Contact by licence plate
The plate is the address. The person you're looking for is one search away, if they're registered on Numio. No name, no phone number needed.
Case study · Numio
Contact by licence plate, no phone number needed.
Numio connects vehicle owners in a new way: you can reach anyone by their licence plate, anonymously, quickly and directly, without publicly sharing your private phone number. We designed and built the app.
Try it
- Platform
- iOS and Android
- Sector
- Driver community, communication
- Languages
- English, German
- Service
- Concept, UX, mobile, backend
- 1licence plate is all it takes to get in touch
- 0phone numbers shared between users
- 2platforms: iOS and Android
- 6digit SMS code, verified users only
The challenge
How do you reach a driver you don't know?
Someone has blocked you in. Someone's headlights are still on. The car next to you has a flat tyre and the owner is nowhere to be seen. These situations happen every day, and they all share the same snag: there's no channel between two vehicle owners. What exists is either unreliable or comes at the cost of privacy.
A note on the windscreen
It smudges in the rain, blows away in the wind, and you never know whether the other person got it at all.
A phone number on the dashboard
Anyone can take a photo of it. You give your private number to strangers just to be reachable.
Helpless waiting
You've been blocked in, someone's lights are on, a tyre is flat, and there's no one to tell.
The old way
A note that may or may not get there.
The solution had to be faster, more reliable and more discreet than that.
The solution
Five steps from licence plate to conversation
Numio is built on a single insight: a licence plate is public, a phone number isn't. That became a flow you can complete in a minute.
Real screens from the app, with English and German interfaces.
Step 01: Create an account
A username and a password, no unnecessary data. Your profile is tied to your vehicles, not your phone number.
Step 02: SMS verification
A six-digit code confirms there's a real person behind the account. The system knows your number, other users don't.
Step 03: Vehicles in the garage
Car or motorbike, even several: with licence plate, model, year, mileage and your own photo.
Step 04: Search a licence plate
Type in the plate, and if the owner is registered, you can message them straight away. One search, no detours.
Step 05: Anonymous message and chat
Text or photo, with an instant push notification. The conversation continues in real-time chat, without phone numbers.
Features
Seven features, one goal: reaching the other person, safely
Numio doesn't try to do everything. It does the few things a vehicle owner really needs, and does them well.
User and vehicle profiles
One user, several vehicles. Cars and motorbikes in one garage, with technical details and photos.
Photo and content sharing
A photo says more: a flat tyre, a scratch, or just a beautiful car in the car park.
Chat between users
Real-time conversation with read receipts, the messaging experience people are used to.
Community features
Drivers, riders and enthusiasts in one place. Not only for alerts, but for getting to know each other too.
Secure communication
Verified users, anonymous contact, a protected channel. Privacy is not up for negotiation.
Push notifications
When someone writes, you know immediately. With headlights left on, minutes count.
Privacy and security
Not a feature. A principle.
An app that connects strangers by their licence plates can only work if users are sure they reveal only as much about themselves as they want. That's why in Numio, privacy and security aren't an afterthought, they're the starting point of the design.
Your phone number stays hidden
It's needed for verification, not for communication. The other party only sees your username and the licence plate.
Verified users
SMS code verification at registration. Real drivers instead of anonymous accounts.
Anonymous contact
You decide when and what you reveal about yourself. A licence plate is all a conversation needs.
Privacy by design
Encrypted connections, minimal data collection, and privacy considered from the very first screen designs.
Privacy and security are our top priority.
Community
Not just a messenger. A community for vehicle owners.
Numio is made for drivers, motorcyclists and vehicle enthusiasts who want an easy way to get in touch with each other. Thanks to the garage, vehicle profiles and photo sharing, the app stays alive even when nothing's wrong: a beautiful car in the car park is reason enough to write.
- Vehicle profiles with photos, technical details and even a for-sale label
- Drivers and riders in one community, not in separate apps
- A friendly gesture is reason enough to write, not just trouble
How it was built
From an idea to a working product, on two platforms.
We took Numio from concept to live operation: user experience, mobile app, backend and the security layer in the hands of one team. That way no details got lost between suppliers, and privacy didn't end up as a patch added later.
Concept and user experience
The licence-plate-based contact flow, balancing anonymity and trust on every screen.
Mobile app for iOS and Android
A native-feeling, dark, clean interface in Numio's own brand identity, on both platforms.
Backend and real-time chat
User and vehicle profiles, plate search, messages and photo sharing on a scalable backend.
SMS verification and push infrastructure
A six-digit code at registration and an instant notification for every new message.
Privacy by design
The phone number kept separate from the public profile, minimal data collection, secure communication.
Multilingual interface
English and German interface from launch, tailored to the target markets.
The same process as in all our projects
Our process in detail- 01
Business and technical discovery
- 02
Specification and solution design
- 03
Iterative development
- 04
Testing and rollout
- 05
Long-term support
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Contact
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