Flashcards you actually want to open.

Build decks for anything you're learning — definitions, formulas, vocabulary, code — and let smart review bring back the ones you keep missing.

Download on the App Store Free · iPhone and iPad · iOS 18 or later

What it does

No account, no subscription trap, no syncing your notes to somebody's server.

🧠

Cards you miss and cards you haven't seen in a while come back first.

📝

Basic cards, question and answer, definitions, formulas, images and code with syntax highlighting.

🎨

A dozen app themes and fifteen card styles. Pick a default and every card follows it.

🔥

A study streak with rewards, plus Home Screen and Lock Screen widgets.

🔄

Export a collection to a file and send it to a classmate.

🔒

Your cards live on your device. No account, no analytics, no tracking.

Tap to reveal, swipe to move on.

Happening now

Two haunted app themes and three spooky card styles, free for everyone from 1 September to 3 November 2026.

StackCards is free and stays useful for free. Premium is a single purchase.

Do I need an account?

No. There is no sign up and no login.

Where are my cards stored?

On your device.

Is Premium a subscription?

No. It is a one time purchase.

What happens to event packs if I delete the app?

Claimed packs are recorded in your iCloud account.

Which languages does it speak?

Eleven languages.