Local-first. Designed for meetings & classes.

Stop screenshotting mid-meeting.
Let CUSTRA capture the key frames.

Select a region inside Zoom / Teams / Tencent Meeting / live streams (slides, subtitles, chat). CUSTRA samples every second, automatically stores changes — with an optional loop capture as a safety net.

ZoomTeamsTencent MeetingOnline coursesLive streamsWeb BrowserLocal video player

Beta opens in 20 days

Join the CUSTRA waitlist

Leave your name and email. We’ll send you the download link and setup guide when the beta is ready.

No more busy taking screenshots

In meetings and courses, the pain isn’t “lack of content” — it’s missing the moment. When you stop to screenshot, you stop to listen. CUSTRA captures the key frames so you can stay engaged.

Fewer junk screenshots

Save only the important changes.

Faster review

A timeline of images is easier to skim than a long recording.

Audio sync

Record audio while capturing the important moments.

Local privacy

No account, no upload, your files stay yours.

Before vs after

What changes with CUSTRA

Side‑by‑side, the difference is simple: fewer interruptions while listening, and cleaner outputs when you review.

Without CUSTRA

❌ Pause to screenshot
❌ Miss a sentence / a step
❌ Hundreds of unsorted images
❌ Hard to find “that slide” later

With CUSTRA

✅ Select once, keep listening
✅ Only key changes saved
✅ Clean, time‑stamped output folder
✅ Easier to align with your notes

No upload, No Saas

CUSTRA runs locally and saves outputs to your computer. No account required. No upload. Your files stay in your control.No subscription, one-time purchase.

Who it’s for

Students

Capture key slide pages and worked examples from online courses.

Professionals

Save the important moments from reviews, trainings, and demos.

Creators

Collect key frames from live sessions for editing and notes.

TAs & instructors

Quickly locate “that slide” when answering questions later.

Researchers

Organize screenshots into a clean timeline for analysis.

Remote teams

Keep a lightweight visual record without heavy screen recordings.

Feature highlights

Minimal workflow

Start → select region → stop. Results are ready in a folder.

Change-trigger saving

Better signal-to-noise than manual screenshots or raw screen recording.

Optional loop fallback

Save every N seconds if you want a safety net for subtle changes.

Timestamped outputs

Easy to align with your notes and recall the moment later.

Local-first privacy

No account required. Outputs stay on your computer by default.

Windows system audio

Optional audio capture to replay the important parts.

🙋 FAQ

Common questions about CUSTRA.

💻 Does it support macOS and Linux?: The current demo is Windows-only. We may add macOS and Linux support later.
🎬 Is this screen recording?: No. It samples every second and saves key change frames as PNGs. You can also turn on loop capture as a fallback.
❓ Why not just record the screen?: For most meetings and classes you only need the key slides and switches, not a long video. Key frames are easier to search and better for notes.
📁 Where are files saved?: Locally: output/<task>/images/*.png. If you enable audio (Windows), you get output/<task>/audio/audio.wav.
☁️ Does it upload to the cloud?: No. It runs and saves everything on your machine.

Ready to stop missing key slides?

Join the waitlist to get early access and help shape the beta.

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