The Most Secure Offline Vault
for Your Notes
AES-256-GCM, HMAC, offline-only, biometric unlock
Google Play
Coming soon on iOS
Built for Real People Who Value Privacy
Fortnote keeps your notes truly personal. Here’s how it protects them without compromise.
Stays Offline
The app never goes online. Your notes live only on your phone — not in the cloud and not on any server you can’t control. No accounts, no silent syncs, no surprises. Only you can access them.
Locked With Military-Grade Encryption
Every note is sealed with AES-256-GCM and verified with HMAC. In plain words: even if someone copied your files, they won't be able to read a single word without your encryption key.
Protected by Your Phone’s Hardware
Your encryption keys never leave the phone’s secure chip (Android Keystore/StrongBox where available). Pull the storage or break the device — the keys stay locked in hardware.
Quick Unlock
Open with fingerprint or face in a tap. If biometrics fail, your PIN or password is always there as a backup. Fast when you need it, strict when you don’t.
No Ads. No Trackers.
Fortnote doesn’t collect analytics, sell data, or track behavior. It’s a quiet app that does one job well — keeping your notes private.
Warns You About Risk
If the device looks rooted or jailbroken, you’ll see a clear warning. You decide whether to continue or step back — no guesswork.
You Choose When to Export
Back up on your terms. Exports are local and encrypted — no automatic uploads and no surprise syncs. You stay in control.
Rich-Text Notes
Write freely with headings, bold, lists, and checkboxes. All formatting — even the tick marks — is encrypted just like your text.
Fast & Lightweight
No bloat, no lag, and no background drains. Fortnote opens quickly and stays snappy — even on older phones.
Built-In Security Check
On every launch, the app self-tests its encryption and integrity. If anything is off, a vault status icon lets you know immediately. Stepping away from your phone? Fortnote can auto-lock or fully close after a time you choose. That way, your vault is never left open by accident.
How We Compare
| Capability | Fortnote | Typical Notes App |
|---|---|---|
| Default network access | None (offline-only) | Frequent background calls |
| Data location | On-device only | Cloud account by default |
| Encryption | AES-256-GCM per note | Varies; often “at rest” only |
| Integrity checks | HMAC authentication | Varies / not guaranteed |
| Key storage | Android Keystore; StrongBox when available | App-managed or device lock only |
| Biometric unlock | Yes (with PIN fallback) | Usually |
| Trackers/Telemetry | None | Common (analytics, crash reports) |
| Tamper awareness | Root/JB detection with warnings | Rare |
| Exports | Manual, local, encrypted | Cloud export/sync by default |
| Crypto self-test | Yes (AES-GCM + HMAC) | No / uncommon |
| Rich-text support | Yes (encrypted) | Varies |
Get launch updates
No spam. Just a short note when Fortnote ships and big updates land.
FAQ
Privacy Policy
Effective date: 22 August 2025
Fortnote is built to keep your data safe and private. Everything happens on your device—your notes never leave it.
What we collect
- We do not collect or track any personal information inside the app.
- If you sign up for release updates on our website, we store your email for that purpose only.
How your notes are protected
Notes are encrypted with AES-256-GCM and verified with HMAC for integrity. Keys are unique to each installation and secured in the Android Keystore (hardware-backed when supported). Biometric unlock is supported.
Exports
By default, your notes remain locked inside Fortnote. If you export them, you are responsible for safeguarding the exported files.
Contact
General questions: privacy@fortnote.app
Security issues: security@fortnote.app