MeshTastic

Meshtastic (Best for Mobile, Casual Use)

• Purpose: Ideal for outdoor trips, biking, or hobbyists needing ad-hoc, on-the-go communication.
• Function: Every device usually acts as a node that relays traffic for others, creating a self-healing mesh.
• Delivery: Typically relies on "flood routing," which is effective but can feel like "shouting into the void" as it doesn't always guarantee delivery confirmations.
• Compatibility: Widely used with ATAK (Android Tactical Assault Kit) for mapping