LCT · Lenscript · in development

What a photographcan't tell you

Where it was taken. When the sun went down. How thick the cloud was, and which rock everyone else stood on. The camera keeps none of it, and in a few months neither will you.

LCT is the platform behind Lenscript's photo apps, built to keep that information somewhere you can look it up before you go. It isn't open to the public yet.

Email me when it opens Use the apps that are live
Snow peaks and an alpine lake in Yading

Yading · Milk Lake28.38°N 100.33°E · 2026-09-22

Sunrise Sunset
Sunrise
07:07
Golden hour
18:45
Sunset
19:16
Blue hour
19:30–19:40
Pick another place and the times are worked out again in your browser for today's date, in China time (UTC+8), give or take two minutes. Treat them as a guide. Weather and air quality come in once the platform opens. Photo Izeberg007 · CC0
Ridge after ridge of alpine meadow on Wugong Mountain
Wugong Mountain · Summit27.47°N 114.17°EPhoto eldridge · CC0

A camera only records light

For each place, LCT keeps where it is, when it's worth shooting and how to get there. If a place isn't in the library, it says so.

Once the platform opens you'll see the weather and air quality in the same spot. When the community opens too, work from one location sits together, so you can tell where people stood and at what hour.

Live today

Each of these works on its own. None of them waits for LCT.

  1. Mark

    Live · free

    Reads the camera, lens and settings from your photo and prints them as a watermark or border. The photo stays in your browser.

    Open Mark

  2. Zlens

    Coming soon · one-time purchase

    Turns your phone into a second screen and a second set of dials for the camera. Works with Sony, Nikon, Canon and Fujifilm.

    Check camera support

  3. MuseFrame

    Live · 3 free on sign-up

    No prompt to write. Pick a style and the portrait keeps the person's face. Each one takes about two minutes.

    Open MuseFrame

Five layers underneath

All five are written and running in production. The community layer stays switched off in this release.

  1. L1

    Accounts

    Sign up with an email, sign in with a password. The server keeps only a derived hash, never the password itself.

    Deployed
  2. L2

    Community

    The backend is done. It's closed in this release, and there's no opening date yet.

    Off in this release
  3. L3

    Locations

    Places ship in signed packs, and a bad pack can be pulled as a whole.

    Deployed
  4. L4

    Weather and air

    Live, daily and air-quality feeds. When the upstream times out, a fallback catches it.

    Deployed
  5. L5

    AI assistant

    It only sees the text you type, never your photos, and it runs under an hourly and a daily quota.

    Deployed

How the backend is built

Questions

Opening dates, accounts, location data, and where your photos go.

What is LCT?

It's the shared platform behind Lenscript's photo apps. It handles shooting locations, weather and air quality, the photography community and an AI assistant. Accounts aren't shared: an LCT account is for LCT only, and Mark, Zlens and MuseFrame each have their own.

Do I need an account to use the products?

No. Mark works on your photos inside the browser, no sign-in needed. You'd only need an LCT account to save places or post in the community. You sign in with an email and a password, and the server never stores the password in plain text.

When does the photography community open?

There's no date yet. The backend is running in production, but places and posts are only starting to build up, and we'd rather not open an empty room. If you'd like a note when it opens, email donaldkuke@gmail.com with "LCT" in the subject and we'll write back once.

How are shooting locations verified?

Location data ships in whole packs. Each pack is signed by its publisher, the server checks the signature against a trust directory, and a bad release can be pulled as a unit. A place that isn't in the library comes back as unknown. Nothing gets made up by a model.

Are my photos used to train AI?

No. Mark never uploads your photos. Anything posted in the community is used only to show and moderate it, never to train models. If that ever changes, we'll ask for your consent first and update the privacy policy. The AI assistant calls an outside model and sends only the text you type, under hourly and daily quotas.

Which products use LCT?

Mark already uses LCT's content and location endpoints, and Zlens and MuseFrame are built on the same layer. They share location, weather and content data. Accounts stay separate.

Running, not open yet

The backend is live and already serves content and location data to Mark. Places and community posts are only just starting, and there's no opening date.

Email me when it opens

LCT Android app icon

Android beta

Comes with 37,000 shooting locations in China, and you sign up with an email. Builds go out through our Chinese-speaking QQ group (824558022). They're test-signed for trying things out and sending feedback, so please don't pass them around as a release.

Partnerships and API questions: donaldkuke@gmail.com. Chinese-speaking readers can scan the QQ code on the Chinese page. This page describes what LCT has deployed today. It isn't a promise of an opening date, a feature list or a service level, and interfaces may change before launch. Sunrise and sunset times use the NOAA solar-position formulas. Last updated .