Group location with no gaps. Privacy with no compromises. Up to 200 active members per group, AES-256-GCM end-to-end encryption.
High-precision real-time tracking for field teams, tour guides and families. Advanced sensor fusion with a Kalman filter and a Zero-Knowledge server: nobody outside the group can see where they are.
Available on iOS and Android · Regionally adapted pricing
Where other apps give up, GroupFinder keeps tracking.
Forget signal loss indoors, in urban canyons or dense forests. We combine multiple position sources and advanced statistical filtering to keep every member's location always available.
Advanced sensor fusion
We combine GPS + WiFi + BLE together with Dead Reckoning through a Kalman filter. When the satellite signal drops, the device's accelerometer and gyroscope compute each member's exact position.
Massive scalability
Robust, optimized support for up to 200 active members per group simultaneously, without degrading battery life or real-time map latency.
How we fuse GPS, WiFi, BLE and Dead Reckoning
This animation shows in real time how the system blends noisy readings from multiple sensors and converges to the real position under a Kalman filter. When GPS drops, the other sensors compensate.
Convergence under noise
Every group member is tracked by three independent sensors: GPS (high precision under open sky), BLE/WiFi (stable indoors) and the inertial unit (accelerometer + gyroscope). The Kalman filter dynamically weights each source by its instantaneous noise.
When a GPS satellite is lost behind a tunnel or a building, the indicator in the top right corner switches to GPS lost — and the system keeps working without the user noticing the dropout.
- Estimated trajectory with sub-meter error in optimal conditions.
- Automatic recovery when satellite signal returns.
- Smart battery saving: adjusts sampling to context.
Absolute privacy. By design, not by promise.
Your location and your group's location is the most sensitive data there is. GroupFinder is built on the Zero-Knowledge principle: the server cannot see what we protect on the device.
AES-256-GCM E2E encryption
All location and map data is encrypted on the device before being sent. Nobody outside the group can see where they are.
Zero-Knowledge server
Our server acts only as a blind relay. We do not store, see or sell your location data. Even if the server were compromised, your data stays unreadable.
Global compliance
Designed under GDPR (Europe) and COPPA (US protection of minors) standards, fit for both corporate and family use cases.
Built for real groups on the move.
Real-time map, encrypted chat, perimeter alerts and all-day battery. All under the same military-grade encryption layer.
Real-time encrypted chat
Fluid in-group communication built right into the map, protected by the same AES-256-GCM encryption layer as the locations. No middle servers reading, no exportable metadata.
- End-to-end encrypted messages and media.
- History synced across the user's devices.
- Optional, respectful read receipts.
GCM with keys derived on the device, not in the cloud.
Proximity alerts and geofencing
Define safe perimeters on the map and get instant notifications if any team member or family member moves outside the set radius. Built for school days, group outings and defined work zones.
- Editable circular or polygonal geofences on the map.
- Entry, exit and prolonged-stay alerts.
- Notifications targeted by role inside the group.
Smart battery consumption
Optimization algorithms regulate sensor usage based on movement speed and context: asleep in a backpack, walking, in a vehicle. Avoids rapid energy drain even on long field days.
- Context-adaptive sampling (still / walking / driving).
- Traffic compression under slow cellular networks.
- Automatic low-power mode below 20% battery.
Typical autonomy on field days with adaptive sampling.
Three audiences. One technology.
The same architecture serves critical operations, large-group tourism and family peace of mind. Each profile gets controls and pricing matched to its scale.
Field teams
Pinpoint coordination for rescue, logistics and maintenance crews in areas with intermittent connectivity. Critical operations where losing a technician costs time and money.
Tour guides
Stay in control of large groups (up to 200 people) in crowded cities or natural trails without losing sight of anyone. Geofencing by point of interest.
Families
The peace of mind of knowing where your kids or older adults are, under a strict privacy policy that protects minors with COPPA compliance.
Fair access to security technology.
Our plans come with prices localized to your currency and market: ARS, USD, EUR, GBP. Same features, cost adjusted to regional purchasing power.
- Full AES-256-GCM E2E encryption
- Encrypted chat and media
- Unlimited geofences
- 30-day history
- COPPA compliance for minors
- Everything in Family
- Extended history (1 year)
- Roles within the group
- Track export (KML / GPX)
- Priority email support
- Everything in Professional
- 24/7 support with SLA
- Dedicated deployment (on-prem optional)
- Custom integrations (API)
- Annual security audit
Ready to take your group's location to the next level?
Protect your loved ones. Coordinate your team. Stay in control, privately. No card to start, no commitment, no data shared with third parties.
- Guided 30-minute demo using your real use case.
- Regional written quote within 48 hours.
- No card, no commitment, no newsletter afterwards.
Monday to Friday · 09:00 to 18:00 (ART)
More Thelio AI solutions: thelio-ai.com.ar