Cantera Support Privacy
iPhone · iPad · on device

Ideas don't wait.
This one caught it.

The good ones show up while you're deep in something else, and they're gone before you find somewhere to put them. Cantera is where they land — and it files them for you.

Download on the App Store Free · Pro $14.99 once
↑ sorted on device, in about a second

It lands as a task.

You didn't pick that. Share a screenshot, a link or a snippet straight from any app, point the camera at a whiteboard, or ask Siri — and Cantera decides what it is on the way in.

From anywhere

The share sheet, the camera, Siri, Shortcuts and a widget. Whatever you were already doing, Cantera is one tap away from it.

Filed without you

Task, idea or reference — decided on device, tagged on its own, with dates pulled out of plain language. A small model trained on development and design vocabulary, shipped inside the app.

Code stays code

Paste a snippet and it's treated as one: straight quotes, no autocorrect, no wrapping. Stack traces scroll sideways instead of turning into soup.

Thread 0 Crashed: 0 Cantera 0x1a4 IdeaStore.save() 1 Cantera 0x0f2 Capture.commit()

See what you circle

A review screen for what slipped, and a map of notes that resemble each other — so you stop saving the same thought five times.

Screenshots stop being dead ends.

Cantera reads the text inside every image, on your device. That folder of forgotten captures becomes something you can actually search — months later, by the words that were on the screen.

🔍 command
Superhuman onboarding with shortcuts
↳ found in an image · "Press ⌘K for the command bar"

Nothing you write ever leaves.

Cantera contains no third-party code of any kind and makes no network requests of its own. Your notes live on your device, the text in your images is read right there, and everything exports as plain Markdown whenever you want it somewhere else.

Free

forever — not a trial
  • Unlimited notes, projects and tags
  • Share extension, camera capture, Siri and widgets
  • On-device text recognition in images
  • Automatic sorting, tagging and date detection
  • Search, reference board, review, related map
  • Markdown export, Shortcuts, Face ID lock

Cantera Pro

$14.99 once — no subscription
  • Sync across your devices through your own private iCloud
  • A live folder of Markdown files your Mac can read
  • Everything in Free, unchanged and still free