Forty to fifty pearls
Researched in archives and sources, and checked on the spot: a spotting question only works when you are standing in front of it.
For cities and partners
Delft is the first. We make Pearls of for cities whose stories people walk straight past, together with the people who know those stories: city marketing, heritage organisations, museums and hotels.
Every city gets its own tiles. The empty ones are for yours.
What a city gets
The app sends visitors to places away from the crowds, because there is something to see there: an almshouse courtyard, a stone with a mistake in it, an old painting back on the spot it shows. That is the spread and the longer stay most cities are looking for.
Researched in archives and sources, and checked on the spot: a spotting question only works when you are standing in front of it.
Four routes with walking times and a starting point at the station or the market square, plus Walk to your hotel via pearls for people who have just arrived.
Paintings, prints and photographs measured in at the spot where their maker stood, with viewing direction and angle of view, so that through the camera they fall onto the facades.
A historical map, bent into place at dozens of points along today's canals and streets, with a looking glass to look through it.
A game leader in control, quiz questions, flash challenges and a winners' podium: for schools, companies and the tourist office.
No app store, no account, works offline. Locations stay on the visitor's phone; no advertising and no tracking.
How we work
A walk with your guides, archivists and local businesses: what makes this city, and what does everyone walk past?
Sources, stories, spotting questions and routes. Every text cites its sources; you read along.
Every spotting question checked on site, the old images measured in, the historical map bent into place and your own tiles drawn.
With residents, a school class and a group from the tourist office. Whatever jars is taken out.
A leaflet, QR cards for hotels, a press event and a first tour with the press or the city council.
Working together
On request
You pay for the development and an annual licence for hosting, maintenance and new pearls. Visitors play for free or at a price you set.
On request
We make and sell the app; you open up the sources, the tourist office and your channels. A fixed share of every pass sold goes to the city.
Prices excluding VAT. Museums and heritage organisations: ask about a tour or a layer just for your collection.
Hotels and hosts
Your guests step off the train at the station. With Walk to your hotel via pearls, they pass the finest spots in the city on their way to your reception desk, with a detour of ten, twenty or forty minutes. They arrive with a story instead of a wheelie case full of hurry.

Getting acquainted
The best explanation is an hour in Delft with the app. Tell us who you are and what makes your city special; we'll arrange a walk or a video call.
We've received your request. You'll get a proposal by email within one working day.