Optaxis China Edition Terms of Service

Updated: September 24, 2026 · Effective: September 24, 2026

These terms are available in Simplified Chinese, Traditional Chinese, English and Japanese. If the versions differ, the Simplified Chinese version prevails.

Before registering for or using the App, please read these terms carefully and make sure you understand them, especially the provisions in bold that exclude or limit liability and those on governing law and dispute resolution. By ticking your agreement and completing registration, or by actually using the App, you confirm that you have read, understood and accepted these terms. If you are under 18, please read these terms under the guidance of a parent or other guardian. If you have any questions about these terms, contact us as set out in Section 13.

1. Parties and the service

These terms are an agreement between you and Ningbo Optaxis Digital Technology Co., Ltd. (宁波光轴数字技术有限公司, "we" or "us") on your use of Optaxis China Edition (the "App"). The Privacy Policy forms an integral part of these terms.

• Photography tools: calculation and support tools such as Scheimpflug tilt, depth of field and hyperfocal distance, shift correction, focal length and angle of view, metering and zone exposure, ND filters and reciprocity, astro and Milky Way planning, weather and sky information, and film development and darkroom timing.
• Records and management: shooting logs, shooting plans, film records, Recce (formerly Video Scout), equipment library and comparison (including aggregate purchase-price figures), client management (Pro), plus cloud sync, cloud backup and reminders.

The China edition does not offer content publishing, social interaction or instant messaging.

2. Accounts

• You must be at least 14 to register. If you are 14 to 17, you should use the App under the guidance of a parent or other guardian, and must obtain a guardian's consent before buying a Pro subscription.
• You can sign in with WeChat or Alipay, and on iOS also with "Sign in with Apple". The calculation tools can be used without signing in. If you have an account in Optaxis overseas edition, you can move your data into your account in the App with a one-time migration code, as described in the Privacy Policy.
• Your account is for your use only and may not be lent, transferred or sold. You are responsible for keeping the WeChat, Alipay or Apple account you sign in with secure; consequences of your account being used by others for reasons attributable to you are yours to bear, except where we are at fault.

3. Paid services and virtual benefits

• The App's basic tools are free. The iOS version offers a Pro membership subscription; the price, period and free trial are as shown on the App Store purchase page. The subscription renews automatically: when the free trial ends it becomes a paid subscription, and unless you turn off auto-renewal at least 24 hours before the end of the current period, it renews at the price and period shown at purchase. At least five days before a free trial ends and before each automatic renewal, we will remind you prominently, by push notification, an in-app pop-up or similar, of the charge date, the amount and how to cancel; you can also check the next charge date and amount at any time under "Me → Membership" in the App. You can cancel at any time on your iPhone under "Settings → Apple Account → Subscriptions". Charges and refunds are handled by Apple under App Store rules, without prejudice to your statutory rights; contact us if you need help. The Android version currently offers no paid purchases.
• Light Points are virtual points within the App that can be exchanged for specified benefits under the rules published in the App. Light Points have no monetary value, cannot be exchanged for cash and cannot be transferred. Rules for invitation rewards and similar activities are as published on the activity page. We may deduct or cancel Light Points and rewards obtained by cheating, bulk registration or other improper means. If you disagree with a deduction or cancellation, you can appeal as set out in Section 6 and we will review it manually.
• Closing your account does not cancel your App Store subscription; please first turn off auto-renewal under "Settings → Apple Account → Subscriptions", or Apple may continue to charge you. When your account is closed, your Light Points, invitation rewards and any unexpired membership benefits are cleared and cannot be restored.

4. Your data

The materials you create in the App (avatar, nickname, shooting logs, equipment library, film records, shooting plans, client data, cloud backup files and so on) belong to you. To provide cloud sync and backup, you grant us permission to store and transmit them to the extent needed to run the service; the permission ends when you delete the materials or close your account (deleted cloud backups stay in the recycle bin for 30 days; copies in database backups are overwritten when the backup cycle expires, as set out under "How long" in the Privacy Policy, and until then are only stored).

When you enter information about other people, such as client data, you must have their consent or another lawful basis; you decide who receives any read-only viewing link you create, and you can revoke it in the App at any time.

5. Acceptable use

When using the App you must not:

• use the App for any activity that breaks the law or infringes the lawful rights of others (including processing other people's personal information without consent);
• use the App to store or disseminate information prohibited by law;
• interfere with the normal operation of the service, or attack, overload or probe our servers;
• reverse-engineer, decompile or crack the App, or distribute a modified client.

For breaches of these terms we may, depending on the circumstances, give a warning, restrict some features, or suspend or terminate the service; the measures and how to appeal are set out in Section 6.

6. Automated access and enforcement

The following rules apply to programmatic access to the App or our servers.

Programmatic access we have authorised in writing is not restricted by this section.

• You must not use automated programs or scripts to register accounts or to operate an account in place of a real person;
• You must not use crawlers, scripts, unofficial clients or any other unauthorised means to access, copy, store or redistribute the App's data in bulk (such as the equipment database or weather and sky data);
• You must not circumvent, or attempt to circumvent, technical measures such as sign-in requirements, rate limits, human verification or client checks;
• We currently offer no open data interface to third parties; any third-party service claiming access to the App's data is not authorised by us.

For breaches of Section 5 or this section, we will take the following measures according to severity:

• Warning: for isolated incidents, via an in-app notice;
• Restriction: for repeated or combined breaches, limiting request rates or suspending some features;
• Termination: where an account is operated entirely by automated programs, used to harvest data in bulk or to circumvent technical measures, we terminate its use.

In urgent or serious cases we may act first and notify you afterwards. We reserve the right to pursue legal liability. If you believe a measure was applied in error, you can appeal through in-app feedback or support@optaxis.cn; we will review it manually and reply within fifteen working days.

7. Intellectual property

The intellectual property in the App's software, interface design, icons, text, databases and brand marks belongs to us or the relevant rights holders. Without written permission you may not copy, modify, distribute or commercially exploit them. ALPA is a registered trademark of ALPA Capaul & Weber Ltd; the App is a third-party tool and is not affiliated with ALPA.

8. Personal information

We collect, use, store and protect your personal information in accordance with the Privacy Policy.

9. Disclaimers and limitation of liability

• The App's calculations and weather and sky information are for photographic reference only and may be inaccurate because of data sources, devices or conditions. Do not rely on them as the sole basis for decisions affecting personal safety (for example in the wilderness, at high altitude or around coastal tides).
• Weather data is provided by QWeather and place data by Amap; maps are provided by Amap on Android and by Apple Maps on iOS.
• Weather and light windows are calculated from your coordinates: they are sent to our servers to fetch local data, and if you turn on weather notifications they are saved to your account at about 1 km precision. See the Privacy Policy for details.
• Where the service is interrupted or data is delayed because of force majeure, telecommunications or network failures, failures of third-party services or necessary system maintenance (we announce planned maintenance in advance), we will do our best to limit the impact but, to the extent permitted by law, are not liable. Please keep your own backup of important data.
• These disclaimers do not apply to property loss caused by our intent or gross negligence, or to personal injury.

10. Changes, suspension and termination

We may adjust, suspend or discontinue some features as the business develops; we will give you reasonable advance notice of significant changes that affect your main rights. You can stop using the App and close your account at any time. If we change or discontinue Pro features in a way that affects benefits you have paid for, we will help you request a refund under App Store rules or provide equivalent compensation for the remaining period.

11. Changes to these terms

We may amend these terms from time to time. Amended terms will be published in the App, and we will notify you prominently, such as with a pop-up, of significant amendments that affect your main rights. If you do not agree to the amended terms, you can stop using the App and close your account; if you continue to use the App after an amendment takes effect, you are deemed to accept the amended terms.

12. Governing law and disputes

The formation, validity, interpretation, performance and dispute resolution of these terms are governed by the laws of mainland China. Any dispute arising from these terms shall be settled through friendly negotiation; failing that, either party may bring a lawsuit before the people's court with jurisdiction at the defendant's domicile.

13. Contact us

If you have any questions, feedback or complaints about these terms, please contact us; we will reply within fifteen working days:

Email: support@optaxis.cn

Operator: Ningbo Optaxis Digital Technology Co., Ltd. (宁波光轴数字技术有限公司; unified social credit code 91330212MAKMFWQT5T), Yinzhou District, Ningbo, Zhejiang, China.