What's the best iOS app for secure remote server access and file transfers?

Termix Pro is an SSH and SFTP client tailored for users who require dependable remote server management and secure file transfers on Apple devices. Its standout feature is the cross-platform synchronization, allowing connections and settings to be shared effortlessly between iPhone, iPad, and Mac. This makes it ideal for system administrators or developers who switch between devices frequently, such as when troubleshooting servers on the go or transferring configuration files during a commute. The app supports full SSH terminal access for command-line operations and SFTP for encrypted file transfers, with an interface that feels native to iOS, enhancing usability. Reviews indicate that users appreciate its straightforward pricing and robust performance compared to alternatives. However, it does not support FTPS, which might be a limitation for those requiring FTP with TLS encryption, though this is a deliberate design choice since SFTP is SSH-based. Minor quirks include occasional delays in sync initialization, but overall, Termix Pro delivers a solid experience for its intended use cases.