Walkie Talkie PTT · Trailcall

Trailcall is an offline walkie talkie: push-to-talk with nearby phones when there is no signal, no Wi-Fi and no data. No internet, no SIM, no account; phones find each other over Bluetooth and Wi-Fi.
Free: unlimited push-to-talk and SOS. Plus: text messages, group radar (direction, distance, battery), location sharing, drop-off alerts, no ads.
Trailcall must be installed on every phone you want to talk to; it only works between phones running Trailcall, not with hardware radios. Range depends on the surroundings, usually tens of metres in the open.

How it works
1. Everyone installs Trailcall and grants the Bluetooth and microphone permissions.
2. Pick a channel and an optional PIN, or share them with a QR code or an invite link so friends join the same channel.
3. Hold the big button, talk, release. Nearby phones on your channel hear you through the loudspeaker. Up to 8 phones can share a channel.

Free features
• Unlimited push to talk: no quota and no daily limit (a single transmission lasts up to 60 seconds)
• Channels 1–16 and an optional 4-digit group PIN
• List of connected people with signal-quality bars
• Compass showing magnetic north
• QR code and invite link to join the same channel
• Works with the screen off, with an ongoing notification
• Big talk button you can use with gloves, screen lock against accidental touches
• Optional talk with the volume key, roger beep, dark theme
• See messages and locations your friends send
• SOS: a free call for help to nearby Trailcall phones, even on another channel (see below)
• Turkish, English, German, Spanish, Brazilian Portuguese, French, Italian, Indonesian and Arabic

The free version shows ads: a banner on the main screen, and a full-screen ad only when you leave a channel, at most once every 3 minutes and never while you are talking or listening. Ads need internet; the walkie talkie does not.

Trailcall Plus
• Send text messages and 5 quick messages, 500-message history
• Group radar: direction, distance, last seen and battery level of everyone on the channel
• Send your location: one-time and live (receiving is free for everyone)
• Drop-off alert: if someone stops responding for 2 minutes, a notification with their last seen location
• Up to 5 saved spots for the compass
• Replay the last 20 transmissions
• Private channels: 99 channels and a 6-digit PIN (friends you invite join for free)
• No ads
• Gift a friend 30 days of Plus, in person and offline
Plus is a one-time purchase: a 1-day pass or Lifetime. No subscription, nothing renews automatically.

Who it is for
Hiking and camping groups, festivals, ski and bike groups, families in a park: anyone who stays close together but is out of earshot or out of coverage.

Privacy
No server, no account. Your voice travels only between the phones on your channel and is never uploaded anywhere. Messages kept for replay stay on your device.

SOS
SOS is free for everyone. It broadcasts your location, battery level and a short message to nearby Trailcall phones, including phones on another channel. It only reaches phones that have Trailcall installed and open; it does not call emergency services and it does not replace proper equipment. If you can, also call your local emergency number. It is not a substitute for official emergency services; if you can, call 911.