Talkie uses the bluetooth in your phone or computer to connect to others in the area. Bluetooth has a range of roughly 220ft, so in small areas like events, with groups of friends, or if you're out in the middle of nowhere, Talkie can be the hidden and encrypted network you need to communicate. 

Features
Encrypted Messaging
Send Images
Deletable Chat History
Chat History Deletes when clearing app cache
Password Protected
Range: 220ft
Supports Emojis
Custom Wallpaper
Custom Username
Custom Profile Pic
400 Characters per text
Optional Background Hosting
Supports 1v1 Chat