Cirello
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Notes on memory,
spaced repetition, and what we're building.

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Introducing Cirello MCP: your flashcards, inside your AI assistant

Cirello now has a remote MCP server. Connect Claude, ChatGPT or Cursor, choose the permissions, and let an assistant build decks and tidy your library.

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October 11, 2026 · 5 min read

How-toHow to memorize vocabulary in a new language

Words in context, one meaning per card, recall in both directions, and a daily routine small enough to survive a busy week.

October 10, 2026 · 6 min read

How-toHow to write good flashcards

The minimum-information principle and a handful of habits that make cards faster to review and easier to remember.

October 8, 2026 · 6 min read

How-toHow many flashcards should you review per day?

New cards per day, reviews per day, and why the real number to watch is the workload you will still be doing in a month.

October 6, 2026 · 6 min read

Memory scienceThe Leitner system explained

Boxes, cards and a simple promote-or-demote rule. How the paper-era scheduler works, where it shines, and where it runs out of road.

October 3, 2026 · 6 min read

Memory scienceActive recall vs spaced repetition: not the same thing

One is what you do during a review, the other is when you do it. Why the combination is what makes studying stick.

October 1, 2026 · 6 min read

Memory scienceDesired retention in FSRS, explained

The one dial that trades review workload against how much you remember - what 90% actually means and how to think about changing it.

September 28, 2026 · 6 min read

Memory scienceFSRS vs SM-2: what actually differs

Two spaced-repetition schedulers, two different ideas about memory. Intervals vs a per-card model, and what that changes in practice.

September 25, 2026 · 7 min read

ProductCirello's beta pricing: free now, what changes later

Free today, no card required - and the plan for a subscription down the road that keeps the project sustainable.

September 22, 2026 · 2 min read

ProductWhat Cirello can and can't do today

A plain capability list: what's live, what's in progress, and what's explicitly not built yet.

September 19, 2026 · 3 min read

ProductInside Cirello's FSRS-6 pipeline

What gets retrained every night, why, and what it means for review accuracy over time.

September 15, 2026 · 2 min read

How-toA calmer way to study dense material

For medicine, law, and engineering - the backlog-anxiety problem specifically, and frictionless capture for source-heavy material.

September 3, 2026 · 3 min read

How-toBulk-importing flashcards without building a deck one at a time

Paste a list, get a deck. Why one-card-at-a-time creation is where most people quit before they start.

August 20, 2026 · 3 min read

How-toHow to turn book highlights into spaced-repetition cards

Why retyping highlights kills the habit before it starts, and reviewing straight from the source instead.

August 13, 2026 · 3 min read

Memory scienceThe forgetting curve: how fast you actually forget

Ebbinghaus's original curve, why it still holds up, and the one proven counter to it.

August 6, 2026 · 7 min read

Memory scienceHow to actually remember what you read, not just highlight it

Highlighting feels productive. It isn't retention. The gap between capturing a passage and ever seeing it again.

July 30, 2026 · 7 min read

Memory scienceWhat is FSRS, and how is it different from a fixed schedule?

Why a per-card, nightly-retrained model beats a table of fixed intervals - and how Cirello uses FSRS-6 specifically.

July 16, 2026 · 8 min read

Memory scienceWhat is spaced repetition, and why does it work?

The forgetting curve, why cramming loses to spaced review, and what changed once scheduling itself got smarter.

July 2, 2026 · 7 min read

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