Hamster PhotoBackup Terms of Use

Effective date: October 29, 2026

Operator: Shanghai Xiangsu Hangji Technology Co., Ltd. (上海像素航迹科技有限公司, "we" or "us")

Welcome to Hamster PhotoBackup (仓鼠相册, "the Software"). The Software has two parts: the computer app turns your own computer into a photo library, and the phone app backs up the photos on your phone to that computer over your local network as-is and lets you browse the library. If this English version differs from the Chinese version, the Chinese version prevails.

Please read these terms carefully before downloading, installing or using the Software, especially the disclaimers and limitations shown in bold. By using the Software, you confirm that you have read and agree to these terms. If you do not agree, please stop using and uninstall the Software. Minors should read these terms with a parent or guardian and use the Software with their consent.

1. What the Software does

The Software lets you pair a phone and a computer over your local network; back up photos and videos from the phone's photo library, as-is, to a folder you choose on the computer; browse the computer library on the phone and save photos from it back to the phone; delete photos on the phone that are already verified on the computer, after you explicitly confirm, to free up space; and use helpers such as random review and finding similar photos (iPhone only).

The Software needs both the phone app and the computer app. With only the phone app, you can view and organize photos on the phone, but you cannot back them up or browse a computer library. The phone app supports iPhone and Android phones, and the computer app supports Mac and Windows computers.

The Software works only within your home or office local network. We provide no cloud storage, remote access over the internet, online drive or account service, and your photos are never uploaded to our servers or anyone else's.

2. Your photos and data

You always own the photos, videos and metadata you back up, browse or organize with the Software. The Software only reads, transfers and writes them between your own devices as you direct, and we never obtain, view or use them.

The library folder on your computer is where your backup lives, and it may be the only copy. Please take good care of the computer or drive that holds it, and we recommend copying the library folder to another drive or storage medium regularly. The Software cannot recover losses caused by a damaged, lost, deleted or accessed drive.

Photos in the library are plain files with readable names, so you can open and copy them with the tools built into your system even without the Software.

3. Acceptable use

Use the Software only for photos and videos you have the right to handle. Do not use it to store or distribute content that breaks the law or infringes anyone's portrait, privacy, copyright or other rights.

Pair only phones and computers you trust. Pairing requires matching the same 6-digit number on both devices and approving on the computer, or using a one-time QR code on the computer that is valid for 5 minutes. Do not share screenshots of the pairing code. If you find a device you do not recognize, unpair it right away on the Devices page of the computer app.

You may not reverse engineer, decompile or crack the Software, circumvent its payment limits or technical protections, or use it for any activity that harms network security.

4. Deleting photos

The Software never deletes your photos on its own. Every deletion requires your explicit choice and works as follows:

Deleting photos on the phone. Only photos whose original files are all verified on the computer appear in "Delete backed-up photos from this phone". The count and size are shown before deletion and the phone asks you to confirm again. On iPhone, deleted items go to Recently Deleted, where you can recover them in the Photos app for 30 days; on Android 11 or later they go to the system trash, and earlier Android versions delete them permanently. If your iPhone uses iCloud Photos, deletion also applies to iCloud and other devices signed in to the same Apple Account; this is how iOS works.

Deleting in the Software's library. Photos go to the library Trash, disappear on all paired devices, and are permanently deleted after 30 days. You can restore them until then.

Deleting in the phone's photo gallery. Files already backed up on the computer are not deleted; the computer only notes that the photo is "no longer on this phone".

5. Payment and quota

The Software is free to download and use. The free version includes a backup allowance when you first pair and a daily allowance per phone after that; the app shows the exact amounts. On iPhone, you can make a one-time In-App Purchase on the App Store to unlock unlimited backup. The purchase does not change transfer speed or fidelity; free and unlimited backups have exactly the same quality.

Photos already backed up to the computer can always be browsed, exported, saved back to the phone or deleted from the phone, whether or not you pay.

In-App Purchases are processed by Apple through the App Store. Prices are as shown in the App Store, and payment, refunds and Family Sharing are governed by Apple's terms. We do not handle and cannot access your payment information. A purchase covers everything in the current major version (for example 1.x); if a later major version adds new paid features, we will explain them separately, and buyers keep everything in the major version they bought.

6. Intellectual property

The Software's code, interface design, name, icon and other intellectual property belong to us and are protected by law. We grant you a personal, non-transferable, non-exclusive license to install and use the Software on devices you own or control. All rights not expressly granted in these terms are reserved.

7. Disclaimers and limitation of liability

Every file is verified with SHA-256 during backup, and we do our best to keep backups complete and accurate. However, because of device hardware, storage media, network conditions, operating system behavior and other factors, we do not promise that the Software will never be interrupted, make errors or lose data. Before deleting photos from your phone, make sure the library on the computer opens normally.

On iPhone, photos stored only in iCloud must first be downloaded from iCloud before they can be backed up, which uses network data, phone storage and battery; you decide whether to turn this on in Settings. Transfer mode keeps the screen on (shown as fully black), so we recommend keeping the phone plugged in.

To the maximum extent permitted by law, we are not liable for indirect losses or for loss of photos or data caused by using or being unable to use the Software, except for losses caused by our intentional misconduct or gross negligence. Where we are liable, our total liability is limited to the amount you actually paid for the Software.

We are not liable for interruptions caused by force majeure, telecommunications or network failures, or failures or changes in third-party systems (including iOS, Android, macOS, Windows, iCloud, the App Store and other app stores), but we will do our best to reduce their impact.

8. Changes and termination

We may update these terms as the product changes or as the law requires. Updated terms will be published on this page and in the app, and material changes will be clearly highlighted. By continuing to use the Software after an update, you accept the updated terms.

You may stop using and uninstall the Software at any time. Uninstalling does not delete the photos already backed up in the library folder on your computer; those files remain yours to keep using.

For copies of the Software obtained from the App Store, Apple's Licensed Application End User License Agreement also applies.

9. Governing law and disputes

These terms are governed by the laws of the People's Republic of China (for this purpose excluding the laws of the Hong Kong SAR, the Macao SAR and Taiwan). Any dispute arising from these terms should first be resolved through friendly negotiation; if that fails, either party may bring a lawsuit before the people's court with jurisdiction over the place where Shanghai Xiangsu Hangji Technology Co., Ltd. is domiciled.

10. Contact us

If you have any questions, comments or complaints about these terms, contact us and we will reply within 15 business days.

Email: support@pixeltrail.top