Smartphones become positioning devices without carrying anything extra
For generations, the threshold between outdoors and indoors has marked the boundary of reliable navigation — GPS falls silent the moment one enters a terminal, a hospital, or a mall. A Chengdu-based company called Eforthink has now announced a system that carries centimeter-level positioning across that threshold, using ultra-wideband signals and the smartphones already in people's pockets. Unveiled in mid-June 2026, the technology asks nothing extra of the visitor while offering venue operators a new lens through which to understand how people move through shared space.
- Indoor spaces have long been navigation dead zones — GPS fails inside buildings, leaving millions of visitors in airports, hospitals, and malls to rely on static signage and guesswork.
- Eforthink's UWB anchor network now broadcasts positioning signals that smartphones calculate locally, achieving centimeter accuracy without requiring tags, special apps, or data sent to external servers.
- The system works across both iOS and Android flagships, a technically significant milestone given the fragmented landscape of UWB chip adoption among smartphone manufacturers.
- Venue operators gain a parallel benefit: anonymized foot traffic analytics that reveal bottlenecks, optimize layouts, and improve everything from store placement to emergency evacuation planning.
- Rather than selling a finished product, Eforthink is opening its engine to global partners — mapping platforms, ticketing systems, and system integrators — positioning UWB as the coming standard for indoor location services.
A Chinese technology company called Eforthink has built a system that turns any UWB-capable smartphone into a precise indoor positioning device, accurate to within centimeters. The announcement, made in mid-June from the company's base in Chengdu, marks a meaningful step toward making large indoor spaces as navigable as the open world — without requiring visitors to carry anything beyond the phone already in their hand.
The system relies on wall-mounted anchors that broadcast signals to nearby smartphones. Crucially, the phones themselves perform the positioning calculations rather than transmitting data to a central server — a design choice that preserves user privacy while keeping the system responsive even in dense crowds. Eforthink says it is among the first to demonstrate this reliably across both iPhones and Android devices, a milestone that matters as UWB chips become increasingly standard in flagship models.
The practical range of applications is broad: shopping malls, airports, hospitals, museums, stadiums. In each setting, visitors can be guided floor by floor, corridor by corridor, without downloading a dedicated app. For the venues themselves, the technology offers something equally valuable — insight into how people actually move through a space, which routes they favor, where they slow down, and where confusion or congestion accumulates.
Eforthink is not positioning itself as a consumer product but as an infrastructure layer, offering software development kits and APIs to mapping platforms, venue operators, and system integrators worldwide. The company's broader ambition is to do for indoor navigation what GPS did for the outdoors — making orientation inside large, complex spaces as routine and reliable as finding one's way down an open road.
A Chinese technology company called Eforthink has built a system that turns any smartphone with ultra-wideband capability into a precise indoor positioning device, accurate to within centimeters. The announcement, made in mid-June from the company's base in Chengdu, marks a significant step toward making large indoor spaces as navigable as the outdoors—without requiring visitors to carry special tags or handheld gadgets.
The system works through a network of wall-mounted anchors that broadcast signals to smartphones. Rather than sending location data back to a central server, the phones themselves do the math, calculating their exact position based on the time it takes signals to arrive from multiple anchors. This downlink architecture—the technical term for this receive-only approach—keeps user data local and private while allowing the system to handle dense crowds without bogging down. Eforthink says it is among the first to prove this works reliably on both iPhones and Android devices, a milestone that matters because smartphone makers have been gradually adding UWB chips to their flagship models over the past few years.
The practical applications are straightforward. In a shopping mall, a visitor's phone can guide them from the entrance to a specific store, then to the parking garage. At an airport, the system handles multi-floor wayfinding through terminals and gates. Hospitals can use it to help patients and families navigate to the right department. Museums and exhibition centers get turn-by-turn directions through galleries. Stadiums can guide fans to their seats. None of this requires the visitor to download a special app or carry anything extra—just a phone that already has UWB built in.
For the venues themselves, the technology offers something equally valuable: data. By tracking how visitors move through a space—which corridors they use, how long they linger in certain areas, which routes they take—operators gain insights into foot traffic patterns. They can identify bottlenecks, optimize store placement, improve emergency evacuation routes, and measure the effectiveness of signage. A shopping mall can see which anchor tenants draw the most visitors. A hospital can ensure wayfinding reduces patient confusion and wait times. An airport can smooth the flow of passengers through security and gates.
Eforthink is not positioning itself as a finished product for end users. Instead, the company is offering the underlying technology to other businesses through software development kits and application programming interfaces. This means mapping platforms, venue management systems, ticketing companies, and location services can all integrate Eforthink's positioning engine into their own offerings. The company is actively recruiting global partners—venue operators, technology firms, system integrators—to build real-world applications and expand the range of use cases.
The timing reflects a broader industry shift. Ultra-wideband has been around for years, but it remained niche, used mainly in specialized industrial settings. As smartphone makers have begun including UWB chips as standard, the technology has moved from the margins toward the mainstream. Eforthink's announcement suggests the next phase: turning that hardware into a practical service that venues and visitors actually use. The company's goal is to make UWB-based indoor navigation as routine as GPS outdoors, transforming how people move through and understand large indoor spaces.
Notable Quotes
The solution turns smartphones into positioning devices, eliminating the need for dedicated user-side tags or handheld devices while delivering high-precision navigation and operational insights.— Eforthink announcement
The Hearth Conversation Another angle on the story
Why does it matter that the phone does the positioning calculation itself rather than sending data to a server?
Privacy, first—your location stays on your device. But also scale. If millions of people in a crowded airport all had to send their position data to a central system, the network would choke. By doing the math locally, the system can handle dense crowds without latency or bottlenecks.
So the anchors just broadcast. They don't track individual phones?
Exactly. The anchors are passive. They send out signals on a schedule. Your phone listens and calculates where it is. The venue operator never sees your raw location unless you choose to share it—say, by opening a navigation app.
What's the actual accuracy we're talking about here?
Centimeter-level. That's precise enough to tell you which side of a hallway you're on, which store entrance you're approaching, which floor of a hospital you're standing on. GPS gives you meters. This gives you inches.
Why hasn't this existed before?
The hardware wasn't in phones. UWB chips are expensive and power-hungry. Only in the last few years have flagship phones started including them. And the software—the algorithms that turn raw signal timing into position—that took time to develop and validate across different phone models and operating systems.
What's the business model? Does Eforthink sell the anchors?
They're offering the whole stack—anchors, software, algorithms—through partnerships. A mall or airport would license the system, install the anchors, and integrate it with their own apps or ticketing systems. Eforthink gets paid per venue or per deployment.
And the venue gets visitor flow data in return?
Yes. They can see how people move, where they pause, which routes are popular. That's valuable for operations, marketing, and safety planning. But the individual visitor's location data stays encrypted on their phone unless they explicitly opt in to share it.