Privacy Policy

Effective date: September 19, 2026

This Privacy Policy explains how NKA BillBook ("the App", "we", "our") handles information when you use our Android application, published under the package name com.naveen.billbook. We built this App to run primarily on your own device, and this policy reflects that — most of your data never leaves your phone.

1. Summary — the short version

• Your business data (parties, bills, items, transactions) is stored locally on your device, not on our servers — we don't operate a server that stores your business records.

• We don't sell your data, and we don't share it with advertisers.

• If you choose to use Google Sign-In and cloud backup, your backup file is stored in your own Google Drive, under your control — not on servers we operate.

• If you use the AI-powered item import feature, the image or PDF you select is sent to Google's Gemini API to extract item details — this only happens when you explicitly use that feature.

• You can delete your data at any time by clearing app data or uninstalling the App.

2. Information We Collect

2.1 Information you enter directly

The App is a billing and inventory tool, so it stores what you enter to help run your business — this may include:

• Business profile details (name, address, phone, GST number, bank/UPI details, logo)

• Party (customer/supplier) names, phone numbers, and addresses

• Bills, invoices, transactions, payments, expenses, and item/inventory records

This information is stored in a local database on your device using SQLite. We do not have access to it, and it is not transmitted to us.

2.2 Contacts (optional, only if you use "Import from Contacts")

If you choose to import a party from your phone's contact list, the App reads the name and phone number of the specific contact(s) you select, and saves that information into the App's local database as a new party record. The App does not access your contacts unless you explicitly use this feature, and it does not read your full contact list in the background.

2.3 Photos and files (optional, only if you use specific features)

Feature

What happens

Business logo upload

An image you pick is saved locally on your device and used on your printed invoices.

AI-powered item import

An image or PDF you select is sent to Google's Gemini API to extract item details (names, prices, quantities), which are then saved to your local database.

Attachments on transactions

Files you attach (like a receipt photo) are stored locally on your device.

The App uses Android's built-in Photo Picker for these features, which does not require broad photo-library permissions — you select exactly which image or file to share with the App.

2.4 Google Account information (optional, only if you sign in)

If you choose to sign in with Google to enable cloud backup, we use Google Sign-In to authenticate you and Google Drive's API to store an encrypted backup of your local database in a private folder within your own Google Drive account. We do not have access to this backup file — it is stored under your Google account, governed by your own Google storage and permissions.

2.5 Biometric data

If you enable app-lock with fingerprint or face unlock, this is handled entirely by your device's operating system. The App never receives, stores, or transmits your biometric data — it only receives a yes/no confirmation that you were authenticated.

2.6 Information we do not collect

• We do not use advertising or analytics SDKs that track you across other apps or websites.

• We do not sell or rent your information to third parties.

• We do not have a server that stores your business, customer, or transaction data.

3. How We Use Information

Any information the App handles is used solely to provide the App's functionality to you:

• Generating invoices, bills, and reports

• Tracking payments, expenses, and inventory

• Sending you local notifications (e.g. low-stock or slow-moving item alerts) — generated and shown entirely on your device

• Backing up your data to your own Google Drive, if you enable this

• Extracting item details from a photo or document you choose to import via AI

4. Third-Party Services

The App uses the following third-party services, only for the specific purposes below:

Service

Purpose

Google Sign-In

Authenticating you if you choose to enable cloud backup

Google Drive API

Storing your backup file in your own Drive account

Google Gemini API

Extracting item details from a photo/PDF you choose to import

These services have their own privacy policies governing how they handle data sent to them, available at policies.google.com/privacy.

5. Data Storage and Security

• Your business data is stored locally in a SQLite database on your device.

• Backups, if enabled, are stored in your own Google Drive account.

• We recommend using your device's own screen lock and the App's optional biometric app-lock feature to protect your data if your device is shared or lost.

6. Your Rights and Choices

• Access & export: All your data is visible within the App itself, and can be exported as PDF reports or backups at any time.

• Deletion: You can delete individual records within the App, clear the App's data via Android Settings, or uninstall the App to remove all locally stored data.

• Backup deletion: If you've used Google Drive backup, you can delete the backup file directly from your Google Drive.

• Permissions: You can review and revoke any permission (Camera, Contacts, etc.) at any time via Android Settings → Apps → NKA BillBook → Permissions.

7. Children's Privacy

NKA BillBook is a business tool intended for use by business owners and staff. It is not directed at children, and we do not knowingly collect information from children under 13.

8. Changes to This Policy

We may update this Privacy Policy from time to time, for example as we add new features. We will update the "Effective date" above when changes are made. Continued use of the App after a change constitutes acceptance of the updated policy.

This policy is provided to give you a clear, accurate description of NKA BillBook's actual data practices. If any part of it is unclear, please reach out using the contact details below.

Contact Us

If you have questions about this Privacy Policy or how NKA BillBook handles your information, please contact:

Developer: Naveen
App: NKA BillBook (com.naveen.billbook)
Location: Jaipur, Rajasthan, India