Nudge — Offline Journal & Diary with AI Companion
"Your thoughts belong to you — not the cloud."
Nudge is an intimate, distraction-free desktop journal built natively for Windows. It unites the absolute digital sovereignty of local plain Markdown files with the quiet intelligence of an on-device AI companion that never connects to the internet. No recurring subscriptions, no telemetry, no tracking, and no cloud lock-in.
In an era where personal software has been transformed into a surveillance pipeline, Nudge represents a deliberate, principled return to first principles. Every single thought, sentence, and draft you write lives strictly on your personal machine as standard, human-readable Markdown (.md) files accompanied by clean YAML front matter. No proprietary blobs, no fragile databases.
The Three Invariant Pillars of Nudge
Our architectural invariants: complete offline privacy, quiet reflection, and human compassion.
True Offline Sovereignty
Complete privacy is not a marketing checkbox; it is an architectural invariant. Nudge executes zero runtime network requests. There are no analytics pings, no crash reporters phoning home, no remote font downloads, and no background token exchanges. Your storage root is an ordinary folder on your hard drive under your direct custody.
Quiet On-Device AI Companion
Artificial intelligence should serve human introspection, not colonize attention. Nudge runs optimized quantized language models directly on local silicon (CPU, DirectML GPU, or Copilot+ NPU). The AI does not judge, psychoanalyze, prescribe, or simulate affection; it reflects your own words back to you, sparks deeper inquiry, and synthesizes long-term patterns with mathematical privacy.
Compassionate, Shame-Free Analytics
Traditional productivity software uses gamification to induce anxiety: broken streaks, aggressive red badges, and guilt-inducing alerts. Nudge reimagines journaling analytics through the lens of human compassion: generous grace-day streaks, celebrating the return after breaks, honest median word counts, and interactive thematic wheels.
Product Matrix & Technical Specifications
Rigorous architectural guarantees designed for 50-year longevity and sub-150ms performance.
| Dimension | Specification | Architectural Guarantees |
|---|---|---|
| Operating System | Windows 10 / Windows 11 | Built natively on modern WinUI 3 and Windows App SDK; full Mica & Acrylic support. |
| Runtime Purity | 100% Air-Gapped Offline | Zero network calls at runtime; zero background telemetry, crash beacons, or remote font loads. |
| Storage Architecture | File-System Markdown (.md) | Atomic write protocol; human-readable YAML front matter; zero proprietary database layer. |
| Search Engine | Local In-Memory BM25 | Sub-150ms full-text retrieval across 10,000+ entries with prefix & morphological expansion. |
| AI Companion Runtime | On-Device SLM (DirectML / CPU / NPU) | Local inference via ONNX Runtime GenAI & LlamaSharp; zero tokens sent to external servers. |
| Launch Performance | < 1.5 Seconds to Caret | Cold launch directly into active typing surface; background index loading and lazy AI weights. |
| Security & Locking | Windows Hello Biometrics | Facial recognition, fingerprint sensor, PIN; optional AES-256-GCM filesystem encryption with Argon2id. |
| Writing Experience | Distraction-Free Deep Work | F11 full-screen focus, typewriter scrolling, dimmed paragraph focus, custom typography. |
| Global Access | Quick-Capture Overlay | Global hotkey (Win+Alt+N) pops up lightweight note-taking surface in under 200ms. |
| Multilingual Engine | 50+ Natively Shipped Locales | CLDR plural engine, script detection, grapheme-cluster awareness, native Right-to-Left (RTL). |
| Data Interoperability | Universal Import & Export | Imports Day One JSON, Journey, Diarium, Markdown; exports PDF books, ZIP archives, HTML, EPUB. |
| Licensing Model | Transparent Buy-Once | 15-day unrestricted free trial; single $0.99 USD lifetime purchase; zero subscriptions; fail-open guarantee. |
The Manifesto: Why We Built Nudge
The crisis of modern cloud journals, the right to epistemic privacy, and the 50-Year Test.
The Crisis of the Modern Journal
Over the past fifteen years, the transition from local personal computing to centralized SaaS has transformed private diaries into surveillance pipelines: cloud databases accessible to third-party engineers, intimate confessions packaged into JSON payloads for remote AI APIs, monthly paywalls holding personal memories hostage, and proprietary binary blobs making migration painful or impossible.
The Principle of Epistemic Privacy
We believe an individual's private inner dialogue represents the sacred core of human consciousness. Epistemic privacy is the freedom to explore half-formed ideas, express difficult emotions, question beliefs, and document life without the chilling effect of external observation. The only true guarantee of privacy is physical and architectural impossibility: if an application has no network permissions, it cannot leak your diary.
The Digital Longevity Principle: The 50-Year Test
Will you or your children be able to read today's entry fifty years from now? Proprietary word processors and closed database formats of the past are now inaccessible digital wreckage. Plain text in UTF-8 Markdown is eternal. It will remain instantly readable in 2076 on any computing platform humanity invents.
Core Architecture: The Zero-Cloud Technical Blueprint
Anatomy of an entry, atomic write safety, and disposable index caches.
The File System as Database: Anatomy of an Entry
Nudge eliminates the database layer completely. Entries are saved as individual Markdown files organized chronologically by year and month. Filenames utilize ULID (Universally Unique Lexicographically Sortable Identifier) ensuring millisecond precision, chronological ordering, and collision-free synchronization.
Journal/
└── 2026/
└── 03-March/
├── 2026-03-15-01JN9Z8K7P3QW9E1R4T6Y8U2I0.md
└── 2026-03-16-01JN9ZB2M4X7V1A8C3D5E6F7G8.mdAtomic Writes, Draft Debouncing & Conflict Safety
Every keystroke is debounced to a .draft.md file every 500ms for instant crash recovery. Full saves write to temporary sidecars (.tmp) before atomic filesystem replacement. A debounced FileSystemWatcher detects external edits from Obsidian or VS Code, and forks simultaneous edits into safe sibling files (.conflict.md) without data loss.
Sub-150ms In-Memory BM25 & Disposable Cache
Searches populate in real time across 10,000+ entries using an in-memory inverted index and BM25 relevance scoring with Turkish-aware and grapheme-sensitive folding. The .cache/index.bin snapshot loads cold launches in <1.5s. Deleting the .cache directory loses nothing but time: every single metric, theme score, and index is 100% reconstructible from the raw Markdown files.
The On-Device AI Companion: Deep-Dive
A quiet intellectual mirror that never interrupts, never gives advice, and runs 100% locally.
An Intellectual Mirror, Not a Chatbot
In Nudge, you are the author; the AI is the mirror. It never gives unsolicited advice, never diagnoses psychological conditions, never interrupts your typing flow, and strictly detects and responds in your natural language and script.
The Starter (Blank Page)
A quiet, contextual prompt based on day of the week, time of day, and recent entry tags. If the AI is offline, Nudge uses a rich localized bank of curated reflective questions. Dissolves the instant you begin typing.
The Inline Nudge (6-Second Heuristic)
A soft, translucent question floating below your paragraph only when you pause for at least 6 seconds after writing at least 40 words. Pauses during IME composition (CJK). Dissolves immediately on your next keystroke. Maximum 2 per session.
The Deepen (Post-Entry)
Two or three thoughtful follow-up questions examining emotional subtext or unexplored assumptions. Tapping appends a clean Markdown sub-heading (### Follow-up) directly into your text with your cursor ready beneath it.
Offline Sunday Weekly Recap
Every Sunday, the on-device AI synthesizes a beautiful, structured briefing of your week: the central narrative, recurring threads, emotional shifts, and two forward-looking questions for the week ahead. All synthesized on local silicon without a single byte leaving your PC.
"Ask Your Journal": Cited Natural Language Retrieval
Ask conceptual questions like "When did I first think about switching careers?" Nudge retrieves relevant entries with BM25, and the local SLM synthesizes a coherent answer with mandatory clickable citation links. If nothing is found, it states "I couldn't find anything in your journal about that"—mathematically constrained against hallucination.
The Mindful Psychology of Metrics: No Guilt, No Shame
Habits measured with human empathy rather than toxic gamification.
Streaks with Built-in Grace Days
Life happens. Missing a day should not induce shame or reset months of dedication. Nudge incorporates automatic grace days: skipping a day preserves your momentum. Our codebase includes a unit test ensuring no 'days missed' or penalty metrics can ever render in red.
Celebrating the Return-After-Break
Instead of penalizing absences, Nudge tracks Return Rate—celebrating the resilience of returning to the page after life takes you away.
Median vs. Mean: Honest Writing Volume
Traditional averages are skewed by rare lengthy entries. Nudge uses the statistical median to represent your true typical session, free from distortion.
The 11 Locked Life Themes & ThemeWheels
Entries are classified across 11 universal, fixed human dimensions: Work, Relationships, Family, Health, Money, Identity, Creativity, Learning, Travel, Everyday, and Plans. Visualized on vector donut charts over 30 days, 90 days, 1 year, and all-time views.
The Writing Environment: Crafted for Deep Work
Sub-1.5s cold launch, fine stationery aesthetics, and distraction-free ergonomics.
Sub-1.5 Second Cold Launch
Native WinUI 3 and C# on .NET ensure that clicking Nudge brings you directly to an active blinking cursor on today's entry in under 1.5 seconds. Indexing and AI initialization are deferred to background threads.
Fine Stationery Design Palette
Inspired by fine bookbinding: Ink (archival pen ink typography), Paper (heavy Japanese linen editor surface), Surround (leather bound chrome), Lamp (warm focus accents), Whisper (margin counts), and Hairline dividers.
Immersive Focus Modes (F11)
Full-Screen Immersive Focus (F11) strips away all chrome; Typewriter Scrolling centers your active line vertically; Dimmed Paragraph Focus gently fades peripheral text to illuminate only your current thought.
Global Quick Capture in < 200ms
Press Win+Alt+N anywhere in Windows. A lightweight card floats instantly onto your screen. Type your realization, hit Ctrl+Enter, and it appends timestamped into today's daily entry without interrupting your flow.
Security, Biometrics & Data Sovereignty
Local biometrics, optional filesystem encryption, and universal migration freedom.
Windows Hello Biometrics
Unlock with Facial Recognition, Fingerprint Sensor, or secure Windows PIN. Configurable auto-lock after 1, 5, or 15 minutes of inactivity or when minimized.
Optional Local AES-256-GCM Encryption
Military-grade AES-256 in Galois/Counter Mode derived with Argon2id password hashing. Zero corporate backdoors or escrow keys.
Screen-Share Obscuration & Panic Key
DWM display affinity obscures Nudge's window on Zoom, Teams, or screen recordings. Pressing Esc twice instantly minimizes, clears memory, and locks.
Frictionless Migration In
Built-in importers for Day One JSON, Journey, Diarium, Obsidian vaults, and CSV archives—preserving timestamps, weather, and tags.
Universal Freedom to Walk Away
Export your entire journal anytime as Markdown ZIP archives, heirloom-quality printable PDF Keepsake Books with drop caps, standalone HTML portfolios, or EPUB ebooks.
How Nudge Compares: The Definitive Product Matrix
Comparing Nudge against Day One, Obsidian, Notion, and commercial AI chatbots.
| Feature / Attribute | Nudge | Day One | Obsidian | Notion | AI Chatbots |
|---|---|---|---|---|---|
| Storage Format | Plain Markdown (.md) | Proprietary Cloud DB | Plain Markdown | Cloud Database | Cloud Ephemeral |
| Native Windows App | Yes (WinUI 3 Native) | No (Web Wrapper) | Yes (Electron) | No (Electron) | Web / App |
| Network Activity | 0% Air-Gapped | Continuous Sync | Plugin Dependent | Mandatory Cloud | 100% Cloud API |
| AI Companion | 100% Local On-Device | Cloud API Pipeline | Community Cloud API | Cloud AI Sub | Commercial Model |
| User Account | None (Zero Login) | Mandatory Account | None | Mandatory Account | Mandatory Login |
| Cold Launch to Caret | < 1.5 Seconds | ~4-8 Seconds | ~3-6 Seconds | ~5-12 Seconds | Variable Web |
| Shame-Free Streaks | Grace-Day Protection | Rigid Daily Counter | Plugin Dependent | None | None |
| Search Performance | <150ms Local BM25 | Server Dependent | Fast Local | Server Lag | Search Ephemeral |
| Biometric Locking | Windows Hello Native | PIN / Cloud Pass | Third-Party Plugin | None | None |
| Pricing Model | $0.99 One-Time Buy | $34.99 / Year Sub | Free / Sync Sub | $10+ / Month Sub | Free / $20 Sub |
| Vendor Lock-in | Zero (Open Files) | High (Export Hassle) | Zero | Total Lock-in | Total Lock-in |
Five Master Daily Workflows
How writers, nomads, and deep thinkers integrate Nudge into their daily rhythms.
The Morning Clarity Ritual
Cold launch Nudge (<1.5s). Reflect on the contextual AI starter prompt. Write 200–400 words of stream-of-consciousness mental clearance, capture vivid dreams, and set two grounded emotional intentions for the day.
The Evening Decompression
Press F11 for full-screen focus in warm charcoal dark mode. Discharge cognitive load from tough meetings. A gentle inline nudge prompts: "What part was within your control?" Conclude with follow-up deepen prompts.
The Sunday Strategic Synthesis
Review the AI-generated weekly briefing. Examine the 30-day ThemeWheel to notice if creative reflections shrank while work expanded. Realign priorities and set forward-looking intentions for Monday.
The Off-Grid Nomad
100% offline functionality with zero connectivity errors. The on-device SLM generates prompts and recaps. Drag the journal folder to an encrypted flash drive for an instant physical backup.
The Creative & Academic Scratchpad
Press Win+Alt+N to trigger global quick capture in <200ms during deep work. Notes append seamlessly with timestamps. Link the journal folder into Obsidian vaults for zero-sync knowledge graph integration.
Hardware Tiers & Computational Efficiency
Native execution across x64 and ARM64 Copilot+ PCs with strict RAM and battery budgets.
Tier 1: Pure CPU (Universal)
Any modern x64 / ARM64 processor, 8 GB RAM, Intel Core / AMD Ryzen / Snapdragon.
Full journal capability, sub-150ms BM25 search, curated deterministic prompt banks, CPU INT4 AI inference.
Tier 2: DirectML GPU (Accelerated)
Intel Iris Xe, AMD Radeon, NVIDIA GTX/RTX dedicated or integrated graphics.
Blazing fast local AI companion inference with sub-2 second first-token generation.
Tier 3: Copilot+ NPU (Next-Gen AI PC)
Qualcomm Snapdragon X Elite/Plus, Intel Core Ultra NPU, AMD Ryzen AI.
Dedicated neural hardware inference with virtually zero fan noise, tiny battery impact, and instant response.
Windows 10 (Build 17763+) or Windows 11; x64 or ARM64; 8 GB RAM; 500 MB disk space (optional 2.5–4.5 GB for local AI weights).
Windows 11; modern multi-core Intel i7/Ryzen 7 or Snapdragon X; 16 GB RAM; DirectML GPU or NPU; NVMe SSD.
Transparent Licensing: The Anti-Subscription Contract
Pay once, own it forever. 15-day unrestricted trial with zero credit card required.
$0.00
Zero credit card required
100% of features unlocked, including the on-device AI runtime, BM25 search, all 50+ languages, ThemeWheels, and PDF book exports. No credit card required, zero automatic billing.
Download Free Trial$0.99 USD
Single one-time purchase • Pay once, own forever
A single one-time purchase with lifetime personal ownership. Includes all minor updates and regional purchasing power parity pricing across the Microsoft Store.
Buy Once — $0.99 LifetimeThe 'Fail-Open' Offline Guarantee
If an offline license check times out or fails while writing off-grid in an isolated cabin, Nudge fails open and grants full access. We will never lock you out of your private thoughts.
Permanent Read & Export Freedom
If your trial expires without purchase, Nudge transitions into a permanent read-only archive. You can browse, search with BM25, and export to Markdown or PDF forever. Your files remain open Markdown on your disk.
Frequently Asked Questions
Everything you need to know about privacy, local AI, storage, and licensing.
What Writers & Thinkers Say About Nudge
"Writing in Nudge feels like closing the door to a noisy street and sitting down in a sunlit private library. Knowing that my words are stored on my own hard drive and that no cloud server is reading my thoughts allows me to write with an honesty I haven't felt in fifteen years."
"The 6-second pause nudge is a masterclass in interaction design. It doesn't interrupt. It simply waits until you're genuinely stuck, offers a luminous question, and disappears the moment your fingers start moving again. It has transformed my evening journaling ritual."
"I was skeptical of local AI on a laptop until I tested Nudge on an airplane with Wi-Fi turned off. Having my past week's entries synthesized into a coherent narrative while flying over the Atlantic, with zero cloud connection, convinced me this is how software should be built."
Take Back Your Inner Life
In a digital world dominated by corporate cloud harvesting and perpetual subscriptions, your private thoughts are the last truly sacred frontier. Begin your 15-day free journey today.
100% Offline • Zero Telemetry • Plain Markdown Files • WinUI 3 for Windows 10 & 11
