Comparison

Lector vs Clozemaster

Lector is a self-hosted, one-time-free alternative to Clozemaster: the same frequency-ordered cloze practice, but paired with a full reading experience and Anki export, with your data on your own hardware and no subscription.

Cloud is in beta · self-hosting is free forever

Clozemaster is a gamified way to drill vocabulary through fill-in-the-blank sentences ordered by frequency, over large sentence banks. Lector includes the same frequency cloze practice, then wraps it in a reading-first workflow (import anything, click to translate, mine cards to Anki) — self-hosted and open source. Here's an honest side-by-side.
At a glance

Feature by feature.

Lector Clozemaster
Price Self-host free, or cloud from $5/mo Free (30/day); Pro $12.99/mo, ~$70/yr, or ~$199 lifetime
Frequency cloze practice Frequency-ordered, with SRS Yes — its core feature
Sentence bank size Thousands per language (Tatoeba) Very large banks (also Tatoeba)
Reading imported content EPUB, web articles, paste No — sentences only, not full texts
Click-to-translate On-device dictionary + LLM Per-sentence, in practice
Audio & listening Text-to-speech (Google, optional) Native-speaker audio (Pro)
SRS scheduling Yes Yes
Anki export First-party AnkiConnect export No documented Anki export
AI tutor & writing correction LLM tutor + writing correction No
Gamification Minimal — progress stats Points, streaks, leaderboards
Data ownership Your server (one SQLite file) Cloud account; no data export
Open source Open source (AGPL-3.0) Closed source
Languages 5 packs; reader works with any language 50+ languages, 100+ pairs
Mobile apps Web (installable PWA) Native iOS & Android apps

Clozemaster pricing and features as of July 2026; check Clozemaster for the latest. Comparison reflects our understanding at that date.

Where Clozemaster wins

What Clozemaster does better.

No tool is best at everything. Here's where Clozemaster genuinely has the edge — worth knowing before you choose.

Massive sentence banks

Clozemaster offers enormous collections of sentences per language — far more cloze volume than Lector's Tatoeba-sourced banks — across 50+ languages and 100+ pairings.

Gamified and sticky

Points, streaks, levels, and leaderboards make daily practice a habit. Lector keeps progress stats but is deliberately light on game mechanics.

Native apps + real-speaker audio

Polished iOS and Android apps, and for Pro, real-speaker Cloze-Listening audio plus TTS. Lector is a self-hostable web app with optional Google TTS.

Cheap, with a lifetime option

Clozemaster is inexpensive next to most apps, and offers a one-time lifetime purchase (around $199) that avoids recurring fees — though it's still closed and cloud-hosted.

Where Lector wins

What Lector does better.

Reading, not just sentences

Clozemaster drills isolated sentences; Lector adds a full reading workflow — import books and articles, read in context, and mine the words you actually meet.

Free to self-host

Open source and free on your own hardware, or Lector Cloud from $5/mo — versus a recurring Pro subscription (or a one-time lifetime fee) to lift the free tier's 30-a-day limit.

Your data, your server

Progress lives in a local SQLite file you own and can back up in one copy — no cloud account, and no documented export to get your data out of Clozemaster.

Anki export + LLM tutor

Push mined words to Anki over AnkiConnect, and get context-aware translation, a tutor, and writing correction from Claude or a local model.

The short version

Who should pick which.

Choose Clozemaster

Pick Clozemaster if you want the biggest sentence banks, heavy gamification to keep a streak, native mobile apps, or one of its 50+ languages — and you like the lifetime option.

Choose Lector

Pick Lector if you want cloze practice plus real reading and Anki export in one self-hostable app, and you'd rather own your data than pay a subscription.

Questions

Lector vs Clozemaster, answered.

See the method behind Lector, or browse the language guides.

Own your reading.

Open source to self-host for free, or on our cloud in a click. No subscription to keep your own library.