What Internal Communication Tools Work Best for Frontline Teams

My previous and current companies, we have used tools like Slack and Microsoft Teams for quick team communication, but for frontline and mobile employees, we found mobile-first platforms work much better. Recently, we have been exploring MirrorFly because it supports real-time messaging, channels, read receipts, and shift-based announcements in a more frontline-friendly way.

Some teams also use project management tools like Asana for task tracking and coordination.

What internal communication tools do you use at your organization?