Skip to main content

Beyond Anki: SRS Tools and Approaches Compared

Anki is the default spaced-repetition system (SRS) for Japanese, but it is not the only one. For some learners, it is not the right one. If you have hit Anki's friction points, such as its mobile experience, the effort of building decks, or the daily workload, the honest question is what else exists and how the alternatives differ.12

Overview: Why Look Past Anki at All​

The SRS apps besides Anki worth taking seriously do not differ mainly in scheduler quality. They differ in how cards get into the system and what each deck is optimized for.1234

This article covers five of them: JPDB, WaniKani, Mochi, Kitsun, and Migaku Memory. It lays them out in one comparison matrix, then names J-Compass's recommendation for the case the matrix leaves open: a learner who wants a clean, native, mobile-first SRS.

What "beyond Anki" actually means​

The spaced-repetition engine itself is largely a commodity. JPDB, Mochi, Kitsun, and Migaku all run a review loop built on the forgetting-curve principle. What differs is the content pipeline feeding it.1234

Card sourcing splits into four broad kinds. The key decision is which one matches your friction point.

  • Auto-mine from media. JPDB analyzes Japanese media and serves words from a title straight into review;56 Migaku turns subtitles and web text into cards.78
  • Curated fixed path. WaniKani teaches a fixed radical → kanji → vocabulary order, and you do not choose the cards.9
  • Community decks. Kitsun centers on shared, community-maintained decks.3
  • Do-it-yourself. Mochi is a clean card editor where you build your own cards.2

Scope differs too: general vocabulary (JPDB, Mochi, Kitsun), kanji-only by design (WaniKani),9 and video-based immersion (Migaku).7

The engine is not the differentiator

When comparing Anki alternatives for Japanese, resist judging them by scheduler marketing. The content model (auto-mine, curated, community, or DIY) and the platform matter far more than the algorithm name when deciding whether a tool fits your routine.

What stays the same no matter which tool you pick​

Every tool here implements spaced repetition: reviews scheduled to catch a card just before you forget it. JPDB states its algorithm is "centered around the concept of the forgetting curve," and the same forgetting-curve mechanism underlies the others.1

The daily work is identical across all of them. You still review your queue every day and grade each card honestly. The scheduler decides only when a card returns, not whether you show up.12

That shared mechanism, the forgetting curve and the grading loop, is general spaced-repetition theory. It is covered in depth in Spaced Repetition and the Forgetting Curve: Why Reviewing on a Schedule Works, so it is not re-derived here.

The Tools, One by One​

JPDB: auto-mining plus a built-in frequency database​

JPDB is a Japanese dictionary plus an all-in-one spaced-repetition system for vocabulary and kanji.15 Its defining feature is simple: it extracts vocabulary from real Japanese media and ships prebuilt, title-specific decks.

The landing page advertises "21434 prebuilt decks with vocabulary from 1399 different anime," plus decks for visual novels, light novels, and web novels. It also offers difficulty lists across anime, novels, and live-action content.5 Words can be added straight into review with context, drawing example sentences from a database of "over 130 million real Japanese sentences."5

On the JPDB-vs-Anki question, the scheduler is where people most often get the facts wrong. JPDB uses its own proprietary machine-learning scheduler. It is described as a "proprietary approach centered around the forgetting curve" that uses "machine learning along with gigabytes of real, historical SRS data" to predict retention.1 The landing page calls it "our own specialized spaced repetition algorithm," explicitly contrasted with SM-2.5

JPDB does not run FSRS

JPDB's scheduler is a custom, proprietary machine-learning algorithm. It is neither SM-2, Anki's older default scheduler, nor FSRS (Free Spaced Repetition Scheduler), so do not assume FSRS-style behavior or FSRS parameter tuning carries over. It is its own system, and you cannot tune it the way you tune Anki's FSRS weights.15

JPDB is web-based. There is no native mobile app; the FAQ says you can "add our website to your home screen and it will effectively work like an app."1 The core service is free with no artificial cap on daily card progress. Minor extra features are unlocked by supporting the Patreon, which starts at $5/month.106

Its strength is minimal deck-building: immersion-driven, frequency-ordered review with almost no setup. Its trade-offs are web-centric delivery with no native app1 and a proprietary algorithm you cannot tune.

WaniKani: a kanji-first SRS, not a general one​

WaniKani is a kanji and vocabulary SRS built on a fixed, mnemonic-driven progression: radicals (kanji components) → kanji → vocabulary. It is level-gated, so you unlock the next level by passing the current one.9 It is limited to kanji and the vocabulary that reinforces that kanji, in WaniKani's own order, with no custom mining or arbitrary deck import.9

This makes the WaniKani-vs-Anki comparison less about scheduling and more about scope. WaniKani is not a general flashcard tool you bend to any deck. Its radical-to-kanji-to-vocabulary mechanism is treated in full in J-Compass's dedicated WaniKani coverage rather than re-explained here.

The first 3 levels are free with no time limit. Level 4 onward requires a subscription.11 WaniKani quotes USD 9.00/month, USD 89.00/year, and a USD 299.00 one-time lifetime, with the lifetime tier periodically discounted on sale.1211

Its strength is structured, low-decision kanji study with built-in mnemonics. Its trade-off is that it does exactly one thing on one fixed path, behind a subscription.

Mochi: markdown-native, mobile-friendly flashcards​

Mochi is a spaced-repetition flashcard and note app whose cards are written in Markdown. It includes built-in multi-language dictionaries, text-to-speech, image search, and auto-translation.2 It runs on Mac, Windows, Linux, iOS, Android, and the web, making it one of the more genuinely cross-platform options here.213

A free tier offers unlimited offline use. The Pro tier (around $5/month, with a discounted yearly option) adds cross-device sync, deck publishing, dynamic fields, AI integration, and email support.2 For card sourcing, the model is build-your-own: deck publishing exists on Pro, but there is no community-deck portal.2

Mochi's FSRS support is reported, not vendor-confirmed here

Secondary coverage indicates Mochi added FSRS scheduling and can import Anki decks. This is attested through its App Store listing rather than stated plainly on its own landing copy.13 Treat it as FSRS-style modern scheduling pending confirmation on Mochi's own documentation.

Mochi's strength is a clean, low-friction mobile editor with fast note-to-card creation. Its trade-off is that you supply the content yourself.

Kitsun: community decks and a shared improvement loop​

Kitsun is a subscription web SRS platform centered on a community-deck system. It is supported by card-generating tools, a built-in reader, Subs2Kitsun, and dictionaries, and it lets you study multiple subjects at once.143 It remains active, with a live site and current pricing.14315

Pricing is USD 8.00/month, USD 64.99/year (about USD 5.42/month), and a USD 199.00 lifetime.14 Curated shared decks, such as large Core-style decks, give a faster start than building from scratch. Author-accepted suggestions propagate to every subscriber.3

Treat a Kitsun free trial as unconfirmed

Some secondary snippets mention a 14-day free trial, but Kitsun's own pricing page does not state one. Do not count on a trial unless you confirm it on Kitsun's site directly.

Its strength is the curated, community-maintained deck ecosystem. Its trade-offs are the subscription and a smaller ecosystem than Anki's, one that depends on continued community upkeep.

Migaku Memory: SRS welded to immersion​

Migaku is a browser extension plus companion iOS and Android apps that overlay video (Netflix, YouTube, and other browser video) and web text with interactive subtitles. Clicking a word shows a definition and saves the sentence as a flashcard for review in Migaku's SRS. The product spans 11+ languages, including Japanese.78

"Migaku Memory" is the SRS component. It is served at study.migaku.com and bundled into the unified all-in-one Migaku product under a single subscription.784 Cards can also display pitch-accent information.78

Memory is a layer, not a separate purchase

The older standalone Migaku browser add-on is deprecated and "no longer maintained by Migaku," though still downloadable as legacy software.16 Memory is not a second product to buy. It is the SRS layer inside the current all-in-one Migaku, where one subscription covers the extension, the mobile apps, and Memory.

Migaku is sold as a subscription with monthly, yearly, and lifetime options, plus a money-back guarantee window.78 Published figures conflict across sources and dates, so the safest reading is simply "subscription, with a lifetime option." Check the live price before you commit.

Its strength is the tightest video-to-card pipeline for immersion. Its trade-offs are the heaviest setup of the group, the subscription, and a broad, multi-language (not Japanese-only) focus.7

The Comparison Matrix​

The table below gives a scannable, side-by-side view of Anki alternatives for Japanese, with Anki itself as the baseline reference row. Pricing appears as bands or "subscription" rather than hard figures, because vendor pricing changes. Verify the live number before paying.

ToolPlatformSchedulerContent modelPricingBest for
Anki (baseline)Desktop, mobile, web (AnkiWeb); AnkiMobile iOS is paidSM-2 by default; FSRS available (opt-in)DIY, community shared decks, or add-on miningFree (desktop, Android, web); paid iOS appTotal control and a vast deck/add-on ecosystem
JPDBWeb (installable as a home-screen progressive web app; no native app)1Proprietary machine-learning scheduler (forgetting-curve; not SM-2, not FSRS)15Auto-mine: prebuilt per-title decks from anime, manga, novels, visual novels, games, plus frequency lists5Free core; optional Patreon support from $5/mo106Immersion-driven review with zero deck-building
WaniKaniWeb (third-party mobile apps exist)SRS on a fixed level-gated path9Curated fixed path: radical → kanji → vocabulary; no custom mining9First 3 levels free; then $9/mo, $89/yr, $299 lifetime1211Structured, mnemonic-driven kanji acquisition
MochiMac, Windows, Linux, iOS, Android, web213FSRS support (verify on Mochi's docs); Anki import13DIY Markdown cards; no community-deck portal2Freemium: free tier + Pro ~$5/mo (band)2A clean cross-platform editor for self-made cards
KitsunWeb143SRS (algorithm not stated on official page)Community decks plus card tools, reader, Subs2Kitsun143Subscription: $8/mo, $64.99/yr, $199 lifetime14Ready-made, community-maintained shared decks
Migaku (Memory)Browser extension + iOS + Android + Memory web + Anki add-on784SRS / "Memory" layer in the all-in-one appAuto-mine from subtitles and web text; pitch accent on cards78Subscription with lifetime option (figures conflict)78The tightest video-immersion-to-card pipeline

How to read the matrix: pick by your friction point, not by hype​

The matrix is most useful when read backwards: start from the thing about Anki that is slowing you down, then follow it to a tool.59237

  • If your friction is deck-building effort, reach for an auto-miner: JPDB for reading or Migaku for video.57
  • If your friction is no kanji structure, take WaniKani's fixed path.9
  • If your friction is wanting good ready-made shared decks, use Kitsun's community decks.3
  • If your friction is a clumsy editor, or if you want clean cross-platform notes, use Mochi.2
  • If your friction is "Anki on mobile is painful, and I want native FSRS on my phone," the recommendation below answers it directly.

The Mobile-FSRS Recommendation: Amenokori​

The matrix above deliberately leaves one common case open: the learner who is not unhappy with spaced repetition itself, only with running it through Anki on a phone, and who specifically wants the modern FSRS scheduler running natively. For that lane, J-Compass recommends Amenokori.17

Amenokori is built mobile-first for iOS and Android, and it runs an FSRS-only scheduler. That is exactly the combination Anki's mobile experience makes awkward.17 It ships a sizeable bundled library ("10K+" words and grammar entries, "150K+" quiz questions) labeled across N5 to N1, the JLPT range from beginner to advanced, with 7 quiz types, including a kana quiz of 92 characters with audio.17

On the kanji side, it covers all 2,136 jōyō kanji, the standard-use kanji, frequency-sorted. It surfaces on'yomi and kun'yomi readings, plus meanings per kanji, inside the vocabulary entries that use them rather than as an isolated kanji deck.17 The free tier opens the full N5 to N1 library under a daily cap of 20 new cards and 150 reviews. Premium is quoted at $5.99/month, $59.99/year, or $150 lifetime.17

Amenokori's per-level counts are its own leveling, not official JLPT figures

Amenokori lists per-level vocabulary as N5 801, N4 750, N3 3,355, N2 1,477 plus 855 extended, and N1 3,239 plus 803 extended.17 These are Amenokori's own levels, not official Japanese-Language Proficiency Test (JLPT) counts. The JLPT has not published official vocabulary lists since its 2010 revision, so every per-level figure is a publisher's estimate. Do not cite "N3 3,355" as "the JLPT N3 vocabulary count."

The recommendation is for this lane specifically. Amenokori is not pitched as better than JPDB for immersion mining or better than WaniKani for kanji structure. It is the pick when "genuinely mobile-first, native FSRS, no fighting Anki on the phone" is the requirement.17

Good to know​

Switching tools resets nothing about the work​

The hard part of spaced repetition is reviewing daily and grading honestly, and no tool removes that obligation. The scheduler decides only when a card returns.1 Tool-hopping is one common form of study procrastination. A switch is worth it only when a specific friction point is genuinely blocking your reviews, not when you are avoiding them. If reviews themselves have become a grind, the real fix is usually When SRS Becomes Counterproductive: Anki Burnout, Leeches, and the Exit Signs, not a new app.

Free vs. subscription is a real trade-off, not a trap​

Anki's desktop app is free, and JPDB's core is free.10 WaniKani, Kitsun, and Migaku are subscriptions;12147 Mochi is freemium.2 What the money buys differs by tool: mining automation (JPDB's Patreon perks, Migaku),107 curated community decks (Kitsun),3 a structured kanji path (WaniKani),9 and mobile user experience with sync and publishing (Mochi Pro).2 Name the purchase before you pay. The spend then becomes a deliberate trade rather than a guess.

"Proprietary scheduler" vs. FSRS is worth understanding​

Schedulers genuinely differ. JPDB runs its own machine-learning scheduler (not SM-2, not FSRS).15 Anki defaults to SM-2, with FSRS as opt-in. Mochi and Amenokori run FSRS, with Amenokori being FSRS-only.17 FSRS is the modern open standard. The mechanism behind SM-2 versus FSRS is covered in SM-2 vs. FSRS: How Anki's Scheduling Algorithms Work rather than re-derived here.

Can you run more than one?​

You can, but a single review queue is generally more sustainable than two half-finished ones. The sensible multi-tool pattern is one auto-miner (JPDB or Migaku) paired with one structured kanji track (WaniKani), not several overlapping vocabulary queues competing for the same daily minutes.597

See also​

References​

Footnotes​

  1. jpdb. "Frequently asked questions." jpdb.io product FAQ. https://jpdb.io/faq ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11 ↩12 ↩13 ↩14

  2. Mochi. "Mochi - Spaced repetition flashcards." Product landing and pricing page. https://mochi.cards/ ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11 ↩12 ↩13 ↩14 ↩15 ↩16

  3. Kitsun. "The Ultimate SRS Study Platform" and "Community Decks" feature pages. https://kitsun.io/ ; https://kitsun.io/features/community/ ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11

  4. Migaku. "Migaku Memory for Web." SRS study app. https://study.migaku.com/ ↩ ↩2 ↩3 ↩4

  5. jpdb. "Japanese dictionary and spaced repetition system." jpdb.io product landing page. https://jpdb.io/ ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11 ↩12

  6. Tofugu. "JPDB.io Review." Japanese Learning Resources Database. https://www.tofugu.com/japanese-learning-resources-database/jpdb-io/ ↩ ↩2 ↩3

  7. Migaku. "Pricing." Product pricing page. https://migaku.com/pricing ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11 ↩12 ↩13 ↩14 ↩15

  8. Migaku. "FAQ" (Pricing & Plans, Tools + Features). https://migaku.com/faq ; https://migaku.com/faq/pricing ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8

  9. WaniKani (Tofugu). Product landing / about page. https://www.wanikani.com/ ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10

  10. jpdb. Patreon support page. https://www.patreon.com/jpdb/about ↩ ↩2 ↩3 ↩4

  11. WaniKani (Tofugu). "Is WaniKani Free?" WaniKani Knowledge. https://knowledge.wanikani.com/getting-started/payment-and-billing/wanikani/wanikani-free/ ↩ ↩2 ↩3

  12. WaniKani (Tofugu). "Subscription Plans." WaniKani Knowledge. https://knowledge.wanikani.com/account-and-membership/payment-and-billing/subscription-plans/ ↩ ↩2 ↩3

  13. Mochi. App Store listing, "Mochi - Flashcards and notes." https://apps.apple.com/us/app/mochi-flashcards-and-notes/id1507775056 ↩ ↩2 ↩3 ↩4

  14. Kitsun. "How much does Kitsun cost?" Kitsun Knowledge Base. https://knowledge.kitsun.io/articles/How-much-does-Kitsun-cost/ ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7

  15. Tofugu. "Kitsun.io Review." Japanese Learning Resources Database. https://www.tofugu.com/japanese-learning-resources-database/kitsun/ ↩

  16. migaku-official. "Migaku-legacy-guides" repository: "These are legacy guides for deprecated Migaku software. This software is still available but is no longer maintained by Migaku." https://github.com/migaku-official/Migaku-legacy-guides ↩

  17. Amenokori. Product landing page. https://amenokori.com ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8