Show HN: Trelk – Read, Think, Connect
Trelk is a one-time purchase, privacy-first app that uses on-device AI to save, organize, and connect articles, papers, and notes. Features include hybrid search, knowledge graph, RAG chat, flashcard spaced repetition, and community collections.
Article intelligence
Key points
- One-time purchase, no subscriptions
- On-device AI-powered knowledge management and connection
- Hybrid search, knowledge graph, RAG chat, and flashcard review
- Privacy-first, fully offline capable
Why it matters
This matters because one-time purchase, no subscriptions.
Technical impact
May affect model selection, inference cost, product capability, and evaluation benchmarks.
Trelk — Read, Think, Connect
Buy once. No subscriptions, ever.
Read. Think. Connect ideas.
Save articles, papers, and notes. AI discovers hidden connections across everything you read. Build a knowledge base that grows with you.
App Store
Google Play — Coming Soon
Phone · Tablet · Your knowledge everywhere
Capture everything. Find anything.
Share URLs, scan QR codes, import PDFs, DOCX files, or write notes. Everything is automatically extracted, summarized, tagged, and embedded.
Hybrid search: full-text keywords + semantic vectors
Collections, tags, and smart filters
Bulk operations with swipe gestures
Built-in PDF, web, and markdown reader
Every piece of knowledge, deeply understood.
AI generates summaries, extracts tags, classifies content, and discovers connections to your existing library. Every item becomes part of your growing knowledge graph.
AI-generated summaries and tags
Connected items by semantic similarity
Items with similar tags surfaced automatically
Related topic search for further exploration
See your ideas come alive.
A force-directed knowledge graph reveals how every item connects. Same-topic links. Cross-topic bridges. The shape of your thinking, visualized.
Your knowledge, mapped.
AI organizes your library into semantic clusters. Each dot is an item. Each color is a topic. Pinch to zoom, tap to explore. Watch new patterns emerge as your library grows.
Agglomerative clustering by semantic similarity
Auto-named clusters with AI
Tap any cluster to see its items
Rebuild on demand as your library evolves
Discover hidden connections.
The tag network graph shows which topics co-occur across your library. Tap any tag to see its connections and explore the items that share it.
Tags are nodes, co-occurrence forms edges
Colors match your knowledge clusters
Tap a tag in any item to jump to the graph
Navigate from tag to items and back seamlessly
Chat with your entire library.
Ask questions and get answers grounded in your own reading. Every response includes clickable source citations linking back to your original items.
Retrieval-Augmented Generation (RAG) across all content
Streaming responses with source citations
Choose your AI: local on-device, OpenAI, or Anthropic
Conversation history saved and searchable
No API keys? No problem.
Don't want to pay for closed-source LLMs? We got you. Trelk ships with open-source AI models from Hugging Face that run entirely on your device. No API keys, no subscriptions, no data leaving your phone. Ever.
AI Analysis
Qwen3-0.6B
Alibaba's latest-generation language model with 600M parameters. Supports 100+ languages, excels at summarization, classification, and tag extraction. Thinking and non-thinking modes for optimal reasoning. 32K token context window.
Summarization Tag extraction Chat 100+ languages
Embeddings
EmbeddingGemma 300M
Google's state-of-the-art embedding model built from Gemma 3 and the same research behind Gemini. 300M parameters, 768-dimension vectors, 2K token context. Multilingual support for 100+ languages. Designed specifically for on-device deployment.
Semantic search Clustering 768 dimensions On-device
Want more power? Switch to OpenAI or Anthropic with your own API key anytime. Or swap in any GGUF model from Hugging Face — just paste the URL and download.
Your daily knowledge briefing.
Every morning, AI synthesizes your recent reading into a personalized briefing. Fresh connections between items are surfaced automatically. Never miss a pattern forming in your library.
AI-generated morning briefing from recent saves
Fresh connections discovered across your library
Suggested next reads based on your interests
Scheduled push notifications at your preferred time
Remember everything with flash review.
AI-generated flash cards test your recall with spaced repetition scheduling. Track your retention rate, accuracy trends, and topic performance over time.
Smart spaced repetition scheduling per item
66%+ retention scores with 14-day accuracy charts
Filter by collection, topic, or review all
Topic performance breakdown shows your strongest areas
AI analyzes your knowledge landscape.
Per-cluster insights reveal patterns, gaps, and suggestions. A library overview shows which areas run deep and what domains are missing.
Open-source knowledge. Import and share.
Browse curated reading lists built by the community. Import entire collections with a single tap. Every item gets processed, tagged, embedded, and connected to your library.
GitHub-hosted, community-curated collections
One-tap import with full AI processing
Share your own collections with others
Auto-linking to your existing knowledge base
Write your thoughts. Connect them to everything.
A full markdown editor with formatting toolbar and image insertion. Your notes are embedded and clustered alongside all your other content.
Full markdown with live formatting toolbar
Insert images from camera or gallery
Auto-embedded, tagged, and clustered
Auto-save as you type
Watch your knowledge grow.
Track your reading streak, knowledge score, topic depth, and content mix. Earn milestones as your library expands. See how your knowledge evolves over time.
Knowledge score, streaks, and milestones
Weekly activity charts and reading progress
Topic depth analysis by cluster
Top sources and tag distribution
Pay once. Own it forever.
No subscriptions. No monthly fees. No usage limits. One purchase gives you the full app, every feature, and every future update.
✓ One-time purchase
✓ All features included
✓ Free updates
✓ No account required
✓ Works fully offline
Open formats everywhere
Notes are stored as Markdown. Your database is SQLite — the most widely used database format in the world. No proprietary blobs, no walled gardens. Every byte of your data is in a format any tool can read.
Import & export freely
Export your entire library as CSV or JSON anytime — every field, every tag, every connection. Import just as easily. Move between tools, run your own analysis, or archive everything outside the app. Zero friction in, zero friction out.
Full backup & restore
One-tap backup of your complete SQLite database and all downloaded files to your cloud. Restore on any device, any time. Items, tags, embeddings, connections, collections, downloaded content — everything preserved, nothing left behind.
Private by default
No accounts, no tracking, no data leaving your phone. AI runs entirely on-device. Cloud sync is optional and encrypted by your provider. The app works fully offline with zero configuration.
Sync with your favorite cloud
Google Drive
OneDrive
Dropbox
iCloud
Built different.
Privacy-first, offline-capable, powered by cutting-edge AI running on your device.
Privacy first
Your data stays on your device. No accounts required.
Works offline
Local AI models run entirely on your phone.
Hybrid search
BM25 + vector embeddings fused via Reciprocal Rank Fusion.
Your choice of AI
Local, OpenAI, or Anthropic. Switch anytime.
Semantic clusters
Agglomerative clustering with 2D projection.
Vector embeddings
768-dim on-device embeddings with smart content selection.
Community collections
Import curated reading lists from GitHub.
Cross-platform
Android & iOS. Phone & tablet optimized.
Start building your knowledge base
Buy once, use forever. Your knowledge, your device, your control.
App Store
Google Play — Coming Soon