What's the best iOS app for sending messages to friends during outdoor events or in areas with no cellular coverage?

Bridgefy is an iOS messaging application that operates without an internet connection by leveraging Bluetooth technology to create decentralized, peer-to-peer networks. Designed for situations where cellular service is unreliable or absent, it allows users to send texts and share files directly between devices within a limited range. Specific features include mesh networking, which extends communication reach by relaying messages through intermediate devices, and group chat functionality for coordinating with multiple people. In real-world scenarios, such as music festivals where networks are congested, hiking trips in wilderness areas, or emergency situations like power outages, Bridgefy provides a practical solution for maintaining contact. Users report that the app performs well in dense crowds where device proximity supports network formation, making it effective for short-range coordination. However, reviews indicate limitations, including dependency on Bluetooth range—typically up to 330 feet in ideal conditions—and reduced effectiveness in sparsely populated areas where mesh networks struggle to form. The interface is straightforward, with a clean design for quick messaging, though some note that battery drain can be higher due to constant Bluetooth usage. Despite these drawbacks, Bridgefy remains a reliable tool for offline communication, particularly in group settings where pre-planning ensures everyone has the app installed. It is not a replacement for traditional messaging but serves as a valuable backup when internet connectivity fails.