Murmur: Bluetooth Group Calls

PRODUCT

When you're in a remote area, on a trail, or at a crowded event, group communication can break down. Cellular networks are unreliable, and Wi-Fi isn't always available.

Murmur solves this by creating a peer-to-peer Bluetooth mesh network between devices in your group — allowing clear, hands-free voice communication without depending on any internet connection. Just open the app, create or join a group, and start talking.

How Murmur Works

ACTIVITIES

Murmur is designed for group activities where reliable communication matters — whether you're on the trail, on the road, or at an event.

Outdoors

"Great app for local message passing via Bluetooth, ideal for exercise groups such as hiking and cycling." Google Play Store Review - Bridgette

Motorbikes

"I had a hard time searching for a Bluetooth-based calling app, and this one takes the cake! Everybody else is offering tap-to-speak like walkie talkie, which is useless during riding." Google Play Store Review - Louie

Field Trips

"Interesting application that does what it claims pretty well! I could see this being useful for walking tours or outdoor classes that don't necessarily have internet accessible." Google Play Store Review - Jaime

Indoor Events

Perfect for exhibitions, concerts, and guided tours where crowd noise and poor connectivity make group communication difficult. Murmur keeps your group connected without relying on venue Wi-Fi.

FEATURES

Built on Bluetooth LE technology, Murmur provides reliable communication without depending on cellular or Wi-Fi networks.

2–16 People per Group

Supports small to medium groups with voice calls for up to 16 participants simultaneously.
Peer-to-Peer Mesh Network

Devices connect directly to each other using Bluetooth LE, forming a mesh network that extends communication range beyond single Bluetooth connections.
Message

Send text messages to your group when voice communication isn't convenient — useful in quiet environments or for sharing quick notes.
Resume Groups

Pick up where you left off. Murmur remembers your previous groups so you can rejoin them quickly without starting from scratch.
Hands-Free

Works seamlessly with Bluetooth headsets and other hands-free devices, keeping your hands free while you communicate.
AES Encrypted

Use passwords for secure groups. All connections are secured with AES-128 encryption to protect your communications.
Cross-Platform Compatible

Available on both iOS and Android, so your whole group can stay connected regardless of their device.