Talk to your hiking group where the phone shows no bars
SpeakMic Offline turns the group's Android phones into walkie-talkies that connect directly to each other — no mobile network, no internet, no radios to carry. The guide can also broadcast to the whole group.
How it works
Install before you set off
Everyone installs SpeakMic Offline on their Android phone while there's still internet.
Create a room at the trailhead
The guide creates a room and the group joins with its 6-digit code.
Press and talk on the trail
The phones relay the audio to each other, so the group can stretch out along the trail.
Why groups use SpeakMic Offline
Phone to phone, no network
WiFi Direct and Bluetooth between the phones themselves — no mobile signal needed at all.
Phones relay each other
Each phone passes the audio on, reaching about 250–350 m across the group without line of sight.
Walkie-talkie or broadcast
Everyone talks in turn (up to 20), or the guide talks to up to 30 listeners.
Frequently asked questions
Does it work on iPhone?
No. SpeakMic Offline is Android only, and every phone in the group needs the app.
How far apart can we be?
A direct link reaches as far as WiFi Direct or Bluetooth do; with phones relaying for each other, a group spread over roughly 250–350 m stays connected.
Is it a safety device?
No. It doesn't replace an emergency beacon, a radio or calling emergency services — take what your route requires.
How much battery does it use?
More than a phone in standby, since the radio and audio stay on. Bring a power bank on longer hikes.
Built for real situations
Outdoor instructors
Ski, bike, kayak or nordic walking — talk to the whole group on the move, they hear you in their earbuds.
Learn more→Tour guides
Great for city walks, museum tours, and food tours — your whole group hears you clearly through their own phone, no rental headsets.
Learn more→School trips
A whole class hears the teacher or guide through their own earbuds in a noisy museum — and the staff stay in touch over walkie-talkie.
Learn more→Walkie-talkie
Ideal for festivals, volunteer teams, and event crews — push to talk and your whole team hears you, no radios required.
Learn more→Event volunteers
Marshals at the course, the finish line, the parking — a push-to-talk room per team on the phones they already have.
Learn more→See all ways to use SpeakMic
Broadcasts, relay rooms, and walkie-talkie — explore everything SpeakMic can do.
Learn more→Heading out of signal range?
Install SpeakMic Offline from Google Play before you leave.
Install