iPad Apps to Encrypted sync

Seafile is a powerful and secure file-hosting and collaboration platform designed for teams and businesses. It offers robust file synchronization, sharing, and versioning capabilities, with a strong focus on privacy and control through both cloud and self-hosted options.

MEGA is a secure, user-controlled cloud storage and file-sharing platform built with end-to-end encryption at its core.

SpiderOak is a highly secure, zero-knowledge cloud backup, sync, and sharing platform designed to protect your data from ransomware, hardware failures, and other threats. It offers robust end-to-end encryption, ensuring only you can access your files.