Anki vs RemNote vs Mochi vs SuperMemo: The 2026 Spaced Repetition Showdown

Every few weeks someone asks me the same thing: "I've decided to take spaced repetition seriously — do I use Anki, RemNote, Mochi, or SuperMemo?" It's the right question and an annoying one, because the honest answer is "it depends on how you study," and nobody likes that answer. So this is me actually answering it. I've used all four with real material, and below is the unsentimental breakdown of where each one wins and where it'll waste your time.

TL;DR Anki is the default for a reason — adaptive SM-2 (and now FSRS) scheduling, the biggest shared-deck library on earth, and it scales to 10,000+ cards. The cost is a dated UI and manual card authoring. RemNote is for academics who live in PDFs and want flashcards embedded inside their notes. Mochi is the "Anki but pleasant" option: clean markdown, nice design, smaller ecosystem. SuperMemo is the algorithm purist's choice — SM-18 and incremental reading are unmatched, but the Windows-era UX is a wall. If card creation is the friction stopping you, none of these solve it well — that's the gap SmartRecall was built for.

How I evaluated them

I ran the same material through all four for three weeks: ~600 Spanish vocabulary items, a technical book chapter, and a pile of facts scraped from articles. I scored each tool on six dimensions that actually decide whether you keep using it:

1. Scheduling algorithm — what runs under the hood and how well it spaces reviews
2. Card creation speed — source material to reviewable card
3. Note / workflow integration — does the SRS feel native or bolted on
4. Mobile experience — can you review on a phone without rage-quitting
5. Ecosystem — shared decks, add-ons, community
6. Pricing reality — what you actually pay for what you'll use

The comparison table

Anki — the default that earned it

Anki is what everyone compares everything else to, and that's fair. It runs adaptive scheduling per card (classic SM-2, and modern FSRS if you flip it on), syncs across every platform via AnkiWeb, and has a shared-deck library and add-on ecosystem nothing else comes close to. If a deck exists for your exam — IELTS, USMLE Step 1, the JLPT — it's on Anki first. I keep an IELTS vocabulary deck running in it.

The cost is twofold: the interface looks like 2009, and you author every card by hand unless you import someone else's. For a deeper algorithm-level look at how Anki's scheduler compares to the alternatives, I wrote SM-2 vs FSRS vs Leitner vs Anki.

Pick Anki if: you want maximum scale, shared decks, and don't mind a dated UI or manual authoring.

RemNote — flashcards that live inside your notes

RemNote's whole pitch is that your flashcards are your notes. You write in an outliner, tag bullets as cards with ::, and the SRS schedules them with FSRS. For grad students and med students who annotate PDFs all day, the integration is genuinely excellent — no context-switching between a note app and a card app. I detail the head-to-head in SmartRecall vs RemNote.

The downside is the learning curve — the outliner-plus-SRS mental model takes a week to click — and the cards are only as good as your note hierarchy.

Pick RemNote if: you're an academic, you live in PDFs, and you want notes and cards to be one thing.

Mochi — Anki, but pleasant

Mochi is what Anki would look like if it were redesigned in 2020: clean markdown editor, tidy design, Anki-style spaced repetition under the hood. It's a joy to use for personal decks and far less intimidating than Anki or SuperMemo. The trade-off is a small ecosystem — no giant shared-deck library, fewer add-ons — and you're still typing cards by hand. See SmartRecall vs Mochi for the detailed comparison.

Pick Mochi if: you want a beautiful, low-friction tool for decks you build yourself and don't need Anki's ecosystem.

SuperMemo — the algorithm purist's tool

SuperMemo is where spaced repetition was invented. Piotr Wozniak built SM-2 in 1987 and the algorithm has been iterating ever since — it's now on SM-18, the most sophisticated scheduler in existence. Its incremental-reading feature, which turns long articles into a continuous stream of cards, is genuinely unmatched. If you're learning a language from scratch or building a 10,000-card research deck, nothing schedules better. I tested it head-to-head in SmartRecall vs SuperMemo.

The catch is brutal UX. It's a Windows-era desktop app with a learning curve measured in weeks, and mobile is an afterthought. You adopt SuperMemo for the algorithm and tolerate everything else.

Pick SuperMemo if: you're a serious polyglot or researcher who will invest 10+ hours to master incremental reading.

The thing none of them solve: card creation

Here's what three weeks of testing made obvious. All four are scheduling tools — they decide when to show you a card. None of them meaningfully solve the part that actually stops people: making the cards. Anki, Mochi, and SuperMemo all expect you to type each card by hand; RemNote ties them to a notes workflow you have to commit to.

That's the gap SmartRecall was built for: paste text, upload a PDF, or use the browser extension, and AI generates a reviewable deck in 15–30 seconds, scheduled with FSRS, reviewable on mobile without setup. If you've bounced off Anki or SuperMemo because authoring cards felt like a second job, that's the friction we removed. You can even turn a PDF straight into flashcards.

Bottom line

• Maximum scale + shared decks → Anki
• Notes and cards as one thing → RemNote
• Clean, pleasant, build-your-own → Mochi
• Best-in-class algorithm, willing to suffer the UX → SuperMemo
• Skip the card-typing entirely → SmartRecall

The best spaced-repetition tool is the one you'll keep opening. Pick the one whose friction you can live with — or remove the friction entirely.