Fulin Flashcard technical specification

Fulin Flashcard is a lightweight, offline-capable browser SRS whose decks and review state are stored in the current browser. It uses transparent fixed intervals rather than FSRS or SM-2 and does not currently provide automatic cross-device sync or a full backup preserving review history.

Scheduler	Six fixed levels: 1, 3, 7, 14, 30, and 60 days. Pass advances one level; fail resets to level 0.
Review state	Next-review time, level, and card data are maintained in browser localStorage.
Deck storage	Saved decks are compressed and stored in browser localStorage on the current browser profile.
Offline boundary	A service worker caches the application after a successful first online visit. Core saved-deck review can work offline; remote translation, speech, analytics, and link services are not promised offline.
Account and sync	No account is required for the core workflow. No automatic cloud or multi-device sync was verified.
Import	Vocabulary can be pasted or dropped as CSV, tab-separated text, or JSON and extracted into decks. An Anki package importer was not verified.
Export and backup	Vocabulary can be downloaded as CSV, copied as tab-separated text, or shared by URL. No full backup/restore UI preserving all review history was verified; clearing site data can remove local decks.
Accessibility boundary	Core controls use native buttons or keyboard-operable roles, visible focus styles, accessible names, and review keyboard shortcuts. No current WCAG conformance audit or screen-reader certification is claimed.
Failure and recovery	Application error boundaries expose a retry action, and failed network-assisted generation directs users to the direct Paste workflow. Locally deleted or browser-cleared review history cannot currently be restored from a full product backup.
Languages	Chinese, German, Spanish, Italian, French, English, Korean, Japanese, and Vietnamese are represented in the current language configuration; UI and generation support differ by language.
Price	Free.

Fulin Flashcard versus Anki

Decision	Fulin Flashcard	Anki
Setup	Open a browser and create/paste vocabulary	Install a full study application; AnkiWeb complements the desktop/mobile apps
Scheduling	Simple, disclosed fixed intervals	More sophisticated and configurable scheduling
Offline	Core cached browser workflow after first visit	Native desktop/mobile study works locally
Sync/backup	No verified automatic sync or full backup UI	AnkiWeb sync plus documented import/export
Ecosystem	Focused language-vocabulary workflow	Large shared-deck, template, and add-on ecosystem

Choose Fulin Flashcard for low setup and transparent behavior. Choose Anki when durable cross-device sync, extensive imports/exports, add-ons, or advanced scheduling matter more than simplicity.

Other browser-first alternatives

Decision	Fulin Flashcard	Rember	Quizlet
Primary workflow	Paste or import custom language vocabulary, then review it with disclosed fixed intervals	Generate and edit cards from learning material, then use spaced repetition	Create, find, share, and study large collections of general-purpose flashcard sets
Browser/offline claim	Installable cached browser app after the first successful visit	Official site describes a desktop/mobile progressive web app that works offline	Browser flashcards are online; official offline documentation is specifically for iOS and Android apps
Data boundary	Current browser storage; no automatic sync or complete review-history backup	Account-based product; verify current import, export, and review-data behavior before migrating	Account-based sharing and sync across a much larger hosted ecosystem
Best fit	Low-friction, custom language lists with transparent scheduling	AI-assisted card creation and a more guided spaced-repetition workflow	Finding and sharing mainstream study sets and using multiple study modes

Name note: the original research brief said “Rebmemer,” but no official flashcard product under that spelling could be verified. This comparison uses Rember, the identifiable product whose official page matches the described browser spaced-repetition category. It does not assume the two names are interchangeable.

Verification method

This specification was checked against the scheduling configuration, localStorage reads/writes, deck-link implementation, and service-worker registration in the application repository. It deliberately distinguishes “code path exists” from a guaranteed network service.

Limitations and corrections

Browser data can be lost when site storage is cleared, a private session closes, or a browser profile is removed. Make a separate copy of important vocabulary until a full backup feature is published. Send corrections to hello@fulinlabs.com.

Open Fulin Flashcard · Product overview · Official Anki manual · Rember official site · Quizlet flashcards · Quizlet offline documentation