologists, and for a hard insect that is not merely better than a paid app — it is a different activity.

Pay for either app on this page only if a specific feature is worth it to you, not because the free options are assumed to be worse. On insects they are frequently better.

Most failed insect identifications are failed photographs, and this matters more than which app you use.

1. Straight down on the back, whole outline in frame and sharp. The standard reference view.
2. From the side. Body profile and leg attachment separate families that look identical from above.
3. The antennae. Clubbed, elbowed, feathery or thread-like is what an entomologist checks first, and it is the detail most often cropped out.
4. The plant it was on, plus something for scale.

Add location and date when you post anywhere. Regional identifiers filter by place first, and an observation without a location goes to the wrong queue.

Most insect misidentifications cost nothing. Three groups deserve more care than any app provides.

Spiders. Only widows and the brown recluse are medically significant in North America, and recluses live in a narrow, well-mapped range. Studies of "recluse bites" reported outside that range have repeatedly found most were bacterial infections, commonly MRSA — and treating an abscess as a spider bite delays the antibiotic that fixes it. Our free spider key leads with range for that reason.

Stinging caterpillars. Puss, saddleback, io and buck moth sting through hollow spines, and the puss caterpillar looks like a scrap of soft fur. The rule that protects you is behavioural: do not pick up a caterpillar with spines, tufts or dense fur, whatever any app says it is.

Ticks, where species and attachment time change the medical advice, and a photograph is genuinely useful to a doctor.

Prices, 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, ours included.

Both apps are built for insects outdoors, and a large share of the questions people actually have are about insects in the house — where the useful answer is rarely a species name.

The indoor question is almost always where rather than what. Tiny mottled beetles on a windowsill in spring are carpet beetles, and the damage is being done elsewhere by larvae in wool and under furniture. Small dark beetles running through flour are stored-product pests, and the fix is binning the packet and vacuuming the shelf corners. A beetle that keeps appearing in a wall void usually means something died in there.

Recognising the family is enough to act in every one of those cases. The species name adds nothing.

The genuine indoor failure runs the other way: the large fast black beetle crossing the floor at night is a ground beetle, it eats pests, and it should be put back outside rather than sprayed. Our free beetle key sorts by where you found it for exactly this reason.