A calmer way to learn · mobile + PC

Study smarter.

Build a memory that lasts with a focused, beautifully simple flashcard space.

Download Serlo Build your memory ↗

Serlo flashcards on a laptop and phone beside study notes

Today72% retained

Made for curious minds · students · language learners · lifelong learners

BENEFITS

We’ve cracked the code.

Everything you need to turn review into a reliable habit.

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FSRS scheduling

Serlo uses FSRS to schedule reviews around your target retention, learning steps, and real recall history.

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Bring your Anki decks

Import .apkg decks with their cards, tags, HTML formatting, and supported media preserved.

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AI card studio

Turn pasted notes or a photographed page into editable flashcards before you save them.

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Cloud sync

Connect your account to keep your library backed up and available across devices.

ACTIVE RECALL

Answer first. Reveal second.

Active recall means trying to retrieve the answer before you see it. Swipe through the card or reveal the answer underneath.

Demo review · 1 of 20

BIOLOGY · DECK 01

What is active recall?

Active recall is the practice of retrieving information from memory instead of rereading it. That effort strengthens long-term retention.

← swipe to rate · or reveal below →

ONE LIBRARY, EVERYWHERE

Study on mobile. Go deeper on PC.

Capture a page with your phone, review on the train, then open the full Serlo workspace on your PC for editing, analytics, imports, and focused sessions. Your decks and progress stay in sync.

Mobile Scan pages and review anywhere.PC Import, edit, organize, and analyze.

Create your account

CLARITY, NOT NOISE

Know what to review next.

See how spaced repetition protects retention over time. When a curve falls below the 85% target, it is time to review.

See your analytics

Retention decay by deck stabilityLast 30 days

IMPORT + CREATE

Start anywhere.

Drop in an Anki .apkg deck, paste your notes, or photograph a page on mobile. Serlo turns your material into cards you can edit, review, and actually remember.

✓ Anki .apkg✓ CSV / JSON / Markdown✓ Notes to cards✓ Photo to cards

Open your library

Drop a deck here.apkg, .csv, .json, or .mdImport locally, then sync when you’re ready.

THE BIG PICTURE

Your library, in focus.

A clear home for every card and every small win.

01Spot patterns in seconds.
02Learn with less friction.
03Make progress visible.

Map your success.

Discover Serlo

Get started

Import your cards or make your first deck.

Make it yours

Shape your review rhythm around your life.

Keep growing

Show up, review, and watch memory compound.

Ready when you are.

Start with one card. Build a memory that lasts.