What is that?
A phone camera, a microphone and a trained model can now name a flower, a birdsong or a half-heard chorus in a few seconds, and most of the time they are right. How often depends on two things: how good the photo or recording is, and how common the thing is. A garden rose is easy. A seedling, a distant warbler or a live cover version is not.
How far to trust each kind of answer
| What you point it at | How reliable | The catch |
|---|---|---|
| A recorded song playing nearby | Very | Live versions and remixes often fail |
| Common garden plants and houseplants | Good with a clear photo | Seedlings and bare stems are hard |
| Birds by their song | Good for common species | Wind, traffic and mimics confuse it |
| Birds by photo | Good with a sharp shot | Distant silhouettes |
| Stars and planets | Exact, because it is calculated rather than guessed | An uncalibrated compass |
| Mushrooms and wild food | Not safe to rely on at all | Toxic look-alikes |
Advertisement
Plants, birds and insects
PictureThis. Excellent recognition and care advice for plants. The free tier is limited and the push towards the subscription is persistent.
PlantNet. Free, with no advertising, run by research institutes as a citizen science project. It asks whether you photographed a leaf, flower, fruit or bark, which improves the answer.
iNaturalist. Suggests a species, then real people confirm or correct it, and your observation can end up in scientific datasets.
Seek. From the same project, identifies through the live camera with no account needed. Good for walks with children.
Merlin Bird ID. Free from the Cornell Lab, identifies birds by sound or photo, and works offline once you download the pack for your region.
BirdNET. A research project that identifies birds from recordings. A useful second opinion on a song Merlin is unsure about.
Picture Insect. For the beetle in the kitchen or the caterpillar on the roses. Expect a subscription prompt much like the plant app above.
Planta. Not really an identifier. It is the app for keeping the identified plant alive, with care reminders based on the plant and the room it lives in.
Songs, stars and the plane overhead
Shazam. Names a recorded song in seconds, and its pop-up option can identify music playing inside other apps as well.
SoundHound. The one to try when you only remember the tune, since it can work from humming or singing.
Google. The search app's hum to search feature does the same job, and it is probably already on your phone.
Sky Map. Hold the phone up and it labels stars, planets and constellations. Originally from Google, now open source, free and light.
Stellarium. A proper planetarium in your pocket, with more detail than the simple sky maps.
Star Walk 2. The most polished sky viewer, with good visuals for showing someone else what they are looking at.
ISS Detector. Tells you when the space station will pass over, which is the easiest bright moving thing to show a child.
Flightradar24. Which plane is that, where it came from and where it is going, with a camera view that labels aircraft overhead.
Things in shops and on the table
Google Lens. Landmarks, products, text, plants and animals in one camera. The first thing to try when you do not know which specialist app you need.
Vivino. Photograph a wine label to see what it is and what other drinkers thought of it.
Yuka. Scans food and cosmetics barcodes and explains what is in them, with its own rating.
Open Food Facts. The open, volunteer built product database behind many scanners, and you can add missing products yourself.
Getting a better answer
- Photograph the flower and the leaf separately Plant apps do far better with close, sharp shots of each part than with one photo of the whole bush.
- Fill the frame and tap to focus A small blurred subject in the middle of the picture is the usual reason for a wrong answer.
- For birds, point the phone and stay still Wind noise and your own footsteps ruin recordings. Stand still for twenty seconds.
- For songs, move closer to the speaker Background chatter matters more than volume.
- For the sky, calibrate the compass Move the phone in a figure of eight away from metal and speakers, or the labels drift.
- Confirm anything important with a second source A second app, a field guide or a community of people who know the subject.
Use Lens when you do not know where to start, a specialist app when you do, and never let an app decide what goes in your mouth.
Frequently asked questions
Are plant identification apps accurate?
For common species and a good photo, usually. For rare species and close relatives, less so. Look at the confidence the app shows and check a second source.
Do these apps work offline?
Some do. Merlin works with downloaded regional packs, and sky maps calculate positions on the phone. Most plant apps send the photo to a server, so they need a connection.
Will my photos reveal where I live?
Observations shared on iNaturalist are public, with location. You can obscure the location in its settings, which is sensible for anything photographed at home.
Can an app tell me if a plant is poisonous to my pet?
Some show toxicity information, which is a starting point only. If a pet has eaten something, call a vet straight away rather than looking it up.
Read next
Nothing has infected your phone. Something you installed has permission, and the fix is a list in settings.
A phone will happily run a keyboard, a mouse and a memory stick. It will not power a desktop hard drive.
Hard and fast are different things. Almost every game confuses them, and these do not.
