Trelk
Read, Think, Connect
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What is Trelk?
Trelk is a personal knowledge engine built to help you save what you read, understand it more deeply, and connect ideas across your library. It lets you capture articles, research papers, YouTube videos, PDFs, DOCX files, newsletters, documentation, and personal notes, then automatically extracts, summarizes, tags, and embeds them so they become searchable and connected over time.
Its core value is turning a collection of saved items into a knowledge graph. Trelk surfaces related items by semantic similarity, similar tags, topic clusters, and co-occurring concepts, so you can discover links you might not notice manually. It also includes a visual map of your library, tag network views, and related-topic exploration to help you browse knowledge in a more structured way.
Trelk also includes a chat interface for asking questions about your own library. Answers are grounded in your saved content and include clickable source citations back to the original items, with support for local on-device AI as well as OpenAI or Anthropic models. A searchable conversation history is also included.
The app is designed for people who want a private, offline-capable, long-term system for reading, note-taking, reviewing, and research. It targets users who value ownership and portability, with open formats like Markdown and SQLite, export options such as CSV and JSON, and optional sync to Google Drive, OneDrive, Dropbox, or iCloud.
Trelk pricing
Pricing model: Freemium
Trelk is sold as a one-time purchase with no subscriptions, no monthly fees, and no usage limits. The website says one purchase includes all features, free updates, no account required, and fully offline use. It also says cloud sync is optional, and sync can be configured with Google Drive, OneDrive, Dropbox, or iCloud. A public App Store listing shows a price of SAR 39.99 for one version of the app, while the website itself emphasizes the buy-once model rather than a tiered subscription plan.
Trelk pros
- Saves articles, papers, notes, PDFs, DOCX, and videos
- Automatic content extraction from imported items
- AI-generated summaries for each item
- Automatic tagging of saved content
- Semantic embeddings for deeper search
- Hybrid search with keywords and vectors
- Collections and smart filters
- Built-in PDF, web, and markdown reader
- Knowledge graph for connected ideas
- Semantic clustering of the library
- Tag network graph for topic relationships
- Chat with your entire library
- Source citations inside chat answers
- Local on-device AI support
- Option to use OpenAI or Anthropic
- Flash review with spaced repetition
- Daily AI knowledge briefing
- Community-curated collections import
- Markdown editor for personal notes
- Auto-save while writing
- Open formats with Markdown and SQLite
- Export library to CSV or JSON
- Full backup and restore support
- No account required
Trelk cons
- Google Play listing says coming soon
- No subscriptions may still mean a higher upfront cost
- Local AI depends on device performance
- Advanced AI features may require user-provided API keys
- Best experience depends on importing enough content
- Knowledge graph features may feel overkill for casual note-taking
- Offline-first design may limit some cloud conveniences
- Only 6 languages are listed
- Community collections depend on outside contributors
- Visual clustering may be confusing for simple filing needs
Frequently asked questions about Trelk
What is Trelk?
Trelk is a personal knowledge engine that lets you save content you read, then uses AI to summarize, tag, embed, and connect that content so you can search it, chat with it, and discover relationships across your library.
What kinds of content can I save?
You can save URLs, scan QR codes, import PDFs and DOCX files, and write notes in the built-in Markdown editor. The site also says it works with articles, research papers, YouTube videos, newsletters, documentation, and personal notes.
How does Trelk help me find information later?
Trelk uses hybrid search that combines full-text keyword search with semantic vectors, so you can search by exact terms or by meaning. It also adds collections, tags, smart filters, and related-topic discovery to make retrieval easier.
Does Trelk create a knowledge graph?
Yes. Every saved item becomes part of a knowledge graph, and the app also shows semantic clusters and a tag network graph so you can explore how items and topics connect across your library.
Can I chat with my saved library?
Yes. Trelk includes a chat experience that answers questions using retrieval across your saved content, and the responses include clickable source citations that point back to the original items in your library.
Does Trelk work offline?
Yes. The site says the app works fully offline and that AI can run entirely on-device. It also says no accounts are required and no data leaves your phone unless you choose optional sync or external AI providers.
What AI options does Trelk support?
Trelk offers local on-device AI, and it also lets you choose OpenAI or Anthropic if you want cloud-based models. The website says you can switch between those options anytime.
How does Trelk help with memorization?
Trelk generates flash review questions from your content and uses spaced repetition scheduling to help you retain what you read. It also tracks retention, accuracy trends, and topic performance over time.
Can I export or back up my data?
Yes. Trelk says notes are stored in Markdown and the database uses SQLite, and you can export your library as CSV or JSON. It also supports full backup and restore of the database and downloaded files.
How is Trelk priced?
The website says Trelk is a buy-once app with no subscriptions, no monthly fees, no usage limits, free updates, and all features included. It also mentions a one-time App Store price listing of SAR 39.99 for one version of the app.