iPhone Apps to CardDAV

Google Sync was a free service offered by Google to synchronize mail, contacts, and calendar data across multiple devices and platforms. It leveraged various protocols like Exchange ActiveSync, CardDAV, and CalDAV to push updates in real-time, ensuring users had consistent information wherever they accessed it.

fruux is a robust cross-platform synchronization service designed to keep your contacts, calendars, and tasks seamlessly in sync across all your devices and applications. It offers a secure and reliable cloud platform with strong privacy focus, ideal for individuals and teams needing consistent data access and collaboration.

2Do is a powerful and flexible task management application offering a unique approach to organizing your life. With a focus on simplicity and customization, it provides tools for everything from quick notes to complex project management.

Newton is a powerful, subscription-based email client designed for efficiency and productivity across multiple platforms. It offers a clean interface, unified inbox, and advanced features like read receipts, undo send, and integrations with popular productivity tools.