Sync - Secure cloud storage

Sync is a secure cloud storage app that prioritizes privacy and data protection for personal and professional use. With end-to-end encryption, it ensures only you can access your files, making it a reliable choice for encrypted file sharing and privacy-focused cloud backup. The app offers 5 GB of free storage and allows you to access, upload, and share documents, photos, and videos across devices.

Key Features and Limitations

Sync provides real-time backup, advanced sharing options, and custom branding for businesses, but it does have some limitations worth considering. First, the app does not transcode or re-encode videos, meaning high-bitrate files (such as 4K content) can cause constant buffering or fail to stream over slower connections — users must manually re-encode such files to a lower bitrate. Second, on iOS devices, video streaming is only supported over WiFi, not mobile data, which can be inconvenient for on-the-go access. Third, supported file types for streaming are limited to common codecs like MP4, MP3, and MOV; unsupported formats (e.g., certain audio codecs) may result in no audio or a blank player screen.

User Experience and Privacy

The app integrates with Windows Explorer and Mac Finder through CloudFiles, letting you browse and access cloud files without taking up local storage. Uploading from other apps is straightforward via the share icon, and manual uploads include a long-press selection for bulk files. Sync’s end-to-end encryption ensures your data remains unreadable by anyone else, including Sync itself, which adds a strong layer of trust for sensitive documents or personal media.

For troubleshooting, the app provides clear suggestions for common streaming issues, such as re-encoding high-bitrate videos or switching to supported audio types. While these steps require some technical knowledge, they give users control over playback quality. Overall, Sync balances robust security with realistic usage constraints, making it suitable for users who value privacy but are willing to manage video compatibility themselves.