How does Tomaru compare to other flashcard apps?

Tomaru combines open-source FSRS spaced repetition scheduling with an integrated library of ready-made cards, automated personal parameter training, time-budgeted study tools, and flexible content capture across iOS, Android, and the web. While basic flashcard engines focus solely on review timing, Tomaru manages the complete vocabulary workflow, offering full core features for free without requiring manual configuration or paid add-ons.

What does spaced repetition leave unanswered?

Spaced repetition algorithms answer a single mathematical question: when should a card appear for review? The underlying scheduling engine does not dictate the quality of the flashcards, how to handle days when time is short, or how to measure long-term goals.

Tomaru addresses five critical areas that raw spaced repetition scheduling leaves open:

1. Card quality and context: FSRS schedules a bare word pair with the same precision as a rich card. Tomaru provides a ready-made library of more than 410,000 cards. Every card includes an example sentence, and roughly 99 percent feature part-of-speech labels and grammar notes written in the learner's own language.
2. Prioritizing cards under time constraints: Spaced repetition queues list cards strictly by due date without prioritizing relative value. When time is short, Smart Study measures your personal answering speed, calculates the memory gain per second each due card offers, and fills your time budget with the most valuable reviews.
3. Optimizing parameters for individual memory: You can trigger personal optimization in your settings once you complete roughly 1,000 reviews spaced at least one day apart per card. Our servers fit all 21 FSRS parameters using the official FSRS optimizer, then apply the finished configuration automatically across all your devices without any manual math, exports, or data entry.
4. Projecting completion dates: Spaced repetition processes cards one at a time, making long-term planning difficult. Tomaru simulates daily study progress using your historical rating distribution to generate a finish date, a forecast of future review volume, and a retention curve. You can also pick a target completion date to calculate your required daily new-word limit.
5. Reducing friction to review: Spaced repetition depends on showing up the exact day a card comes due. Tomaru provides home screen widgets for iOS and Android containing all four rating buttons, allowing you to complete reviews directly from your home screen without opening the full application.

How do feature categories compare across tools?

Flashcard tools generally fall into distinct categories: open-source desktop-first engines like Anki, sentence-context drill tools, note-taking apps with flashcard plugins, guided language courses, and integrated platforms like Tomaru.

When is a different application the better choice?

No single tool suits every study style or technical preference. Other options may fit your needs better under specific circumstances:

• Anki: Best if you require custom HTML/CSS card templates, specialized community add-ons, or complete local data control.
• Sentence-context drill tools: Better suited if your goal is practicing full-sentence production, output grammar, or typing out complete sentences rather than acquiring individual vocabulary words.
• Guided course apps: Ideal for absolute beginners who want a structured path covering elementary grammar and conversational foundations before managing an independent flashcard collection.

To learn more about how Tomaru handles spaced repetition, read our guide on what Tomaru is or review our pricing page for details on free core features and weekly quotas.

Related questions

Isn't Tomaru just a friendlier interface wrapped around FSRS?

No. While Tomaru uses open-source FSRS for scheduling, it also includes ready-made contextual content, one-tap 21-parameter server fitting, Smart Study queue prioritization, completion forecasting, and seven ways to capture new words that extend beyond core scheduling.

Does Tomaru use the same FSRS algorithm as Anki?

Yes. Tomaru runs open-source FSRS-6 for all scheduling. When you optimize your parameters, our servers run the fitting process using the official FSRS optimizer—the exact implementation that Anki uses.

Why is Tomaru free on iOS while Anki's iOS app is a paid purchase?

Anki funds its open-source development through a one-time paid purchase for its iOS app. Tomaru provides its core iOS, Android, and web apps for free, offering unlimited standard flashcard learning while applying weekly quotas to optional AI and audio generation tools.