An AI tour guide for whatever you stop in front of, not just the stops on a route.
Lensmark is an AI tour guide you point at things instead of following. Photograph the cathedral in front of you, or the plaque nobody ever transcribed, or a shot that has sat in your camera roll for a year, and it tells you how old it is, who made it and why it matters, with a link under every date and name.
Free at launch. Nothing to book, and nothing to download.
Take the picture, read what comes back, then ask whatever else you want to know.
Everything starts with one photo
Point the camera at the building or the painting in front of you and take the picture. Lensmark checks what it is against more than one source, then writes out its history with a link under every date and name so you can read the source yourself.
A photo you took last week works exactly the same way. Pick one out of your camera roll and the answer comes back the same, which is how a holiday folder full of buildings you never got round to asking about finally gets answered.
More than one source landed on the same name, so you get the story and the links behind it.
You do not have to book a guide or buy a city pass to find out what you are looking at.
A walking tour starts at a set time and follows a route somebody else chose. It covers what is on the route, at the pace of the group, and it ends whether or not the thing that actually caught your eye was ever mentioned. Buying a city audio pack has the same problem in a different shape: you get the stops the publisher already wrote, in the cities they already cover.
Lensmark has nothing to book and no route to follow. You photograph the thing in front of you, read what comes back, and move when you are ready. If you want to stand there for ten minutes and ask three more questions, nothing is waiting on you.
It opens in a browser, so there is nothing to install before you go.
A download is the thing you have not done when you are already standing in front of the building. Lensmark opens at lensmark.ai in whatever browser your phone came with, so it is there the first time you want it, in the museum queue or halfway down a street you wandered into by accident.
There is no city pack to choose in advance either. It works the same in a capital you planned for months and in a town you only heard of yesterday.
Every date and name comes with a link you can open.
An answer comes back in four parts.
The story
What happened here, and what the place was for.
Who made it
The people behind it, when they built it and what they were trying to do.
The sources
A link under the answer to the pages the facts came from, so you can read them yourself.
What is still open
Where the sources go quiet or disagree, you are told, and the gap is not filled in with a guess.
The stage-by-stage version, worked through on a real building, is on how a landmark is identified from a photo.
Ask a follow-up or photograph the next thing, and it all stays in one conversation.
Ask what a date meant, or who the Medici actually were, and the answer comes back out of the research Lensmark already did on that subject, with the same links under it.
When you are ready to move, photograph the next thing. It joins the conversation you are already in, so you are not starting over in a fresh window that has never heard of the building you were standing in front of a minute ago. One conversation for everything you see, in the order you saw it.
The plaque nobody ever transcribed gets the same answer as the famous cathedral.
The famous ones are already answered everywhere. What is usually missing is the plaque worn down to half its letters and the building no guidebook has ever covered.
A weathered plaque
If there is writing on it, the words in your picture help work out what you are looking at.
A work with no wall label
More than one source has to land on the same name before Lensmark tells you what it is.
A building on your own street
The one you have walked past for years and never once looked up. It gets an answer too.
Something nothing agrees on
Lensmark tells you what it could see and leaves the name open.
In a museum, the label in your picture helps name the work.
Photograph a painting, a sculpture or an object in a case. If a wall label or a signature falls inside the shot, the words on it help name the piece, and knowing you are in the Rijksmuseum helps find the right one.
A painting is a harder problem than a building, because a building can be found by its address and a painting can be moved. The painting identification guide takes that apart step by step.
When Lensmark is sure it says so, and when it is not, it shows you what it saw.
Lensmark names something when more than one source lands on the same name. Under that line it asks you to confirm a likely match before it goes off researching the wrong building, or it tells you what it could see and stops there.
When the sources disagree about a date, you see that they disagree, along with the one worth trusting and why. A wrong date reads exactly like a right one, which is what makes it expensive: you have no reason to doubt it and nothing to check it against.
Travelers ask these seven questions before they open it.
Do I have to book anything, or start at a set time?
No. There is nothing to book and no departure time to make. You open Lensmark when you are standing in front of something, and you close it when you have read enough.
Can I use a photo I already took?
Yes. A shot from your camera roll works the same as one taken on the spot, so a holiday folder you never got round to asking about is a good place to start. If a photo already carries where it was taken, that narrows the search down. Without it, Lensmark works from the picture itself.
What does it cost?
Lensmark is free at launch. There is no city pack to buy and no tour to pay for.
Does it work on something that is not famous?
Unfamous is the case this was built for. A plaque on a side street is checked the same way a cathedral is. How much history comes back afterwards depends on how much has ever been written about it, which is honestly less for the side street, and Lensmark says so when the record runs thin.
Can I ask about more than one thing on the same walk?
Yes, and they stay together. Each new photo joins the same conversation, so the answers sit in the order you saw them and you can scroll back to the church you passed an hour ago without hunting through a second app for it.
Do I need to download an app?
No. Lensmark opens at lensmark.ai in the browser your phone already has, on an iPhone or an Android, so there is nothing to install before a trip.
Does it work in my language?
Lensmark answers in English right now.
Lensmark tells the history and leaves the trip planning to other apps.
Lensmark explains the sourced history of one landmark or artwork you choose. Routes, tickets and directions belong to a travel-planning app, and trying to be both would make this a worse history teller.
Open Lensmark and photograph the next thing you walk past.
Whatever you have stopped in front of, take the picture and find out what happened there.