LexiconOS

Lexicon OS is a professional research AI app designed for PhD students, graduate researchers, and academic writers who need speed, structure, and data ownership.
It combines local-first storage, AI synthesis, citation tools and generation, and knowledge archiving — all in a single distraction-free interface. 

Demo video link: https://share.icloud.com/photos/03ekVYTFTWTBgbEL2npsdAEig

Lexicon OS is a one-time purchase app — no subscriptions, no ads, no feature gating.

$29.99 flat
All features included
No account required
No tracking, analytics, or data collection
You bring your own OpenAI API key. All content remains on your device.

CORE FEATURES
• AI-Guided Research
Input any query. Lexicon OS matches it against an internal knowledge base of 24,000+ structured entries. If relevant material is found, it synthesizes a response using GPT. Otherwise, it automatically retrieves and summarizes Wikipedia content for you — no browser required.

• Structured, Credible Citations
Lexicon OS connects to Semantic Scholar and CrossRef, pulling legitimate academic citations related to your query. These are:

Automatically formatted
Displayed below your GPT response
Saved locally
Searchable
Tappable — open full citation links from within the app
You don’t just get citations. You keep them. You use them.

• Local-First Storage Architecture
Your research lives on your device — not the cloud.
Everything is user or auto-saved:

Projects: Full GPT sessions
Artifacts: Saved messages and outputs
Citations: With titles, authors, years, and links
Notes: Freeform writing, stored and editable
• Saved Projects
Create and reopen projects anytime. Your full interaction history — including all citations and notes — is stored and available even offline.

• Notes Mode
Toggle into a focused writing mode for capturing your own thoughts. Notes are stored alongside your research and organized by title.

• Artifact Capture
Save any individual AI message as a persistent artifact. Build a custom library of responses you can reference without digging through entire sessions.

• Search Across Everything
Search by project title, note content, citation title, author name, or keyword. Retrieve saved outputs and references instantly.

• Designed for Focus
No dark patterns, no account nagging, no UI clutter. Just a fast, clean research interface that lets you think, write, and cite without noise.

PRICING AND MODEL
Lexicon OS is $29.99 once.
There are no recurring charges. You get full access.
There are no in-app purchases. No premium tier. No app account required.

You will need an OpenAI API key to use user generated AI summaries. This key is stored securely on your device and never leaves it.

BUILT FOR:
Graduate students and PhD researchers
Academic writers and citation-heavy workflows
Journalists and analysts
Engineers, policy writers, independent researchers
Anyone working local, in control, and long-term
Lexicon OS is not for casual chatting. It’s a permanent part of your research toolkit.

Lexicon OS is not an operating system.
The name refers to a focused suite of research tools for serious thinkers — not a literal OS. It runs as a clean, standalone within its sandbox app designed for researchers, writers, and students who need AI-enhanced knowledge workflows without distraction or data loss.

Privacy Policy Summary https://gist.githubusercontent.com/Apetrillo99/5269642e457597cfce9f4a0eafff0357/raw/5812e10c0c373d3d9059e876a6734d8a60ea4a62/Privacy-Policy

Lexicon OS does not collect or transmit any user data.
All messages, notes, citations, and projects are stored locally.
The app uses OpenAI, Wikipedia, Semantic Scholar, and CrossRef strictly for research tasks triggered by the user. No analytics, ads, or external tracking are used.
Your OpenAI API key is stored only on your device and required for user generated AI summaries.