Grandmaster Flash

Language learning · Your own material

Create with your assistant.
Practise at your pace.

Grandmaster Flash is a spaced repetition app for the words and phrases you actually want to learn.

Ask Claude or ChatGPT to create a deck with translations, examples, and audio. Then study it on your phone or tablet, including offline.

Connect your assistantHow it works

The iOS app is in TestFlight preparation. Public downloads aren’t available yet. Contact us about access.

Grandmaster Flash on iPhone: a private library grouped into Arabic, French, and Japanese decks
Your library, on iPhone.

From an idea to a study session

Make the material yours.

  1. 01 · Create

    Tell your assistant what you need.

    A conversation you’re preparing for, phrases from a lesson, or vocabulary from something you’ve read. Your assistant builds and saves the deck.

  2. 02 · Review

    Check the content before learning it.

    Ask for useful examples, pronunciation notes, and audio. Check translations and generated content with a teacher or a reliable source.

  3. 03 · Practise

    Open the app and study.

    Sync your library, choose a deck, and work through the cards due for review. Mark what you remembered; the next review is scheduled for you.

Who it’s for

Learners building a useful vocabulary.

This is for people who want personal study material: learners working with a tutor, preparing for travel, reading in another language, or keeping up several languages.

You choose what belongs in your decks. Creation and editing happen in your assistant; the mobile app keeps the focus on practice.

Four ways to practise
Reading, listening, writing, and speaking have independent schedules. Writing and speaking are self-assessed.
Audio, when you need it
Ask your assistant to generate audio or attach supplied recordings. Download audio before studying offline.
Offline study, synced progress
Downloaded decks and audio work without a connection. Your reviews sync when you reconnect.
A private, manageable library
Flag cards to revisit with your assistant, suspend practice, archive decks, or confirm permanent deletion.

Room for your languages

The same library, on a larger screen.

Browse your decks on a tablet, with the same account and practice history.

The Grandmaster Flash library on a 13-inch iPad, with Arabic, French, and Japanese example decks
Actual app captures from the TestFlight screenshot set.

Start with a connection

One account, in your app and assistant.

Connect Grandmaster Flash in Claude or an eligible ChatGPT workspace. Sign in with the same email you use in the app.

Read the connection guide