Buyout price
$110,000 USD — Acquire NoteVault
A live, fully built Android privacy app — ready for a new owner to grow.
ZeengoCorp Innovations is offering NoteVault for complete commercial buyout. The asset transfer includes 100% source code ownership, the official Play Store listing (com.zeengocorp.notevault28), SQLCipher database architecture, the AdMob monetization engine, and complete brand IP.
NoteVault looks like an ordinary notepad. Behind it sits an encrypted vault for private photos, videos and files, opened by a secret word typed into the notes search bar. Notes and private files stay on the phone: no accounts, no servers, no cloud storage.
Why NoteVault
Live and earning-ready today
Published on Google Play and Samsung Galaxy Store, with version 3.4.0 released in September 2026. Nothing left to build before you can grow it.
No servers, no hosting bills
Notes and vault files never leave the user's phone — no backend to run, no database to breach, no cloud storage to pay for.
A concept that stands out
Not a fake calculator. NoteVault is a genuinely useful notepad with the vault hidden behind a secret word — a real story to market in a crowded category.
Monetization already built in
AdMob real-time bidding across four ad networks, a premium subscription wired for Google Play, Samsung and Xiaomi billing, and rewarded ads. A new owner adds traffic, not code.
Global from day one
13 languages including right-to-left Arabic, with store listing copy for each, and four store editions built from one codebase.
Light and fast
About a 26–28 MB download per phone, opening in roughly 1 second on a budget phone (measured on the 3.4.0 release build).
What's included
Full source code & architecture ownership
The complete Flutter and Kotlin repository with commit history and automated test suite, plus the release build and signing setup.
Play Store & multi-store listings transfer
The Google Play listing (com.zeengocorp.notevault28) and the Samsung Galaxy Store listing, plus ready-to-build Xiaomi GetApps and vivo App Store editions.
13 pre-translated languages & RTL Arabic
Every in-app screen and the store listing copy in all 13 languages.
Direct technical handover from ZeengoCorp
The app signing upload key, the Firebase project (Analytics, Crashlytics, Remote Config, Cloud Messaging), the AdMob mediation setup, and 30 days of email support after transfer.
Complete brand IP
The NoteVault name, app icon, store listing assets and marketing copy.
The mynotevault.in domain
NoteVault's dedicated domain, transferred with the app — so the brand has its own home on day one instead of living under ZeengoCorp.
New in version 3.4.0 (September 2026)
- Encrypted file transfer — lock chosen files into one passphrase-protected file, keep it anywhere (Drive, USB, email), and open it again only in NoteVault.
- Redesigned first-run onboarding with an in-app language picker on the welcome screen.
- Help & Support page with contact, bug reporting and ad-privacy choices.
- Cancel anytime — every long import, export, backup and restore can be cancelled without leaving half-finished files.
- Recovery-kit reminders, so users save their recovery details before they need them.
- Smaller, faster release builds with obfuscated code, which also makes the app harder to copy.
Product features
Disguise & access
- Fully working notepad: notes, checklists, colors, labels, pinning and archive
- Hidden vault opened by a secret word in the search bar — no lock icon to give it away
- Multiple vaults, each with its own password and files
- Fingerprint unlock, vault PIN or pattern, and an optional lock for the notepad itself
- Intruder photo taken after wrong password attempts
Private files
- Hide photos, videos, documents and whole folders; originals removed from the gallery after import
- Private in-vault camera: photos never touch the gallery
- Built-in photo and PDF viewing
- Recently-deleted bin with 30-day restore
- Large imports keep running in the background with a progress notification
Safety & recovery
- Recovery code plus a printable recovery kit (PDF)
- Encrypted full-vault backup and restore
- Encrypted file transfer between phones or to any storage
Experience
- Guided onboarding and in-app feature tours
- Home-screen widgets: pinned note and Quick Tasks
- 13 languages, including right-to-left Arabic
Technology & quality
- Built with Flutter: one codebase for four store editions; runs on Android 7.0+ and targets Android 16 (API 36).
- Encryption: AES-256 for vault files, SQLCipher-encrypted databases, and PBKDF2-HMAC-SHA256 key derivation (100,000 iterations) with separate keys per vault.
- Speed: hardware-accelerated native encryption, checked against a pure-Dart implementation every session, with automatic fallback.
- Encrypted transfer format: every file authenticated (HMAC-SHA256), file names hidden inside an encrypted manifest, and a fresh key per transfer.
- Safe updates: the vault file format is locked by an automated test against official NIST AES reference data, with built-in upgrade paths.
- Quality: 143 automated tests, Firebase Crashlytics crash reporting, and obfuscated release builds with symbols uploaded so reports stay readable.
Monetization
- AdMob with real-time bidding across Meta Audience Network, Unity Ads, Liftoff Monetize and BidMachine; banner, interstitial, app-open and rewarded formats.
- Privacy compliant: Google consent (UMP) for EEA and UK users, non-personalized ads support, and in-app ad-privacy choices.
- Premium subscription ($1.49/month) on Google Play, Samsung In-App Purchase and Xiaomi billing — removes ads and unlocks fingerprint unlock, vault PIN/pattern, app lock, backup & restore, intruder photo, and unlimited encrypted transfers.
- Rewarded ads unlock one hour of premium features.
- Ad-free vault by design: ads appear only in the notepad, never over private files.
Distribution
| Store | Status | Billing |
|---|---|---|
| Google Play | Live | Google Play Billing |
| Samsung Galaxy Store | Live | Samsung In-App Purchase |
| Xiaomi GetApps | Ready-to-build edition | Xiaomi billing |
| vivo App Store | Ready-to-build edition | Ads only, no in-app purchase |
All editions share the package name com.zeengocorp.notevault28. Live now on Google Play and Samsung Galaxy Store.
Growth levers ready for the new owner
- Remote Config switches: turn ad formats on/off, adjust frequency, show announcements, and prompt or require updates — all without a new release.
- Targeted push campaigns: built-in audiences for users on older versions and for non-premium users.
- In-app update prompts and a review prompt that appears after positive moments.
- What's-new screens and guided tours to introduce each new feature.
- 13-language store listing copy ready for store optimization in every market.
- Room to expand: the Flutter codebase makes an iOS edition a realistic next step.
Deal terms
- Price: $110,000 USD for the complete asset.
- Secure payment through an escrow service such as Escrow.com. Transfer starts once escrow is funded; funds release when the buyer confirms receipt.
- Due-diligence data (store metrics, analytics and revenue) shared within 48 hours of a signed mutual NDA.
- Transfers: Google Play app transfer, Galaxy Store listing transfer, source repository, app signing upload key and the Firebase project. Ad units switch to the buyer's AdMob account during handover.
- Support: 30 days of email support after the transfer.
How the acquisition works
- 1
Inquiry
Email or call the executive desk.
- 2
NDA & data
Sign a mutual NDA and receive the due-diligence pack within 48 hours.
- 3
Escrow
Agree terms and fund escrow.
- 4
Transfer & support
Listings, code, keys and accounts are handed over, followed by 30 days of email support.
Frequently Asked Questions
They are shared with serious buyers under NDA within 48 hours. Keeping them private is standard practice for app asset sales.
There are no servers or hosting bills. The Firebase products it uses (Analytics, Crashlytics, Remote Config, Cloud Messaging) are no-cost Firebase products. The buyer uses their own store developer accounts.
Yes. You own the brand and the source code, so the name, icon, colors and store listings can all change. Keep the package name (com.zeengocorp.notevault28) so existing users continue to receive updates.
A Google Play developer account and a Samsung seller account to receive the listings, a Google account for Firebase and AdMob, and a Flutter developer for future releases. ZeengoCorp's 30-day email support covers the first builds and releases.
No. Notes and vault files stay on the phone, and there are no user accounts. The analytics, crash-reporting and ad SDKs collect standard device data, as described in the store privacy disclosures.
Start the conversation
ZeengoCorp Innovations · contact@zeengocorp.com · +91 70112 60590
Prefer to see the product first? Visit the NoteVault product page.