You found something with too many legs and one question: what is it? There are more ways to answer that in 2026 than ever, and the honest ranking is not “which app is best” but “how sure do you need to be”. Here is every good option we know of, including the ones that are not ours, with what each is for.
First, the photo
Every method below, human or machine, is only as good as the picture. Three things fix most bad results:
- One creature, filling the frame. Tap to focus on it, not on the leaf behind it.
- Daylight, no flash. Flash flattens colour and blows out shiny wing cases.
- Top view first, side view second. Spot patterns, wing venation and leg length are what identifiers actually look at.
Add the place, the date and a size estimate (a coin next to it works) if you are going to ask a person.
Quick answer, no account: identification apps
All the apps below are free to download on iPhone as of September 2026. Prices and features come from each app’s own App Store listing; we have not tested the others’ accuracy ourselves.
| App | What it covers | Account? | What you get free | Good to know |
|---|---|---|---|---|
| Peekabug (us) | Insects, spiders and other small creatures | No | 3 scans a day, in the app or right here in your browser: name, how sure the match is, and whether it is safe to be near | Says “Likely”, “Possible” or “Best guess” instead of pretending; 5 languages; the collecting game is the point |
| Seek by iNaturalist | Everything alive: plants, animals, fungi | No; “does not collect any user data by default” | Unlimited camera identification, badges and challenges | Recognition runs from iNaturalist’s observation data; built for families; not bug-specific |
| iNaturalist | Everything alive | Yes, to post | Instant suggestions, then a global community reviews your observation | The slowest and the most trustworthy: a community-confirmed ID is real data for science |
| Picture Insect | Insects and spiders, “4,000+ species” per its listing | Not stated | Identification; the listing puts “identifying insects without limits” and “answers from entomologists” in the paid Premium plan (yearly, 7-day trial) | Also offers bite and pest-control references |
| BugKnow | Insects, spiders and other arthropods | Not stated | Identification, species profiles, a bite checker and a pest severity assessment (“for informational purposes only”) | English only; describes itself as built for “everyday Americans” |
| Google Lens / Apple Visual Look Up | Anything | No | Built into your phone; point it at a photo in your camera roll | No confidence level, no safety read, easily fooled by look-alikes |
Two things no app does well, ours included:
- Certainty on hard groups. Small brown moths, flies, ants and many beetles cannot be identified to species from a phone photo, by anyone. When Peeka says “Best guess”, she means it.
- Bites. A photo of skin cannot reliably say which animal caused it. Peekabug does not try. If a bite is swelling, spreading or you feel unwell, that is a doctor’s question, not an app’s.
Front desk note: on a “Likely match” the ID is usually right (24 of 25 in our test). On a “Possible match” it is a coin flip at species level, so read the look-alikes before you repeat it to anyone.
Sure answer: ask a person
When it matters, whether that is a spider in the baby’s room or a beetle you have never seen in your garden, a human who knows the group beats every app. The good news is that they are easy to reach and they enjoy it.
- r/whatsthisbug on Reddit. Hobbyists and working entomologists identify photos by hand, from anywhere in the world, usually within hours. Read the posting rules first: they want location and size, and they will tell you if the photo is not good enough.
- BugGuide.net. A volunteer-curated photo archive of insects, spiders and their relatives from the United States and Canada, with an ID request section. Slower than Reddit, but the identifications are reviewed and the archive itself is a superb reference once you have a family name.
- iNaturalist. Post the photo as an observation. The community confirms or corrects it, and once two people agree it becomes “research grade”. This is where Peekabug’s seasonal data comes from.
- University extension services (United States). Most state universities run an extension office that identifies photos or physical samples for residents, often free. Search for “insect identification” plus your state’s extension service.
- Local natural history museums and entomological societies. Many run identification days and answer emails. Worth it for anything unusual.
Look it up yourself: databases
If you have a family or genus name and want to check it, these are the references we use ourselves:
- BugGuide.net for North America, organised by taxonomy with photos at every level.
- iNaturalist’s taxon pages for range maps and seasonality anywhere in the world.
- Wikipedia and Wikispecies for the scientific name, synonyms and a first description.
- The Peekabug Field Guide for the 181 species in our app: where to look, when they are active (from iNaturalist’s research-grade records), their life cycle, and a hand-checked safety level for 42 of them.
The order we would actually use
- Scan it with an app for a name in ten seconds. If the app says it is sure and the safety read is green, you are usually done.
- If the app hedges, or the creature might bite or sting, post the photo to r/whatsthisbug or iNaturalist with the place and size.
- Once you have a name, read about it in a database, then go back outside and look again. That is the part the apps cannot do for you.
Questions
What is the best free app to identify a bug from a photo?
For a quick name with no account, Seek by iNaturalist and Peekabug are both free to download and neither needs a sign-up. Seek covers all living things and says it collects no user data by default; Peekabug is bug-only, tells you how sure the match is and whether the creature is safe to be near, and gives three scans a day free. For a verified answer, post the photo to iNaturalist or r/whatsthisbug and let people confirm it.
Can Google Lens identify insects?
Often, yes. Google Lens and Apple's Visual Look Up are built into most phones and will name common insects from a photo. They give no confidence level and no safety read, and they are easily fooled by look-alikes, so treat the result as a starting point.
How accurate are bug identifier apps?
It depends on the photo and the species. In Peekabug's own September 2026 test on 50 research-grade iNaturalist photos, the identifier named the exact species 72% of the time and the right genus 82%. Other apps publish their own claims; none of them replaces a person who knows the group when the ID matters.
Where can I ask a real entomologist to identify a bug?
r/whatsthisbug on Reddit, BugGuide.net (United States and Canada), an iNaturalist observation, or, in the US, your state university's extension service. Include a sharp photo, the location, the date and the size.
Can an app tell me what bit me?
Some apps offer a bite reference. Peekabug does not identify bites or rashes: a photo of skin cannot reliably say which animal caused it. If a bite is swelling, spreading or you feel unwell, see a doctor.
