Best for: Students and researchers building a structured personal knowledge base
Price: Freemium · from $9.99/month
Free: Unlimited notes, objects and sync across devices, without AI
Platforms: Web, iOS, Android, Desktop app
Made by: Capacities Labs GmbH
App store ratings: iOS 4.3★ (114) · Android 3.1★ (605)

What it is

Capacities organises notes as typed objects such as people, books and ideas, with daily notes and links between them. Its core is free and unlimited; Pro adds an AI assistant and AI chat, analysis of images, PDFs and web links, task management and calendar integration.

What the AI does

AI assistant and AI chat over your notes
Image, PDF and web-link analysis
Smart queries
AI connectors and public API

Pros and cons

Generous free plan with unlimited notes
Distinctive object-based structure
Offline support and capture from WhatsApp, Telegram and email

AI only on the paid plan, with a modest budget
Mobile apps are rated poorly

How it scores

Note quality7.5

Ease of use7

Features7.5

Value for money8.5

Platforms9

Great free core and fair Pro price; the AI is useful but light, and the mobile apps lag.

Feature checklist · 6 of 9

Ask AI questions about your own notes (yes)
AI writing help (draft, rewrite or summarise) (yes)
Records and transcribes audio or meetings (no)
Handwritten notes with a pen or stylus (no)
AI organises notes or surfaces related notes automatically (no)
Web clipper or quick capture from other apps (yes)
Works offline (yes)
Useful free plan (yes)
Apps for iPhone, Android and desktop (yes)

How we score apps →

Alternatives

See all Capacities alternatives, ranked →

Microsoft OneNote 8.2/10Students and Microsoft 365 users who want free notes with optional Copilot
Notion 8.1/10People and teams who want notes, docs and projects in one AI-powered workspace
Craft 8.1/10Apple users who want polished, well-structured notes and docs with AI
Goodnotes 8.0/10Students and tablet users who take notes by hand

Microsoft OneNote vs Capacities

Capacities review