Lock Hide Note, Health & AI Prompt Manager.
The zero-knowledge companion with authenticated XChaCha20-Poly1305 encryption, instant SQLite speed, offline vitals & cycle tracking, and AI prompt wizard. Zero tracking. Zero cloud lock-in.
Private Notes
Private Notes
Lightning-fast note-taking with color coding, pin priority, custom tags, instant search, and zero cloud dependency. Stored locally in a secure SQLite database.
Private Notes with Multiple Vaults
Every key opens its own notebook. Color labels, instant search, home screen widgets, and offline encryption.
Vault Access & Encryption That Doesn't Cut Corners
Unlike cloud-based note apps where employees or hackers can access unencrypted servers, ODude Note implements true mathematical isolation.
XChaCha20-Poly1305 AEAD
Authenticated 256-bit stream cipher encryption with a 192-bit extended nonce, preventing nonce-reuse vulnerability. Your notes are mathematically impossible to decrypt without your secret passphrase.
Hardware SHA-256 Key Derivation
Every vault lock derives its key using cryptographically secure 32-byte salts and native SHA-256 hashing. Passphrases are never stored in plaintext.
Zero-Knowledge Architecture
Neither ODude, nor Apple, nor any cloud provider has your decryption keys. If you lose your lock credentials, nobody can access your notes.
100% On-Device SQLite Database
All your standard and vaulted notes are stored in a high-performance local SQLite database on your physical device. No remote database sync forced upon you.
Private Google Drive Backup
You can optionally link your own personal Google Drive account. Backups are encrypted before leaving your device, remaining completely unreadable to cloud providers.
Zero Analytics & Zero Tracking
No third-party trackers, no crash analytics logging your keystrokes, no behavioral tracking. Full respect for your digital sovereignty.
No account creation is required to use ODude Note. You retain 100% control over your data. Wipe, export, or permanently erase all vaults instantly within the app at any time.
Your Health Records Stay 100% Private
Health data is the most sensitive information you own. ODude Note gives you a comprehensive health tracker that never sells your medical history to advertising brokers.
Blood Pressure & Pulse
Record Systolic, Diastolic, and Pulse readings. Automatic AHA classification (Normal, Elevated, Stage 1, Stage 2).
Blood Sugar (Glucose)
Log Fasting, Pre-Meal, Post-Meal, and Bedtime blood sugar with custom units (mg/dL or mmol/L).
Menstrual & Period Tracking
Private cycle forecasting, symptom tracking, flow intensity, and cycle history stored 100% locally.
Body Temperature
Monitor fever trends during illnesses with Celsius and Fahrenheit support and precise timestamps.
Weight & Body Metrics
Keep track of weight fluctuations and fitness progress over days, weeks, and months.
Doctor Report Generation
Export clean CSV and PDF health logs ready to show your physician during clinical consultations.
AI Prompt Vault & Execution Wizard
Never retype complex system prompts again. Save, categorize, and execute prompts with dynamic placeholders right beside your private notes.
Save Reusable Templates
Store your top prompts for ChatGPT, Claude, Gemini, or Midjourney with variable tags like {{role}}, {{topic}}, and {{tone}}.
Automatic Placeholder Detection
ODude Note automatically detects your double curly bracket variables and builds a dynamic form.
Run Wizard & 1-Tap Copy
Fill in your variables in seconds, preview the finalized prompt with instant substitution, and copy to clipboard.
Act as an expert {{role}}. Analyze the following {{topic}} and provide a concise action plan in a {{tone}} voice.
Frequently Asked Questions
Everything you need to know about ODude Note's security model, backups, and data policies.
All your notes, vaults, and health records are stored directly on your physical device in an optimized SQLite database. ODude Note has zero central servers storing your content.
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