Fire Message is described as 'Chat wirelessly over Bluetooth Low Energy. No internet required' and is an app in the Social & Communications category. There are five alternatives to Fire Message for Online / Web-based, Android, iPhone, Facebook and Facebook Messenger. The best alternative is Briar, which is both free and Open Source. Other great apps like Fire Message are Facechat (Free), NickEgo (Free), Bridgefy (Free) and WorldChat (Free).
An open-source decentralized and encrypted messaging app even without internet connection via Wi-Fi and Bluetooth. Messages are stored securely on your device, not in the cloud. Connect directly with nearby contacts - no Internet access is required.