No internet · No cell signal · No router needed

Walkie-talkie & broadcast without internet or cell signal

SpeakMic Offline connects nearby Android devices over WiFi Direct and Bluetooth — no router, no SIM card, no internet. Or use local WiFi mode to connect everyone on the same network without Bluetooth. Up to 20 push-to-talk participants or 30 broadcast listeners.

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Mesh

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How it works

Install on each device

Download and install SpeakMic Offline on every Android device in your group — no internet needed after installation.

Create or join a room

One person creates a room; others join by code or tap a nearby open room. Choose WiFi Direct + Bluetooth for outdoor or no-router use, or local WiFi mode for office and venue networks.

Press and talk

Hold the PTT button to speak — everyone hears you instantly. Multi-hop mesh relaying extends range far beyond direct Bluetooth or WiFi Direct radius.

No internet? No problem.

WiFi Direct & Bluetooth

Connects directly device-to-device with no hotspot, no router, no SIM card. Works anywhere — mountains, underground, at sea, at festivals.

Multi-hop mesh relay

Devices relay audio through each other, extending group range to ~350 m — far beyond the direct Bluetooth or WiFi Direct radius, with no line-of-sight required.

Broadcast mode

One speaker, many listeners — ideal for tour guides, instructors, and anyone who needs to address a group without cellular or internet.

Local WiFi mode

On a shared WiFi network, connect every Android device in the room through the router — no Bluetooth needed. Great for offices, classrooms, and conference rooms.

Where cellular networks don't reach

Mountains, festivals, remote locations, underground venues, emergency drills, sailing — anywhere you'd reach for a radio, SpeakMic Offline is a free alternative that runs on the Android phones your team already has.

Android apps

SpeakMic for Android

Background audio with screen locked — a foreground service keeps broadcasts and walkie-talkie sessions alive.