Last updated: 2026.9.12 · 简体中文
Welcome to eAbacus. This User Agreement (this "Agreement") is entered into between you and Weigan Technology (Shenzhen) Co., Ltd. (hereinafter referred to as "we," "us," or "our") and governs your download, installation, access to, and use of the eAbacus application and related services (the "Service") on iOS, iPadOS, and macOS.
Please read this Agreement carefully before using the Service, especially provisions concerning disclaimers, limitation of liability, dispute resolution, and governing law. By tapping Agree, installing the app, or otherwise using the Service, you acknowledge that you have read, understood, and agree to be bound by this Agreement. If you do not agree, do not use the Service.
This Agreement works together with our Privacy Policy for eAbacus. Rules for personal information processing are set out in the Privacy Policy.
1.1 eAbacus is an electronic abacus and mental-arithmetic practice education tool. Features may include, without limitation: interactive bead dialing and reading display; rod count and units-marker settings; mnemonic and lesson teaching; timed practice/exams; history save and review; sound and haptics; generating and sharing abacus images; and optional local-network Mac podium mirroring. Available features depend on your app version, device, and operating system. We may update, adjust, or discontinue features from time to time.
1.2 Core features are currently free for all users. We do not apply ad-based or daily-quota paywalls, and we do not offer in-app purchases or subscriptions. If a future version introduces paid features or advertising, we will update this Agreement and the Privacy Policy as required by law and obtain your consent where necessary.
1.3 The Service does not require you to create an in-app account operated by us. Board state, practice and exam records, teaching progress, and settings are stored primarily on your device. We do not provide cloud account sync operated by us. Local-network podium mirroring transmits the current display between the relevant devices after you grant local-network access and a connection is established.
1.4 Features may differ by operating system, for example:
1.5 The Service currently does not integrate third-party advertising SDKs, and we do not use ads to unlock core features.
2.1 You must have the legal capacity to enter into this Agreement. If you are a minor, please read this Agreement with your guardian and use the Service only with guardian consent.
2.2 You understand that the Service is intended for personal learning, teaching demonstration, and abacus practice. You must not use the Service in any manner that violates applicable laws, platform rules, or the lawful rights of others.
2.3 You must not use the Service to:
2.4 You are responsible for practice records, shared images, and other content generated or stored locally through the Service. You bear all complaints, claims, penalties, and losses arising from your violation of law, this Agreement, or third-party rights, and you will indemnify us for losses we suffer as a result.
2.5 We may restrict features, suspend, or terminate access where reasonably necessary to maintain security, comply with law, or cooperate with regulators, and we may report suspected unlawful conduct to competent authorities.
3.1 The software, interface design, icons, documentation, trademarks, default teaching content, and other content in the Service are owned by us or relevant rights holders. Except as required by law or expressly authorized in writing by us, you may not copy, modify, distribute, rent, sell, or create derivative works from them.
3.2 Rights in practice records, exam scores, shared images, and other content you generate through the Service are determined by your relationship with applicable law. Except for network transfers you actively initiate (such as local-network mirroring, update checks, or system sharing), such data is processed mainly on your device. You grant us a limited, non-exclusive, revocable license to use such data only as necessary to provide, maintain, and improve the Service on your device. We do not claim ownership of your data on that basis, and we do not use your data for purposes unrelated to the Service.
4.1 The current version does not offer in-app purchases, subscriptions, or other paid unlocks. When the Service is distributed through the Apple App Store, download and use remain subject to Apple and related platform rules.
4.2 If a future version introduces paid content, products, prices, and benefit scope will be as shown in the app. Payment flows will be handled by the relevant app store; we will not collect or store your full payment card numbers or other sensitive payment credentials.
5.1 The Service relies mainly on operating-system and app-store capabilities for storage, networking, local network, sharing, and UI, and may use Apple update-lookup and review-prompt capabilities. Third parties process information under their own privacy policies and terms. For details, see our Privacy Policy for eAbacus.
5.2 We do not guarantee the accuracy, legality, or availability of third-party products, services, platform policies, or content. Disputes between you and third parties must be resolved by you. We are not liable, to the extent permitted by law, for partial feature unavailability caused by third-party service changes, outages, or restrictions.
6.1 You understand that bead operations, clearing the board, saving or deleting history, and local-network mirroring may be irreversible or may fail, and can cause progress loss, display interruption, or data corruption. Confirm before important operations and ensure sufficient device storage and network conditions. Except where we act with intent or gross negligence, you assume risks and losses arising from such operations.
6.2 Local-network podium mirroring depends on device discovery and connection on the same local network and may be affected by router settings, system permissions, firewalls, device sleep, or network instability. Mirroring traffic stays on your local network environment; use this feature only on networks you trust. We do not warrant that mirroring will always be available, latency-free, usable across networks, or secure on untrusted networks.
6.3 The Service is provided on an "as is" and "as available" basis. We use reasonable efforts to keep the Service stable but do not warrant uninterrupted, error-free, fully secure, or permanently compatible operation with any particular device model or operating-system version. Feature availability may vary across devices and OS versions.
6.4 To the extent permitted by law, we are not liable for interruption or data loss caused by force majeure, carrier or network failures, device failures, third-party service outages, cyberattacks, government action, or other causes beyond our reasonable control.
6.5 Teaching content, mnemonic explanations, and external links are for learning reference only and do not constitute a professional education or exam-coaching commitment. You must independently evaluate use in your own context.
7.1 To the maximum extent permitted by applicable law, we and our affiliates, directors, employees, and agents are not liable for any indirect, incidental, special, punitive, or consequential damages arising from use of or inability to use the Service, including loss of profits, goodwill, data, or business interruption, even if we have been advised of the possibility of such damages.
7.2 Except where mandatory law provides otherwise, our total aggregate liability to you for all claims arising from the Service is limited to the amount you actually paid through Apple official channels for the paid Service giving rise to the claim in the twelve (12) months before the claim arose; if you did not purchase paid Services, the limit is one hundred (100) CNY.
8.1 We may revise this Agreement from time to time and publish updates in the app, on our website, or by other reasonable means. Revisions take effect on publication or on the effective date stated in the notice. If you do not agree, stop using the Service; continued use constitutes acceptance.
8.2 We may change, suspend, or terminate all or part of the Service for business, legal, or operational reasons and will provide reasonable advance notice where practicable, unless law or regulators require otherwise.
8.3 You may stop using the Service at any time, including by uninstalling the app. If you materially breach this Agreement, we may restrict or terminate access without prior notice and pursue remedies under law.
8.4 Upon termination, your right to use the Service ends immediately. Provisions that by nature should survive (such as intellectual property, disclaimers, limitation of liability, and dispute resolution) remain in effect.
9.1 This Agreement is governed by the laws of the mainland of the People's Republic of China, excluding conflict-of-law rules.
9.2 Any dispute arising from or relating to this Agreement or the Service shall first be resolved through friendly negotiation. If negotiation fails, either party may bring suit in a court of competent jurisdiction at the domicile of Weigan Technology (Shenzhen) Co., Ltd.
10.1 Section headings are for convenience only and do not affect interpretation.
10.2 If any provision is held invalid or unenforceable, the remaining provisions remain in full force and effect.
10.3 Our failure or delay in exercising any right under this Agreement does not constitute a waiver.
10.4 If you have questions about this Agreement, contact us at:
Email: weigantechnology@outlook.com