OpenCone

On-Device RAG with Pinecone

Only for iPhone

Free · Designed for iPhone

iPhone

Turn every file on your iPhone into a searchable, on-device RAG workspace with Pinecone-powered recall and streaming OpenAI answers. Transform your iPhone and iPad into a self-contained RAG powerhouse. Import PDFs, Word docs, code, images, and text into a secure sandbox - extraction, embedding, and semantic search happen with zero lock-in. Point the app at your OpenAI and Pinecone credentials for a private knowledge base that streams grounded, citation-backed answers in real time. COMPLETE DOCUMENT PIPELINE • Multi-format extraction: PDF, DOCX, TXT, HTML, Markdown, JSON, CSV, and code • Apple Vision OCR for on-device image text recognition • MIME-aware chunking with configurable size and overlap • Security-scoped bookmarks preserve file access across launches • Deduplication by path, size, and timestamp fingerprinting • Live progress tracking with structured logs for every phase SEMANTIC SEARCH WITH STREAMING • One-tap queries embed prompts and run similarity search against Pinecone • Server-Sent Events deliver incremental answer deltas—no blocking spinners • Citations reference exact chunks with document names and source metadata • Metadata filters scope searches to specific documents or custom tags • Conversation memory keeps recent turns in context for coherent follow-ups GPT-5 REASONING MODEL SUPPORT • Choose between standard models (GPT-4o, GPT-4o mini) or GPT-5 • Dynamic controls: reasoning effort for GPT-5, temperature/top-p for others • Unified Responses API with conditional parameterization RESILIENCE & OBSERVABILITY • Pinecone health checks surface outages with dismissible banners • Circuit breaker prevents hammering unhealthy hosts • Watchdog timers catch stalled streams and trigger fallbacks • Per-search trace IDs and granular log levels make every stage inspectable • Error banners auto-dismiss after 8 seconds with user-friendly summaries SETTINGS & PRIVACY • Credentials in Keychain via SecureSettingsStore • Release guardrails prevent accidental key leaks • Model selection, chunk parameters, top-k defaults, metadata presets persist • Reset control wipes credentials and history without reinstalling • Guided onboarding validates API keys before unlocking main interface POLISHED SWIFTUI EXPERIENCE • Theme manager with alternate icons and dynamic color schemes • Reactive MVVM-S architecture decouples views from business logic • Async/await throughout keeps UI responsive during heavy operations • Design system components ensure consistency across all tabs Whether building surgical references, legal research corpora, or personal knowledge vaults, OpenCone delivers production-grade RAG without vendor dashboards or billing surprises.

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Version 2.2 brings GPT-5.2 support, smart prompts, and bunch of other stuff. I reworked the UI entirely.. GPT-5.2 REASONING MODEL • Full GPT-5.2 support with 400K context and 128K output tokens • New reasoning effort levels: Off, Low, Med, High, and Max (xhigh) • Updated token limits for modern AI capabilities SMART EXAMPLE PROMPTS • Contextual prompts based on your selected index and namespace • Four categories: Discover, Analyze, Extract, Compare • Tap any suggestion to instantly search • Prompts adapt when Charts & Calculations is enabled CHARTS & CALCULATIONS (Code Interpreter) • Visualize data from your documents as charts • Calculate totals, averages, and trends • Extract structured tables and export to CSV/JSON • Create timelines and comparison visualizations • Quick Settings panel with sliders and presets • Haptic feedback and custom system prompts

The developer, Gunnar Hostetler, 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 Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    • Seller
      • Gunnar Hostetler
    • Size
      • 3.9 MB
    • Category
      • Developer Tools
    • Compatibility
      Requires iOS 17.6 or later.
      • iPhone
        Requires iOS 17.6 or later.
      • Mac
        Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
      • Apple Vision
        Requires visionOS 1.3 or later.
    • Languages
      • English
    • Age Rating
      4+
    • Copyright
      • © 2025 Gunnar Hostetler