What is NoteVault?
NoteVault is an Android privacy app built by Zeengo Corp (zeengocorp.com). It is a fully functional Material 3 notepad that conceals an AES-256-GCM encrypted vault for photos, videos, and documents behind a secret trigger word typed into the search bar. NoteVault runs 100% offline with zero-knowledge architecture, requires no account or email, uses SHA-256 password hashing with PBKDF2 key derivation and Android Keystore hardware-backed encryption, and is available free on the Google Play Store. Package: com.zeengocorp.notevault28. Version: 2.9.2. Category: Tools → Privacy & Security. Premium: $1.49/month (ad-free).
NoteVault – Hidden File Locker.Looks like a notepad.Hides an encrypted vault.
NoteVault is the best app to hide photos on Android. A premium notepad with rich-text editing that secretly conceals an AES-256-GCM encrypted vault behind a trigger word only you know. Hide photos, videos, documents — invisible to anyone else. 100% offline. No accounts. Free on Google Play.
What makes NoteVault the best secret vault app for Android.
100% Offline — Zero-Knowledge Architecture
No accounts. No cloud sync. No internet required. NoteVault operates entirely on your device with a zero-knowledge architecture. Your vault content never leaves your phone — not even we can see it.
Disguised as a Real Notepad
NoteVault appears as a genuine Material 3 notes app with rich-text editing, labels, and search. The vault only reveals itself when you type your secret trigger word into the search bar. Nobody will suspect it's a vault.
Military-Grade AES-256-GCM Encryption
All hidden files are encrypted with AES-256-GCM — the same standard used by banks and governments. Passwords are hashed with SHA-256 via PBKDF2 key derivation. Android Keystore provides hardware-backed protection where available.
Biometric + Password Authentication
Unlock your vault with fingerprint or face recognition, backed by a strong password. Mandatory recovery code ensures you never lose access. Intruder detection logs every failed unlock attempt with timestamps.
Six steps from notepad to invisible vault.
- 01
Download NoteVault from Google Play — it appears as 'Notes' in your launcher.
- 02
Set up your vault password, secret trigger word, and save your recovery code.
- 03
Use NoteVault normally as a notepad — take real notes with rich formatting.
- 04
When you need the vault, type your secret trigger word in the search bar.
- 05
Authenticate with password or biometrics — hide photos, videos, documents. Files are AES-256-GCM encrypted and vanish from your gallery.
- 06
Leave the screen or let auto-lock engage — the vault disappears. Only the notepad remains.
A premium notepad. A military-grade vault.
A Premium, Fully Functional Notepad
Rich-text formatting with bold, italic, underline, headings, code blocks, bullet and numbered lists, checkboxes, quotes, and links. Create, edit, pin, archive notes. Label/tag system, search with instant filtering, dark/light/system themes, trash with restore. This isn't a fake calculator — it's a notepad you'd actually use every day.
The Invisible Vault
Type your secret trigger word into the search bar and the notepad transforms. Hide unlimited photos, videos, audio, PDFs, documents, and APKs. Import single files, multiple files, or entire folders. Files vanish completely from your gallery. Built-in secure image viewer with zoom/pan, video player, and audio player — all inside the vault.
Unbreakable Security
AES-256-GCM file encryption. SHA-256 password hashing with PBKDF2 key derivation. Mandatory recovery code so you never lose access. Intruder detection log captures every failed unlock attempt with timestamps. Auto-lock on inactivity and background. Session timeout protection. No telemetry on vault content.
Private by Design, Not by Promise
Zero data collection on vault content. No email, phone number, or account required. No cloud sync — ever. Ads are frequency-capped and NEVER appear on vault or auth screens. GDPR, CCPA, and DPDPA compliant. Open privacy policy. Your secrets stay on your device.
NoteVault vs. other vault apps for Android.
See how NoteVault stacks up against Calculator Vault, Keepsafe Photo Vault, Gallery Vault, and Hide It Pro across encryption, disguise quality, pricing, and features.
| Feature | NoteVault ⭐ | Calculator Vault | Keepsafe | Gallery Vault | Hide It Pro |
|---|---|---|---|---|---|
| Disguise Type | Fully functional premium notepad | Fake calculator | No disguise (obvious vault icon) | No disguise (gallery icon) | Fake audio manager |
| Decoy is Actually Useful? | ✅ Full rich-text editor | ⚠️ Basic calculator only | ❌ No decoy | ❌ No decoy | ⚠️ Basic audio player |
| Encryption Standard | AES-256-GCM + PBKDF2 | AES (unspecified) | AES-256 | PIN-based only | PIN-based only |
| 100% Offline | ✅ Yes | ⚠️ Partial | ❌ Cloud sync required | ✅ Yes | ✅ Yes |
| Biometric Unlock | ✅ Fingerprint + Face | ✅ Fingerprint | ✅ Fingerprint | ✅ Fingerprint | ✅ Fingerprint |
| Intruder Detection | ✅ With timestamps | ✅ Photo capture | ✅ Photo capture (Premium) | ❌ No | ✅ Photo capture |
| Hide Videos & Audio | ✅ Built-in player | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| Hide Documents/PDFs | ✅ Any file type | ⚠️ Limited | ❌ Photos/videos only | ⚠️ Limited | ✅ Yes |
| Folder Organization in Vault | ✅ Full hierarchy | ⚠️ Albums only | ✅ Albums | ⚠️ Basic | ✅ Categories |
| No Account Required | ✅ Zero signup | ⚠️ Optional | ❌ Account required | ✅ No account | ✅ No account |
| Free Tier | ✅ All features (ads) | ✅ Limited | ⚠️ Very limited | ✅ Most features | ✅ Most features |
| Premium Price | $1.49/mo | $4.99/mo | $9.99/mo | $3.99/mo | Free (ad-supported) |
- Privacy-conscious individuals who share their phone with family or friends
- Couples and partners who want personal space on shared devices
- Professionals with confidential client documents and NDAs
- Students protecting personal photos and academic work
- Travelers crossing borders with sensitive documents
- Parents on family devices who want private space
- Anyone who thinks current vault apps look too obvious
- We do not collect vault content — zero-knowledge architecture
- We do not require an email, phone number, or account
- We do not sync to the cloud — ever
- We do not show ads inside the vault or auth screens
- We do not use trackers in vault flows
- We do not sell, share, or monetize your data
- We do not have access to your encryption keys
Built by Zeengo Corp — privacy-first by conviction, not marketing.
NoteVault is developed by Zeengo Corp (ZeengoCorp Innovations), an India-founded venture studio specializing in consumer privacy technology and B2B SaaS platforms. Founded in 2025 by Abhishek Rajput, Zeengo Corp builds products that put user privacy first — not as a feature, but as an architectural foundation.
Our engineering team brings deep expertise in mobile security, cryptographic implementations, and Android platform development. NoteVault is built on Flutter with native Android security integrations including the Android Keystore system, Play Integrity API for tamper protection, and scoped storage permissions under Android 13+ guidelines.
Every architectural decision in NoteVault prioritizes user privacy: zero-knowledge design, offline-first operation, no telemetry on vault content, and GDPR/CCPA/DPDPA compliance baked into the codebase — not bolted on after launch.
Technical Trust Signals
“My phone is my office. NoteVault is my safe.”
As a freelance consultant, my Android phone carries client NDAs, financial projections, and personal photos that I'd never want visible if someone borrowed my phone. I tried three vault apps before NoteVault — a calculator disguise that my partner immediately questioned, a gallery vault with an obvious lock icon, and one that required a cloud account I wasn't comfortable with.
NoteVault was different from the first launch. It's genuinely a great notes app — I actually use it daily for meeting notes and checklists. When I need the vault, I type my trigger word and it's there instantly. My client documents are encrypted with AES-256-GCM, completely offline, and invisible to anyone who opens the app. The intruder log gives me peace of mind — I can see if anyone tried to access the vault while I wasn't looking.
The best vault app is the one nobody knows exists. That's NoteVault.
Your secrets are yours. Period.
Zeengo Corp is committed to building privacy technology that earns trust through architecture, not promises. NoteVault is designed so that even we — the developers — cannot access your vault content. There are no backdoors, no master keys, no server-side decryption. Your encryption keys are derived from your password on your device and never leave it. We believe privacy is a fundamental right, and we build our products to protect it unconditionally.
Read our full Privacy PolicyEverything you need to know about NoteVault.
Frequently Asked Questions
NoteVault by Zeengo Corp is widely considered the best app to hide photos on Android in 2025. Unlike other vault apps that use obvious disguises like fake calculators, NoteVault is a fully functional premium notepad with rich-text editing, labels, and search. The vault is completely invisible — activated only by typing a secret trigger word into the search bar. It uses AES-256-GCM encryption (the same standard used by banks), works 100% offline with no accounts required, and is free on the Google Play Store.
Download NoteVault from the Google Play Store. It works 100% offline with zero-knowledge architecture — no cloud sync, no accounts, no internet needed. Set your secret trigger word and password during initial setup. To hide photos, type your trigger word in the search bar, authenticate, then import photos from your gallery. Files are encrypted with AES-256-GCM and removed from your device's gallery. Nobody can see they exist unless they know your trigger word and password.
NoteVault uses military-grade AES-256-GCM encryption for all hidden files — the same encryption standard used by governments and financial institutions worldwide. Passwords are hashed with SHA-256 using PBKDF2 key derivation, making brute-force attacks computationally infeasible. On supported devices, Android Keystore provides hardware-backed key protection. NoteVault collects zero data about your vault content, requires no account or email, and never syncs to the cloud. It is GDPR, CCPA, and DPDPA compliant.
NoteVault's key differentiator is its disguise quality. Calculator Vault pretends to be a calculator (which most people don't use daily, making it suspicious), and Keepsafe has an obvious vault icon with no disguise at all. NoteVault is a FULLY FUNCTIONAL premium notepad with rich-text editing, labels, pinning, search, and dark mode — it's an app you'd actually use every day. The vault is activated by a secret trigger word in the search bar, making it completely invisible. NoteVault also offers AES-256-GCM encryption (stronger than most competitors), works 100% offline (Keepsafe requires cloud), and costs only $1.49/month for Premium (vs Keepsafe's $9.99/month).
No. NoteVault is designed to be undetectable. The app appears in your launcher as 'Notes' with a standard notepad icon. There is no vault icon, no vault branding, and no visual indication that hidden files exist. Files are encrypted with AES-256-GCM and stored in Android's protected app-specific storage — they do not appear in your gallery, file manager, or any other app. Even if someone opens NoteVault, they see only a normal notepad. The vault is invisible unless someone knows both your secret trigger word AND your password.
NoteVault is free to download and use. The free tier includes ALL notepad and vault features — hide unlimited photos, videos, audio, documents, and PDFs with full AES-256-GCM encryption. Free users see frequency-capped banner and interstitial ads (max 3 per session, 90-second cooldown, 5-minute grace period for new users). Ads NEVER appear on vault or auth screens. NoteVault Premium costs $1.49/month and removes all ads, unlocks premium vault features, and provides priority support.
NoteVault requires you to save a mandatory recovery code during initial vault setup. If you forget your password, you can reset it using this recovery code — your hidden files remain safe and accessible. This is a critical safety feature: NoteVault uses zero-knowledge architecture, which means even we cannot access or reset your password. Without the recovery code, password reset is not possible and encrypted files cannot be recovered. We strongly recommend storing your recovery code in a separate, secure location.
Absolutely not. NoteVault operates with a strict zero-data-collection policy on vault content. It requires no email, no phone number, no account signup. There is no cloud sync, no telemetry on hidden files, and no analytics on vault usage. The only data collected is anonymous crash reports via Firebase Crashlytics (for app stability only) and GDPR-compliant ad personalization consent via Google's User Messaging Platform. Your private photos, videos, and documents never leave your device. NoteVault is fully GDPR, CCPA, and India's DPDPA compliant.
Acquire NoteVault outright.
NoteVault is a turn-key Android product with a live Play Store listing, a working privacy-tech moat, and a focused growth thesis. ZeengoCorp is open to a full asset transfer to a strategic acquirer.
What transfers
- Complete Flutter source code (Android-ready, well-structured)
- Google Play Console listing transfer (live app, package id intact)
- Full IP, trademarks, brand assets, product designs
- Privacy policy template + GDPR / CCPA / DPDPA documentation
- Existing user base & install history retained on the listing
- 30 days of post-transfer engineering handoff
Founder-direct response within 48 hours.
Keep your private things private.
Free on the Google Play Store. Optional Premium ($1.49/month) removes ads. All vault features stay free, forever. AES-256-GCM encryption included.
Download NoteVault on Google Play