Phosphor
Spaced repetition app with FSRS: cards from lectures
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This is 1 of 38 launches in digital flashcard apps — see how it stacks up on momentum and crowding →
8 other launches read as similar to this one →
Details
- External ID
- 1271144
- Source
- PH
- Company
- —
- Product
- Phosphor
- Website domain
- producthunt.com
- Launched
- Oct. 11, 2026
- Cohort
- —
- Upvotes
- 2
- Upvotes percentile
- 0.76
- Tags
- Android, Productivity, Education
Description
Phosphor is a spaced repetition app for people who study from lectures. Paste a YouTube link, type a topic, or paste notes you already have. It writes a summary and notes, then builds flashcards from them, and each video card links to the second it came from. Cards are scheduled with FSRS, so each one comes back on the day it starts to fade. Export any deck to Anki. Free to start; Pro lifts the limits.
Enrichment
- Niche
- digital flashcard apps
- Vertical
- Education
- Function
- Workflow automation
- Audience
- B2C
- AI stance
- AI feature
- Project type
- Commercial product
- Normalized one-liner
- flashcard generator from lecture audio for students
- Manually corrected
- False
Could you build this?
Yes The app fetches YouTube transcripts via public APIs, summarizes and generates flashcards using LLM prompts with timestamps, and applies standard open-source FSRS algorithms for scheduling.
Competitors
Other products that read as similar to this one — 8 launches clear the similarity bar.
Attention rank: #2 of 9 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 54 days after the earliest competitor.
- RecallDeck · ph · 2026-10-08 · 2 upvotes · similarity 0.44
- Lacuna · ph · 2026-09-13 · 1 upvotes · similarity 0.40
- Flash Weaver · ph · 2026-10-08 · 1 upvotes · similarity 0.36
- Crammed · hn · 2026-08-18 · 5 upvotes · similarity 0.35
- StudyDaily · ph · 2026-10-06 · 2 upvotes · similarity 0.32
- FFFFinder · ph · 2026-09-29 · 78 upvotes · similarity 0.30
- Quizcard · ph · 2026-10-13 · 2 upvotes · similarity 0.30
- Lernoa · ph · 2026-10-08 · 1 upvotes · similarity 0.30