SigmaNote: Knowledge Companion
AI capture learn talk refine
Free · In‑App Purchases · Designed for iPad
SigmaNote is back as your AI Knowledge Companion — capture anything, talk it through with AI, and refine ideas into clarity you can use at school or work.
SigmaNote has been rebuilt for a new way of learning and thinking.
It’s not just a place to store notes — it’s an AI Knowledge Companion that helps you capture knowledge from any format, discuss it in context, and refine it into something you can actually use.
Whether you’re studying for finals, preparing a client report, reviewing contracts, or learning from meetings, SigmaNote turns scattered information into a growing knowledge system — powered by AI.
Why SigmaNote
Acquire knowledge faster. Capture content from anywhere in seconds.
Understand deeper. Ask AI to explain, connect, and summarize across all your materials.
Learn by discussion. Talk through ideas like you would with a mentor or teammate.
Improve by iteration. Turn mistakes, drafts, and notes into clarity over time.
Make knowledge usable. Recall the right thing at the right moment — not three folders later.
What you can do
Capture anything into your knowledge space
• Add Spaces to organize topics like folders
• Add Bookmarks to save web resources
• Add Files of all kinds (PDFs, docs, slides, images, transcripts)
• Use the floating red + button to capture content instantly
Real-time voice + system audio transcription
• Record conversations or lectures in the background
• Multi-language transcription in real time
• System Audio Mode captures app audio once permission is granted
• Review pending transcripts and import them into your knowledge base anytime
Chat with AI in context
• Ask questions about selected text in documents
• Get step-by-step explanations tied to your materials
• Connect concepts across files, notes, and transcripts
• Turn reading into active learning
OCR and smarter imports
• Extract text from scanned PDFs
• OCR for images and documents
• Scrape YouTube videos even without subtitles
• Bring knowledge from the web into one searchable place
Built for every kind of thinker
Students, researchers, consultants, lawyers, product teams, clinicians, creators — anyone who wants knowledge that doesn’t just sit there, but helps them grow.
Term of services & privacy policy:
https://www.signifyid.com/terms/view.html?doc=privacy_policy
https://www.signifyid.com/terms/view.html?doc=term_of_service
Ratings & Reviews
- Support webarchive file format import
- Support image file formats
- Support apple notification for long running conversion tasks
- Bug fixes
The developer, SignifyID LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- User Content
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SignifyID LLC
- Size
- 93.8 MB
- Category
- Productivity
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- SigmaNote Premium Plus Yearly $116.99
- SigmaNote Premium Plus Monthly $12.99
- SigmaNote Premium Monthly $8.99
- SigmaNote Premium Yearly $80.99
- Copyright
- © SignifyID LLC
