Privacy Policy

Effective date: May 23, 2026 · Last updated: May 23, 2026

This Privacy Policy applies to all apps published by Calimax Institute under the Calimax Group on Google Play Store and the Calimax App Store. We build apps that respect your privacy and keep your data under your control.

1. Our Privacy Commitment

All Calimax apps are designed as offline-first applications. Your data stays on your device by default. We do not run servers that collect your business data, personal logs, invoices, or app content. Data leaves your device only when you explicitly choose to export, share, back up, or print it.

🛡 Core Principle: Your app data is stored locally on your device. No Calimax server collects or stores your invoices, client lists, billing records, reminders, documents, scans, hydration logs, or study data.

2. App-by-App Data Summary

Below is exactly what data each app stores (all on-device unless you export/share):

🧾 Calimax GST Billing
Smart GST invoicing, inventory, OCR & POS for Indian businesses
  • Business profile (name, address, GSTIN, contact)
  • Client/customer details (name, address, contact)
  • Invoice data (items, amounts, taxes, dates)
  • Inventory records (stock, products, categories)
  • Generated invoices & reports (PDFs stored locally)
  • App settings and local PIN (if configured)
💧 AquaBell Water Intake
AI-powered hydration tracker with achievements & analytics
  • Profile info (name, contact, age, height, weight, gender, activity level)
  • Hydration logs (amount, beverage type, timestamp)
  • Daily water intake goals & progress
  • Achievement progress & unlock status
  • Reminder preferences (intervals, weekdays, active hours)
  • AI voice settings (name, gender preference)
  • Backup files (JSON) and export files (CSV)
  • Locally generated device identifier
🏥 MediMax Billing
Medical billing & clinic inventory management
  • Clinic profile (name, address, registration details)
  • Patient records (name, contact, medical notes)
  • Billing records (consultation fees, procedure costs)
  • Medicine inventory (stock, expiry, reorder levels)
  • Generated bills & reports
📄 Calimax Invoice Maker
Global invoicing for USA, UK & worldwide users
  • Business/seller profile (name, address, logo, contact)
  • Client details (name, address, email)
  • Invoice records (items, currency, amounts, dates)
  • Generated invoice PDFs
  • App preferences (currency, templates, tax rates)
📦 Calimax Inventory Pro
Multi-location warehouse & stock management
  • Warehouse/location profiles
  • Product catalog (SKU, name, category, cost, price)
  • Stock levels & movement history
  • Purchase orders & supplier info
  • Low stock alerts & reports
🎓 Student App
Study companion with attendance & grade tracking
  • Student profile (name, school/college, course)
  • Attendance records & schedule
  • Grade/result records
  • Study notes, task lists & reminders
  • Timetable & exam schedule
📑 PDF Tools
Merge, split, compress & secure PDFs
  • No personal data stored beyond the files you process
  • Source PDFs are read from your device storage
  • Output PDFs are saved to your device storage
  • Processing is done entirely on-device
🤖 Somanu
All-in-one personal & business assistant
  • Profile information & preferences
  • Task lists, notes, reminders
  • Contact & calendar data (if synced by user)
  • Search & interaction history within the app
💰 Calimax Expense Tracker
Daily expense & budget planner
  • Expense records (amount, category, date, notes)
  • Budget limits & targets
  • Income records
  • Category preferences & custom labels
📷 Calimax QR Scanner
Fast QR & barcode scanner
  • Scan history (stored locally & editable)
  • No camera data is stored permanently
  • QR/barcode content you choose to save
📄 Calimax Doc Scanner
Document scanner & OCR
  • Scanned document images (stored on your device)
  • OCR-extracted text (stored with documents)
  • No camera data stored beyond the final scan
📇 Calimax Business Cards
Digital business card maker
  • Your business card details (name, title, company, contact)
  • Card design preferences
  • Generated card images / vCards

3. How Data Is Used

All data stored by our apps is used solely to provide the app's functionality — creating invoices, logging hydration, tracking attendance, managing inventory, generating reports, scanning documents, and so on. We do not mine, sell, or analyze your app data for advertising or profiling.

4. Permissions We Request

Different apps request different permissions depending on their features. Common permissions include:

  • Notifications: For reminders (hydration, bills, tasks)
  • Camera: For document scanning, QR scanning, OCR
  • Storage: For saving invoices, PDFs, backups, exports
  • Microphone: For AI voice features (AquaBell)
  • Vibration: For reminder alerts
  • Wake Lock: For alarm & reminder playback
  • Boot Completed: To restore reminders after device restart
  • Schedule Exact Alarm: For timely reminders

No permission is used for data collection or tracking. Every permission serves a specific app feature visible to you.

5. Advertising (Google AdMob)

Some of our apps may display ads through Google AdMob. AdMob may collect device identifiers (Advertising ID), ad interaction data, and diagnostic logs according to Google's advertising policies. Users in applicable regions are shown consent dialogs. Apps that do not display ads (including AquaBell Water Intake) do not use AdMob.

AdMob's privacy practices are governed by Google's Privacy Policy.

6. Google Drive Backup

If you choose Drive Backup in apps that support it, the app uses Google Drive access only to create and restore backup files within the app's own Drive folder. The app does not request full Drive access or read other files on your Drive.

7. Sharing Your Data

Our apps share data only when you trigger the action — such as:

  • Sending an invoice via email, WhatsApp, or SMS
  • Opening a PDF in another app
  • Exporting a report or CSV file
  • Backing up to Google Drive
  • Printing a document

Once shared, the receiving app or service handles the data according to its own privacy policy.

8. Security

  • Cleartext traffic is disabled in all our apps
  • Data is stored locally on your device using Android Room database
  • Where applicable, local PIN protection is available
  • Backup files use standard JSON format readable only by the app
  • We use ProGuard code obfuscation in release builds

9. Third-Party Services

Our apps may interact with the following third-party services (all governed by their own policies):

  • Google Play Services (app distribution, updates)
  • Google AdMob (advertising in select apps)
  • Google Drive (optional backup in select apps)
  • Android System Components (notifications, alarms, TTS engine)
  • File Provider (sharing files to other apps)

10. Children's Privacy

Our apps are not directed to children under 13. We do not knowingly collect data from children. Student App is designed for general educational use by students of all ages but does not request age verification or collect sensitive child data.

11. Data Retention and Deletion

Your data remains on your device until you:

  • Delete individual records within the app
  • Clear the app's storage in Android Settings
  • Uninstall the app

Exported files, shared documents, and backups saved outside the app must be deleted separately by you.

12. Changes to This Policy

We may update this policy from time to time. Changes will be posted on this page and reflected in the effective date. Continued use of our apps after changes constitutes acceptance.

13. Contact Us

For privacy questions, data requests, or to report concerns:

Email: app@calimax.in

Website: https://app.calimax.in

Developer: Calimax Institute (Calimax Group)