Zero cloud.
Zero accounts.
Your vault lives only on your Android device. No registration, email or phone number, and vault data is never sent to a remote server.
- No registration
- No email or phone
- Works fully offline
Vault Zero - Password Manager
Android & Windows · Free · by Mohammad Azad
100% offline password manager
Your vault. Your device. Zero cloud.
Store website logins, app passwords, bank cards and private notes in one AES-256-GCM encrypted vault on your phone and PC, synced peer to peer over your own Wi-Fi. No account. No cloud database. Your vault, your privacy.
256-bit
AES-GCM encryption
100,000
PBKDF2 rounds
8
Languages
0
Accounts needed
Built for privacy
No account
No cloud database
AES-256-GCM
PBKDF2 × 100,000
Biometric unlock
Shuffle PIN keypad
Offline autofill
Encrypted .vault backups
Windows desktop app
Offline phone ↔ PC sync
8 languages & RTL
01 — The product
Cloud password managers ask you to trust their servers with your most sensitive data. Vault Zero takes the opposite approach: no account, no cloud database, nothing to breach. Your vault stays on your phone, encrypted, under your control.
No account
No sign-up, email or phone number.
No cloud database
Your vault never leaves your phone.
Nothing to breach
No central server holding your data.
What Vault Zero does
A free, offline-first password manager and encrypted personal vault for Android. It keeps website and app logins, bank cards, secure notes, secret keys and identity documents in one place, protected on your own device.
Why it stays offline
Cloud password managers ask you to trust their servers with your most sensitive data. Vault Zero takes the opposite approach: no online registration, no email or phone number, and no cloud database to breach. Your vault, your privacy.
How it’s built
Designed and developed end to end: on-device AES-256-GCM encryption with salted PBKDF2 key stretching, native Android autofill behind a biometric gate, adaptive system icons, and a fully localised interface in 8 languages with right-to-left layouts.
The problems it solves
“My passwords sit on a company’s server. One breach and they’re exposed.”
No cloud database
Your vault is encrypted with AES-256-GCM and never leaves your phone, so there is nothing central to breach.
“Every app wants my email or phone number before I can even start.”
No account at all
No registration, no email, no phone number. Install it and start saving.
“Autofill needs the internet and I can’t see where my data goes.”
Offline autofill
Native Android autofill that works 100% offline, and only after a biometric check.
“If I forget my master password, I’m locked out for good.”
A way back in
An Emergency Recovery Key is created by default, with optional security-question recovery.
“My backups are stuck inside one vendor’s cloud.”
Backups you own
Export password-protected .vault archives to your phone, a PC, a USB drive or an SD card.
02 — Features
Serious security, without the cloud.
Six reasons Vault Zero is different, told one screen at a time.
Zero cloud.
Military-grade
AES-256-GCM.
Passwords, cards and notes are protected with authenticated AES-256-GCM encryption. Master keys are derived on-device with 100,000 rounds of salted PBKDF2 key stretching.
- AES-256-GCM
- PBKDF2 × 100,000
- Keys derived on-device
Autofill that
never goes online.
Saved logins appear right above your keyboard, and new logins are captured as you sign in, with native app names and icons. A biometric check runs before anything is filled. Zero network requests.
- Keyboard autofill
- Smart auto-save
- Biometric gate
Passwords you'd
never guess.
Generate strong passwords and passphrases with custom length and character sets, then check the estimated brute-force crack time before you save.
Try it · generated in your browser
Hints that don't
give you away.
The Smart Hint analyzer checks password hints before you save them, and flags overlap or sensitive patterns that could expose a clue to your real password.
- Overlap detection
- Sensitive patterns
- Smart memory recall
Backups you
actually own.
Export and import password-protected .vault archives to local storage, a PC, a USB drive or an SD card. Standalone, encrypted, and never dependent on a cloud.
- .vault archives
- Password-protected
- PC, USB or SD card
Also inside
Biometrics & Shuffle PIN
Unlock with fingerprint, face or your master PIN. The randomised keypad rearranges its numbers to stop shoulder-surfing in public.
Emergency recovery key · example
K7QM-X2PD-9HRT-4WNB
16 characters · on by default
Emergency Recovery Key
Generated by default so you can get back in if you forget your PIN. Security-question recovery is available as an optional extra layer.
Secure Offline P2P Transfer
Move credentials between your trusted devices with time-limited encrypted codes, without any server in between.
03 — Desktop app
Now on your Windows desktop.
The same zero-cloud vault, rebuilt for a keyboard and a big screen. Your passwords are encrypted in a local database on your PC, and nothing is sent to a server.
- Windows
- Works offline
- Syncs with Android
Global Quick Capture
Press Ctrl+Shift+S anywhere in Windows, even in a game, to save a login without opening the app. The copied password can be wiped from the clipboard after saving.
Windows Hello unlock
Open the vault with your fingerprint, face or PIN through Windows Hello, or use a 4- or 6-digit PIN or a master password.
Encrypted share codes
Turn any credential into an AES-256-GCM transfer code locked with a 4-digit PIN. Send it over WhatsApp or email; only someone with the PIN can decrypt it in Vault Zero.
Desktop-grade protection
Inactivity auto-lock, clipboard auto-clear, and blocking of screenshots and screen recording keep the vault private on a shared or busy desk.
Backups & recovery kit
Export encrypted .vault backups with backup reminders, and save your 16-character Emergency Recovery Key as a PDF kit.
Guided from first launch
A five-step onboarding and an in-app tour explain encryption, recovery, backups and sync before you save your first password.
04 — Phone ↔ PC sync
One vault on every device. Zero cloud between them.
Vault Zero syncs your Android phone and Windows PC directly over your own Wi-Fi. Scan one QR code and encrypted records travel device to device, peer to peer. No server, no account, no internet.
Records synced0
CipherAES-256-GCM
RouteLocal Wi-Fi
Cloud servers0
How to connect
Set up once, guided step by step.
The Android app walks you through linking your PC, right inside Settings.
Built-in safeguards
Trusted networks only
Sync runs on private home or office Wi-Fi, or your own hotspot. On public networks the firewall keeps it blocked.
Mutual 6-digit check
Both devices confirm each other with fresh codes before any data moves, so no one in between can join.
Sync-level access PIN
Optionally require a separate PIN before anyone can view credentials received through sync.
Auto-disconnect
The session wipes itself after a set time, 5 minutes by default, and you can kill it at any time.
You decide on duplicates
Skip existing items, overwrite them, or keep both copies. Nothing is merged without your choice.
Device history
See which devices have linked to your vault, so an unknown one stands out.
05 — Zero-knowledge architecture
How your vault stays private.
From the moment you unlock to the moment a record is saved, every step happens on your phone.
-
01.
Unlock
Master PIN, fingerprint or face, verified locally by Android.
-
02.
Derive
Your key is stretched on-device with 100,000 rounds of salted PBKDF2.
-
03.
Encrypt
Every record is sealed with authenticated AES-256-GCM.
-
04.
Store
The encrypted vault stays in local storage on your phone. Nowhere else.
vault-zero · encryption pipeline
Illustration
› input
netflix.com · MyS3cret!Pass
› unlock
fingerprint · verified on-device ✓
› derive
PBKDF2 · salted · 100,000 rounds
› encrypt
AES-256-GCM → c29a7f1e b84d0e6a 93f2d1c7 5ab04e18
› store
vault · local storage only ✓
Never leaves your device
- Passwords, usernames and logins
- Bank cards, secure notes and secret keys
- Your master PIN, recovery answers and encryption keys
- Biometric data, which the app never reads or stores
What uses the network
- Google AdMob ads, which keep the app free
- Anonymous crash and stability analytics, which you can turn off in Settings
- Push notifications about updates and security advisories
06 — Your vault
What you can store
Website & app logins
Passwords, usernames and email logins
Credit & debit cards
Secure bank card storage
Secure notes & secret keys
Confidential notes and API keys
Speaks English العربية اردو हिन्दी বাংলা Español Français Deutsch
A fully localised interface in eight languages, with right-to-left layouts for Arabic and Urdu.
English
English
العربية
Arabic · RTL
اردو
Urdu · RTL
हिन्दी
Hindi
বাংলা
Bengali
Español
Spanish
Français
French
Deutsch
German
07 — Latest release
What's new
Updated Nov 7, 2026-
01.
Vault Zero for Windows
A desktop app with Windows Hello unlock, a global Quick Capture hotkey and encrypted share codes.
-
02.
Offline phone ↔ PC sync
Pair by QR code and sync the vault directly over your own Wi-Fi, encrypted, with no server in between.
-
03.
100% offline Android autofill
Seamless autofill for apps and websites with zero internet access.
-
04.
Biometric autofill gate
Instant biometric verification before credentials are filled.
-
05.
Smart auto-save
Captures app and web logins automatically, with native app names and icons.
-
06.
Native UI
Clean save dialogs with a "100% Offline & Encrypted" security badge.
-
07.
Adaptive system icons
Symmetrical adaptive icons across Xiaomi, Samsung, Pixel and other Android devices.
-
08.
Performance & bug fixes
Faster, smoother and more reliable everywhere.
Download
Private password storage, without cloud risks.
Your offline password manager and encrypted personal vault for Android and Windows, synced peer to peer without a cloud.
- No online account or registration
- 100% offline-first credential storage
- AES-256-GCM authenticated encryption
- Keyboard autofill & smart auto-save
- Emergency Recovery Key by default
- Optional security question recovery
- Password generator & crack-time analysis
- Encrypted local backups & restore
- Secure offline peer-to-peer transfer
- Windows desktop app
- Offline Wi-Fi sync between phone & PC
- 8 languages with full RTL support
08 — The maker
One person. Idea to Play Store.
I designed, engineered and shipped Vault Zero single-handedly, with AI as my development partner (Antigravity). Research, UX, UI, front-end and release, end to end.
Mohammad Azad · Senior UI/UX Designer, Product Designer, UI Developer and UI Engineer
13+
Years across UI/UX, product design and UI engineering
4
Roles in one: UI/UX, product, UI development, UI engineering
1
Person who designed, built and shipped this app, AI-assisted
8
Languages shipped, with full right-to-left support
Why I built Vault Zero
Chapter 01 / 04
Keeping logins safe was hard
As a user, I found it genuinely difficult to store my login details somewhere that was actually secure.