Terms of Use

1. Service Overview

Optaxis (the “App”) is a photography community and companion toolbox for medium format, large format, technical camera, 135 flagship and film photographers — “Where the optical axis meets community.”

Professional tools: Scheimpflug tilt, depth of field, hyperfocal, shift correction, focal length & angle of view (with stitch pano), built-in light meter, AR composition viewfinder (live B&W, RGB histogram, DoF overlay, Sun / Moon / Milky Way / 88 constellations / 120 deep-sky objects), ND filter, focus stacking, bellows extension compensation (LiDAR auto-ranging on supported devices), panorama planner, timelapse, astro & Milky Way (including 2026–2035 solar / lunar eclipse catalog), Moon / Sun trajectory, flash GN, print size, gear comparison (backs / bodies / lenses), shooting weather, FilmDev, Fujifilm film-simulation EXIF recognition, Personal EI calibration, darkroom timer, white balance.

Community: Post publishing (multi-image / hashtag feed / before-after), hashtag and Fujifilm film-simulation follow with aggregated feeds, following photographers, pinned post on profile, post context cards (linked shooting log / Kit / film roll / simulation chip with reverse index), photo-spot sharing (reviewed before publishing), map place layers (spots, dealers, labs, studios), photo challenges, daily inspiration, galleries & collections, brand verification badges, four-language tips articles & news, four-language translation. Posts and photo spots are reviewed before publishing and may be reported and removed.

Records: Shooting log (Film Mode, 12 fields, cloud sync), shoot plans (cloud sync, offline cache, WeatherKit forecast, gear checklist linkage, linked log entries).

By using the App, you agree to comply with these Terms of Use. If you do not agree, please stop using the App.

2. User Eligibility

You must be at least 13 years old to use the App. If you are under 18, please use it under the guidance of a parent or guardian.

3. Optaxis Pro

The App offers advanced “Optaxis Pro” features. Auto-renewable subscriptions are no longer sold to new users; you can unlock Pro in the following ways:

• Points: earn Points through activity in the app (posting, challenges, invites) and redeem them for time-limited Pro windows — no payment required.
• Lifetime Sponsorship: a one-time, non-consumable in-app purchase that permanently unlocks all Pro features.
• Welcome trial: new users receive 14 days of Pro upon registration.

Existing subscribers:

• Auto-renewable subscriptions (Monthly / Annual) are no longer offered to new users.
• If you subscribed previously, your subscription stays active and continues to auto-renew under its original terms; fees are charged to your Apple ID.
• Subscriptions auto-renew within 24 hours before the end of the current period.
• You can manage or cancel any time in iPhone Settings → Apple ID → Subscriptions.
• After cancellation, benefits remain until the end of the current period.

4. User Content & Intellectual Property

Content you publish through the App (photos, text, comments) is your personal creation. By publishing, you grant the App a non-exclusive license to display it within the platform.

Post editing: You may edit your published posts (title, description, photo, city, gear). Edited content replaces the original; edit history is recorded.

Publishing limits: Up to 80 MB per photo. Reasonable posting limits apply to prevent abuse.

Copyright: Photos uploaded to galleries, photo spots, or the map remain the copyright of the uploader. Optaxis claims no ownership. No user may download, copy, repost, or commercially use others’ uploads without explicit authorization.

Platform license: By publishing, you grant Optaxis a non-exclusive, royalty-free, revocable license to display, cache, and transmit your content within the platform — solely for platform operation. Deleting your content terminates the license.

You are responsible for what you publish and warrant that:

• you own the rights or have proper authorization;
• it does not infringe any third-party rights;
• for any identifiable people shown in your content, you have obtained their consent or have a lawful basis to capture and share their likeness;
• it contains no illegal, harmful, threatening, insulting, defamatory, or otherwise inappropriate material.

Infringement complaints: If you believe content infringes your copyright, contact us via the support page with evidence — we will review within a reasonable time.

5. Community Guidelines

When using the gallery, photo spots, comments, challenges and other community features, you must:

• respect others — no offensive, discriminatory or harassing content;
• no spam, ads or photography-unrelated content;
• no impersonation or false identity;
• no pornographic, violent or illegal content;
• no misuse of platform features to interfere with others;
• use in-app reporting and blocking if you encounter violations.

We reserve the right to remove violating content and ban violating users from community features without prior notice.

6. Follow System

• do not use follow for harassment (rapid follow/unfollow loops);
• do not use automation to bulk-follow for improper exposure;
• your follower and following counts are visible to others;
• followed users receive push notifications — please use respectfully.
• hashtag and Fujifilm film-simulation follow share the same rules — no automation or rapid follow / unfollow loops to manipulate aggregated feeds.

7. Intellectual Property

The App’s design, code, icons, brand identity and other content are protected by intellectual-property law. ALPA is a registered trademark of ALPA Capaul & Weber Ltd; this App is a third-party tool and is not directly affiliated with ALPA officially.

8. Disclaimer

• calculation results (Scheimpflug, focal-length conversion, etc.) are reference only — we are not liable for losses arising from their use;
• weather data is sourced from Apple WeatherKit — provided for shooting reference only, not guaranteed for absolute accuracy;
• map weather uses city-level location only — no precise coordinates are collected or shown;
• we are not responsible for content published by third-party users.

9. Service Changes & Termination

We reserve the right to modify, suspend or terminate any feature at any time. We assume no compensation liability for changes to free features. For paid subscribers, we will give advance notice of significant changes.

10. Amendments

We may update these Terms from time to time. Updated terms will be posted on this page with a revised “Last updated” date. Continued use of the App constitutes acceptance.

11. Contact Us

If you have questions about these Terms of Use, contact us at:

Email: support@optaxis.app

Operating entity: this app is currently operated by XIAO MIN NI as an individual developer; it will be updated to the registered company name and address once company registration is complete.