Intervals follow memory stability, not a five-box cartoon.
School
Nexora Leitner
Cards, scheduling, and an API a PWA can take offline — not a toy deck.
- FSRS / SRS engine
- Vocabulary schema
- Offline-ready API
Requires: Nexora Learn
What it is
Built for a job, not a feature list.
The name is historical. The scheduler is FSRS-5/6: stability, difficulty, interval fuzz, optional per-user weights, a weekly trainer. Cards carry article, example, dictation and pronunciation averages. The PWA syncs with a field-level CRDT so offline reviews do not wipe each other. LMS missed-quiz words ingest into the deck.
Results
What changes on the site.
CRDT field-level merge instead of last-write-wins destroying a card.
Dictation and pronunciation averages live on the card and in FSRS insights.
Capabilities
What the package actually does.
- FSRS-5/6 engine, grades 1–4, short-term same-day stability, interval fuzz
- Weekly FSRS trainer / optimizer injecting learned weights
- Word schema: de–fa, article, example, stability, difficulty
- REST: review, calendar, import/export, sentence and grammar drills, story, TTS
- Dictation + pronunciation submit; weekly report; FSRS insights
- Offline CRDT sync (LWW element/field sets) + conflict console
- Ingest missed LMS quiz words; requires Nexora Learn
Versus
Against the category leaders.
Honest deltas — not a fake scorecard. If a rival is better at a narrow job, the row says so.
| Leader | Where NexoraPlug differs |
|---|---|
| Anki | Anki is the gold SRS on the desktop. Leitner is a WordPress + PWA studio with LMS ingest and CRDT — not a separate app silo. |
| SuperMemo | SuperMemo invented the family. This is FSRS-5/6 inside a school product, with an API a phone can take offline. |
| WP Flashcards / SM-2 plugins | Most WP decks are boxes or SM-2. This is FSRS plus dictation, pronunciation, and conflict-aware sync. |
Seat
The zip is not on the internet.
Packages live in a vault outside the web root. A key is HMAC-bound to your hostname. Verify and download are rate-limited. Updates stop when the seat is cold. We do not remote-wipe content you already have — PHP that WordPress requires to be GPL can be copied; stolen copies simply do not get the next build.
How a key behaves