Last updated: 23 September 2026
Thank you for choosing Trace (the "App").
Trace is an item management tool developed and operated by Huang Zhijie ("we").
This Trace User Agreement (the "Agreement") is the valid agreement between you ("you") and us regarding the download, installation and use of the Trace service.
This Agreement, together with the Trace Privacy Policy, the Huawei Account Authentication Agreement (applicable when you sign in with a Huawei Account) and any other individual agreements, rules or operation prompts shown on the pages (collectively, the "Agreement"), form the terms on which we provide the Trace service. They are indivisible, and you must comply with all of them.
Please read this Agreement in full, paying particular attention to the bold text.
If you have any question about this Agreement or about the information shown on the pages, do not proceed. By ticking your agreement or by using the Trace service, you are deemed to have read and agreed to be bound by this Agreement.
If you do not agree with any part of this Agreement, or cannot fully understand it, please stop using the App and do not carry out any further operation.
3.1 You must have full civil capacity to use the Trace service. If you are a person without civil capacity or with limited civil capacity, please read this Agreement under the guidance of your guardian and use the Trace service only with that guardian's consent;
3.2 You expressly declare and warrant that you have sufficient legal rights or authority to enter into and perform this Agreement, and that entering into and performing it does not conflict with, nor result in breach of, any other agreement or arrangement you are bound by;
3.3 If your country or region excludes all or part of this Agreement, you must immediately stop using the Trace service; otherwise, continued use of the Trace service means you accept the related legal risks or liabilities.
Trace is an item management tool built around local storage, provided by us over the internet and on HarmonyOS devices. You can use the App to record, organise and manage the expiry of items. Its main features are:
(1) Item records: record an item's name, photo, quantity, unit, category, location, expiry date, notes, batches and more, with support for favourites, pinning, search, filtering and bulk actions;
(2) Places and categories: customise multi-level places (such as "Fridge – chiller"), categories, icons, units and reminder lead times;
(3) Expiry reminders: in-app reminder notifications for items with an expiry date, which can also be written to the system calendar and managed there;
(4) Data export and import: export all data as a backup file, or restore data from a backup file;
(5) Tap to share: share the item data you select with a recipient between devices that support tap-to-share;
(6) Huawei Account sign-in (optional): used only to identify you when submitting feedback; not signing in does not affect any of the local features above;
(7) Feedback (optional): send us problems and suggestions, and read our replies.
We may optimise and adjust the service content as versions are iterated. If an adjustment materially affects your rights, we will notify you through in-app prompts, an update to this Agreement, or other reasonable means.
5.1 Any action you take and any instruction you issue in the App using a Huawei Account is deemed to be made by you personally, and you are responsible for the outcome. If your account information is impersonated, stolen or used unlawfully as a result of your own actions, you bear the resulting risks and losses yourself;
5.2 When using item records and other features, please fill in and check item names, quantities, expiry dates and similar fields carefully, making sure they are true, accurate, complete and valid;
5.3 Please judge for yourself, based on the item's actual storage conditions and shelf life, set a reasonable expiry date and reminder lead time, and confirm that you want to use the expiry reminder service;
5.4 You acknowledge and agree that if, as a result of your own input errors (such as an incorrect expiry date), improper operation or incorrect selections, reminders do not work as expected or your data becomes disorganised, you must bear the consequences yourself.
6.1 We provide the service over the internet and telecommunications networks. Before you use features that require connectivity (Huawei Account sign-in, feedback), you should have some understanding of the risks that network services may involve.
6.2 If the Trace service fails, is interrupted or is delayed due to network faults, system inspection, maintenance or instability, hacker attacks, or technical adjustments or faults at the operator or the power utility, this is not a breach by us, but we will use reasonable efforts to restore normal service.
6.3 The item data you record is stored primarily on your own device. Local data may be lost as a result of device damage or loss, system reset, uninstalling the App, or a failed system backup restore. Please back up regularly using "Export data"; we are not liable for data loss caused by these circumstances.
6.4 The expiry reminder depends on system notification and calendar capabilities, and may be delayed or fail to be delivered because permissions have been revoked, system settings have changed, or the device is powered off. Expiry reminders are an aid only: whether an item has spoiled and whether it can still be used must be judged by you against the actual situation, and we are not liable for any loss you incur by relying on the reminder function.
6.5 For data you actively transfer using data export or tap-to-share, please confirm the content and the recipient before proceeding. You and the recipient are responsible for safeguarding backup files and shared content; please do not share backup files containing sensitive information with untrusted third parties.
6.6 We provide the service as is. To the extent permitted by law, we are not liable for service interruption, delay or obstruction arising from: (1) damage caused by computer viruses, trojans or other malicious programs, or by hacker attacks; (2) faults in your device software, system, hardware, network or communication lines; (3) improper operation on your part; (4) any other circumstances beyond our control or reasonably foreseeable.
When using the App you must comply with laws and regulations, and must not engage in unlawful activity in any input area, including item names, notes, places, categories, icons and feedback content, including but not limited to:
(1) publishing, transmitting, disseminating or storing content that endangers national security or unity, disrupts social stability, violates public order and morals, or is insulting, defamatory, obscene, violent, or otherwise contrary to any law or regulation of the country;
(2) publishing, transmitting or disseminating content that infringes others' intellectual property, trade secrets or other lawful rights and interests;
(3) knowingly fabricating facts, or concealing the truth, in order to mislead or deceive others;
(4) publishing, transmitting or disseminating advertising and spam;
(5) any other conduct prohibited by laws and regulations.
If your breach of this clause causes loss to any third party, you shall bear sole responsibility for it; if we suffer loss as a result, you shall also indemnify us.
We may amend the terms of this Agreement when necessary; you can view the current terms in the latest version of the App.
Once published, the amended terms replace the original terms, and we will publish changes to this Agreement on the service pages promptly. If an amendment will seriously affect you, or substantially restrict your access to or use of the service, we will notify you a reasonable time before the change takes effect. For amendments made in order to meet security, legal or regulatory requirements, we may not be able to give the advance notice described above, but we will notify you as soon as possible.
If, after these terms are amended, you do not accept the amended Agreement, please stop using the service immediately; if you continue to access or use the service, you are deemed to have accepted the amended Agreement.
The conclusion, performance, interpretation and resolution of disputes under this Agreement are governed by the laws of the People's Republic of China.
You agree that the place of conclusion of this Agreement is Shenzhen, Guangdong Province, China.
Any dispute arising in the course of performance shall be resolved through consultation; if consultation fails, both parties shall bring the matter before a people's court with jurisdiction at the place of conclusion.
If you have any question about this Agreement, you may contact us via "Mine – Feedback" in the App, or by email to: solitude@hraulein.com. We normally reply within fifteen working days.