Lacuna
Flashcard App for the exam day.
Details
- External ID
- 1242999
- Source
- PH
- Company
- —
- Product
- Luna
- Website domain
- producthunt.com
- Launched
- Sept. 13, 2026
- Cohort
- —
- Upvotes
- 1
- Upvotes percentile
- 0.30815693820825313
- Tags
- Education, GitHub
- Fetched at
- Sept. 15, 2026, 1:02 a.m.
- Updated at
- Sept. 15, 2026, 1:02 a.m.
Description
Lacuna is a spaced repetition app that uses FSRS to schedule for the exam date, rather than indefinitely like Anki. Lacuna works around you - the scheduler can be used at all times, rather than just when the flashcard is due - which means that you can squeeze studying into the time that's convenient, without sacrificing quality It has easy importing from Anki and also all the features that you need. It's fully offline and private, with no data sent anywhere unless you choose the opt in sync.
Enrichment
- Theme
- Vertical
- Education
- Function
- Vertical SaaS
- Audience
- B2C
- AI stance
- Not AI
- Project type
- Commercial product
- Normalized one-liner
- flashcard revision app for students
- Manually corrected
- False
Could you build this?
Yes Open-source FSRS (Free Spaced Repetition Scheduler) algorithms are readily available in JS/Python, making this a customized scheduling wrapper on a flashcard CRUD app.
Competitors
Other products that read as similar to this one — 13 launches clear the similarity bar, closest 8 shown.
Attention rank: #8 of 14 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 7 days after the earliest competitor.
- Okiru · ph · 2026-09-15 · 2 upvotes · similarity 0.44
- Steliara · ph · 2026-09-30 · 2 upvotes · similarity 0.39
- USHA · ph · 2026-09-19 · 1 upvotes · similarity 0.36
- Moku Flashcards · ph · 2026-09-11 · 4 upvotes · similarity 0.36
- ExamSync.in · ph · 2026-09-18 · 2 upvotes · similarity 0.35
- WhileStudy · ph · 2026-09-28 · 1 upvotes · similarity 0.33
- Lock In Cert · ph · 2026-09-11 · 2 upvotes · similarity 0.32
- Chinese Trainer · ph · 2026-09-21 · 1 upvotes · similarity 0.31
Other launches for this product
Same idea, different domain
Nobody's really built a vertical saas tool for Insurance yet.