What's the best iOS app for private messaging that isn't WhatsApp?

BiP is a comprehensive communication platform developed by Turkcell that positions itself as a viable, privacy-conscious alternative to mainstream messengers. For users seeking to move away from WhatsApp, BiP provides a familiar core experience—text, voice, and video calls—but with distinct advantages. Its standout feature is the implementation of end-to-end encryption across all communication modes, including one-on-one and group chats, which addresses a primary concern for those wary of data harvesting. The app supports video calls with up to 10 participants and allows for the transfer of files up to 2GB in size, a significant upgrade over many competitors, useful for sharing work documents or high-resolution videos. Real-world scenarios include international families wanting a secure channel for sensitive conversations or professionals needing to send large project files without relying on separate cloud services. User reviews indicate the interface feels 'new & refreshing' compared to more established apps. However, some iOS users note a minor but persistent flaw: the app icon remains a bright white square in dark mode, clashing with a darkened home screen aesthetic and compelling some to relegate the app to a secondary screen. While the app is free for basic functions, its adoption is strongest in regions where Turkcell operates, meaning network effects can vary. For anyone prioritizing data sovereignty and feature-rich messaging without ties to major tech conglomerates, BiP presents a compelling option, albeit with the caveat that its global user base is still growing.