Product archive / 知之
Preserved September 25, 2026
ZhiZhi
A companion for every page.
An AI study companion for papers and lecture slides. Bring in a PDF, choose your explanation language and up to three voices, and listen to a conversation about the page in front of you.
01 / The original app
A closer look.
Original App Store screenshots. Select an image to view it at full size.
View the iPad screenshots
Page by page
Keep the explanation connected to the document you are reading, instead of losing the context in a separate conversation.
Choose your companions
Select one to three explanation characters and a language before generating an audio interpretation.
Powered by KeTing
The original application credits KeTing for its AI podcast generation technology.
02 / In motion
Three original demonstrations.
Preserved directly from the historical website repository, without editing or transcoding.
03 / The record
The product, preserved.
- App Store debut
- January 2025
- App Store version at capture
- 1.0
- Developer
- CoreSpeed Inc.
Product images and available demonstration videos are stored locally with this archive. Release information comes from the App Store. This archive preserves the product’s presentation, not its live generation service.