Sling Photos moves
your photos. You protect them.

Sling Photos gets you to two copies on two media types. To complete the 3-2-1 rule, add one more. Options that work well alongside Sling Photos include iCloud Photos (for an encrypted cloud backup), Backblaze Personal Backup (for whole-drive cloud backup), or a second external drive kept at a different location.

Sling Photos is a photo transfer and archiving application. It copies photos from your iPhone photo library to a storage device of your choosing over your local Wi-Fi network. This is what it does well and what it is designed to do.

Sling Photos is not:

• A backup solution in the professional sense of the word. A backup implies multiple copies, versioning, and verified recoverability. Sling Photos creates one organised copy on one drive.
• A replacement for iCloud, Google Photos, or any cloud photo service if you use those for cross-device access or convenience.
• A guarantee against data loss. File verification confirms that each file transferred correctly during the transfer session. It does not monitor the health of your drive over time or detect if files become corrupted after transfer.
• A RAID replacement. RAID (Redundant Array of Independent Disks) protects against drive failure within a NAS. Sling Photos has no knowledge of your drive's RAID configuration and does not substitute for it.

Sling Photos verifies every file it transfers by comparing a checksum of the source file on your iPhone against a checksum of the transferred file on your drive. If the checksums do not match, the app retries the transfer.

This verification confirms that each file arrived intact at the moment of transfer. It does not:

• Verify that files remain intact on your drive over time after the transfer session ends
• Monitor your drive for subsequent corruption, bit rot, or hardware failure
• Guarantee that files are readable by other applications or operating systems
• Protect against accidental deletion of files from your drive after transfer

In rare circumstances, network interruptions during transfer may cause files to be skipped or partially transferred. The app logs any such failures and reports them at the end of the transfer session. Always review the transfer summary and re-run the archive if any failures are reported.

Face recognition in Sling Photos uses Apple's Vision framework running on your device. While the technology is capable and improves with more enrolment photos, it is not infallible.

You should expect that face recognition will:

• Miss some photos, particularly those taken at unusual angles, in low light, or where the person's face is partially obscured
• Occasionally include photos of people who resemble your enrolled person, particularly photos of relatives
• Perform less accurately on photos from many years ago if the person's appearance has changed significantly
• Improve in accuracy as you add more enrolment photos showing the person at different ages and in different conditions

Do not rely solely on face recognition to ensure all photos of a person are captured. Use date-range archives or full library archives to supplement face-recognition-based archives for important occasions.

Sling Photos requires both your iPhone and your destination drive to be connected to the same local Wi-Fi network. The app does not work over cellular data, VPN connections that isolate devices from each other, or guest Wi-Fi networks that block device-to-device communication.

Transfer speed depends on your Wi-Fi network quality, the speed of your NAS or drive, and the number and size of files being transferred. Large archives of thousands of high-resolution photos and videos may take significant time. We recommend:

• Keeping your iPhone plugged in during large archives
• Ensuring both devices remain on the same Wi-Fi network throughout the transfer
• Not putting your iPhone into Low Power Mode during an active archive, as this may limit background processing
• Running large archives when your NAS is not under heavy load from other tasks

Compatibility with all NAS brands and firmware versions cannot be guaranteed. SMB protocol implementation varies between manufacturers and firmware versions. If you encounter compatibility issues with a specific device, please contact support with your NAS brand, model, and firmware version.

The information and functionality provided by Sling Photos is offered in good faith and to the best of our ability. However, Ohh Wow Labs makes no warranty, express or implied, regarding the completeness, accuracy, reliability, suitability, or availability of the application or the information it produces.

Any reliance you place on Sling Photos for the preservation of irreplaceable photographs or videos is at your own risk. We strongly recommend that you:

• Maintain multiple copies of irreplaceable photos across different storage media and locations
• Periodically verify that archived files on your drive are accessible and uncorrupted
• Do not delete photos from your iPhone until you have confirmed they have been successfully archived and that the archived copies are accessible
• Keep your drive firmware and NAS software up to date to maintain SMB compatibility

To the maximum extent permitted by applicable law, Ohh Wow Labs shall not be liable for any loss of data, loss of photos, or any direct or indirect damages arising from your use of Sling Photos or reliance on it as a preservation solution. Please refer to our Terms of Use for the full limitation of liability statement.

This page should be read alongside our full legal documents.