A workspace for reading articles, PDFs, videos and podcasts with AI explanations and cross-source questions
Translate as you type on Mac with on-device translation
Stage
Startup
Startup
Founded
2026
2026
Based in
US
GB
Pricing model
Freemium
Paid
Pricing
Free plan with 100 comprehension units/month. Pro $9/month with 300 units. Premium $19/month with 600 units. Scholar $39/month with 1,200 units. Annual billing saves 17%: Pro $90/year, Premium $190/year, Scholar $390/year. Unit packs from $10 for 200 units.
US$9.90 lifetime Mac license, tax included. No free trial at launch. Full refund within 30 days of purchase.
Key features
Clean reading view for articles, PDFs, podcasts, videos and newsletters
Inline explanations for difficult passages written from surrounding context
Cross-source question answering with citations
Structural navigation showing key moments and density maps
Connected note-taking tied to source passages
Natural voice narration for listening
Notebook feature for gathering related sources with notes and questions
Discover shelf suggesting rights-cleared reading related to your library
Course builder to create lessons from saved documents
Integration with ChatGPT and browser extensions for Chrome and Firefox
Preview translations as you type in text fields
Support for Simplified Chinese Pinyin, English, Spanish and French input
Insert translations with keyboard shortcuts (Space or Return)
On-device translation without cloud upload
No input history saved
Clipboard protection
Works in standard macOS text input apps
Pinyin candidate selection with keyboard navigation
What makes it different
Explanations stay beside the source instead of requiring you to leave to look up terms
Questions cite specific passages from sources so answers are traceable
Notes automatically stay attached to the passages that prompted them
Works with PDFs, videos, podcasts and articles in one unified workspace
Translation runs entirely on your Mac without uploading data to cloud servers
Insert translations directly into text fields without switching windows or copying and pasting
Never reads or writes the clipboard, keeping your data private
One-time lifetime purchase with no subscription required
Uses Apple's built-in on-device translation for macOS
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