Fortnote: Safe Encrypted Notes

Nobel Future Systems Ltd

In-app purchases

About this app

Fortnote is a fully offline, privacy-first notes app designed to protect your thoughts, passwords, ideas and personal information with strong encryption, without sending anything to the cloud.
No account. No tracking. No ads. No data collection. Your notes stay fully private and stored only on your device.

Fortnote uses AES-256-GCM encryption with HMAC integrity verification and hardware-backed keys (StrongBox / Secure Enclave when available). Every note is encrypted before it is written to disk, ensuring your data cannot be accessed or tampered with.

Key Features:

• 100% Offline & Private:
Fortnote never connects to external servers. Your notes never leave your device, making it ideal for people who want maximum privacy.

• AES-256-GCM Encryption:
Each note is encrypted with modern authenticated encryption to protect against tampering or unauthorised access.

• Hardware-Backed Keys:
Supports StrongBox / Secure Enclave on compatible devices for even stronger security.

• Built-In Encryption Self-Test:
Run a real-time encryption demo to verify your device is securely protecting your notes.

• Clean & Minimal Interface:
A distraction-free writing experience designed for clarity and ease of use.

• Encrypted Backups:
Export encrypted backup files that only you can restore.

• Biometric Unlock:
Unlock your vault instantly using fingerprint or face authentication.

• Zero Permissions:
Fortnote requests no dangerous permissions — no internet, no contacts, no files access, and no background data. Your privacy stays intact by design.

Who is Fortnote for?

• People who want private, encrypted notes
• Anyone avoiding cloud-based note apps
• Users who dislike ads, analytics, or tracking
• Professionals storing sensitive information
• Anyone who values offline security

Your notes. Your device. Your privacy:

Fortnote was built with one rule: Your data should belong only to you.
Whether you are writing personal thoughts, saving passwords, storing documents or keeping sensitive information, Fortnote ensures everything stays fully encrypted and offline.

Try Fortnote today and experience encrypted offline notes done properly.

Ratings and reviews

I moved my notes from an old note app to this "encrypted offline" app. after 3 days this offline only app started to delete large sections of my notes. there's also no setting to report issues or bugs within the app because it's an "offline only app" but wait the app "will have full network access" view network connections" when it needs to, look at "about this app", scroll down to "app permissions see more". I would not recommend using this app. take this as a warning.

Very promising app with great privacy features! I'm looking forward to seeing where this goes, and I've enjoyed using it so far.

Strong encryption app for mobile devices.

What’s new

What’s new:
- New free users now have a note creation limit
- Existing users keep their current notes and receive an additional free-note allowance
- Editing existing notes does not count toward the limit
- Reading, editing, deleting, and managing existing notes still works as normal
- Premium users continue to get unlimited note creation

Also included:
- Stability-focused implementation to avoid regressions
- Smoother handling around new note creation limits
- General internal polish