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No internet · No SIM · No account needed
Your team, connected - even off the grid.
Private messaging and live locations for hikers, campers, volunteers, and families beyond cell coverage.
No signal, no subscriptions - just tap Need Help and your team knows exactly where you are.
- Private team chat
- Live tracking
- Need Help alerts
- No mobile coverage needed
- iPhone & Android
See Nelos in action
Message your team. See where everyone is. Request help when it matters.
One team. One story.
No account, no cell service - just your radios and the people you trust.
Maps download for offline use, and standalone trackers cover pets, gear, or vehicles too - no phone required.
Need Help, answered by your team
One tap sends your exact location to everyone on your team - instantly, over your own radios.
Built for the moment you need it
- Tap Need Help - no typing, no menus
- Alert and location go out over your mesh radios
- Pinned instantly on your whole team's map
- Everyone can coordinate the response in chat
An honest note on safety
Nelos is not a replacement for emergency services, satellite messengers, or professional rescue systems - it's a coordination tool for your own team. Always carry appropriate safety equipment and a way to reach professional help.
One private team experience
Nelos works the same way whether your team uses MeshCore or Meshtastic®-compatible radios - and it's tested in the field, not just in a lab.
MeshCore
Lightweight firmware built for simple, reliable off-grid networks.
Same Nelos experience
Meshtastic®
The most widely adopted open-source LoRa mesh firmware.
Nelos is independent and not affiliated with or endorsed by the MeshCore or Meshtastic projects. Meshtastic® is a trademark of Meshtastic LLC.
Privacy by design
Your team's communication stays between your own devices - no account, no phone number, no central server, ever.
- No account required
- No phone number required
- No central message server
- Your own LoRa mesh radios carry your data
- Privacy-focused by design
Built for teams beyond cell coverage
One app, wherever your group needs to stay together.
Get your team started in minutes
Pick MeshCore or Meshtastic®, connect a radio over Bluetooth, and invite your team - no account required.
Frequently asked questions
Honest answers about what Nelos does, and what it doesn't.
Does Nelos need internet?
No. Nelos communicates over your own LoRa mesh radios. Internet is only used for optional map downloads and app updates - never for messaging or location.
Does Nelos need mobile signal?
No. Nelos is built for places where cell signal is weak, overloaded, or gone entirely. Your team talks over LoRa mesh, not the carrier network.
Which firmware does Nelos support?
Nelos works with MeshCore and Meshtastic®-compatible LoRa devices, with the same app experience on either.
Why MeshCore and Meshtastic®?
They're the two leading open LoRa mesh firmware ecosystems, each with its own hardware and community. Supporting both means you're not locked into one - Nelos gives you a consistent experience across either.
How far can Nelos communicate?
Range depends entirely on your LoRa radios and environment - antennas, elevation, obstructions, repeater nodes, and radio settings. In dense terrain that may be under a kilometer per hop; with clear line of sight, elevation, or repeaters, a mesh can span much farther.
Can it really reach hundreds of kilometers?
In favorable conditions - long line-of-sight paths, elevated antennas, or a chain of repeater nodes - LoRa mesh links spanning hundreds of kilometers are possible and have been demonstrated. It is not typical for everyday terrain and is never guaranteed.
Do I need an account?
No. There's no sign-up, no phone number, and no profile. Connect a device and start a team.
Is there a central server?
No. Nelos does not run a chat or location server. Your team's messages and locations travel only over your own LoRa mesh radios.
Does Nelos work on iPhone and Android?
Yes. Nelos is free on the App Store and Google Play.
Can I use it for family tracking?
Yes. Families use Nelos to keep an eye on each other at theme parks, campsites, ski trips, and anywhere phones lose signal.
Can I use it for pets or belongings?
Yes. Attach a compatible LoRa device to a pet, bag, or vehicle and add it as a tracker - it shows up on your team's offline map without needing a phone of its own.
Can I use it for hiking, camping, airsoft, or rescue teams?
Yes - these are core use cases. Nelos is built for small teams that need to communicate and see each other's positions without relying on mobile networks.
What hardware do I need?
A MeshCore or Meshtastic®-compatible LoRa radio per person or tracker, connected to Nelos over Bluetooth. See Getting Started for supported devices.
Can I switch between MeshCore and Meshtastic® later?
Often, yes - many LoRa radios can be reflashed to run either firmware. Support varies by hardware model, and switching firmware means reconfiguring that device as if it were new.
Is range guaranteed?
No. LoRa range depends on terrain, antennas, repeater coverage, radio configuration, weather, and local regulations. We describe realistic ranges, not guarantees.
Is Nelos a replacement for emergency services?
No. Nelos is a coordination tool for your own team, not a substitute for emergency services, satellite messengers, or professional rescue systems. Always carry appropriate safety equipment and a way to reach professional help.
Ready to stay connected without the internet?
Free, no account, works offline. Try it with your MeshCore or Meshtastic®-compatible device.