Introduction
This Privacy Policy applies to all calculator applications ("Calculator Apps") published by Stark Enterprises on the Google Play Store. This includes, but is not limited to, EMI Calculator, SIP Calculator, GST Calculator, BMI Calculator, Loan EMI Calculator, Compound Interest Calculator, Calorie Calculator, GPA Calculator, Fuel Cost Calculator, and all other calculator apps under the com.calculator.* package namespace.
By downloading, installing, or using any of our Calculator Apps, you agree to the terms of this Privacy Policy.
Apps Covered
This single privacy policy covers all calculator apps published by Stark Enterprises, spanning the following categories:
- Finance Calculators - EMI, SIP, GST, FD, RD, Compound Interest, Simple Interest, Tax, Discount, Profit Margin, Investment Return, Salary Hike, Inflation, Brokerage
- Construction Calculators - Brick, Concrete, Cement, Sand, Tile, Plaster, Paint, Steel Weight, Floor Area, Staircase, Roofing, Block, Construction Material
- Agriculture Calculators - Fertilizer, Seed Rate, Irrigation, Crop Yield, Pesticide Mix, Livestock Feed, Crop Profit, Greenhouse, Tractor Fuel, Soil Nutrient, Farming Cost
- Health Calculators - BMI, Calorie, Body Fat, Water Intake, Pregnancy Due Date, Ovulation, BMR, Ideal Weight, Heart Rate, Sleep Cycle, Weight Loss, Macro, TDEE
- Student Calculators - Percentage, GPA, CGPA, Age, Exam Score, Grade, Study Timer, Attendance, Marks Percentage, Semester Grade
- Vehicle Calculators - Fuel Cost, Mileage, Trip Cost, Car Loan, EV Charging, Petrol Cost, Diesel Mileage, Road Trip, Vehicle Expense
- Daily Utility Calculators - Age Difference, Date Duration, Time, Work Hours, Salary, Tip, Unit Price, Savings, Budget, Break Even, Daily Expense, Overtime, Rent Affordability, Loan Affordability
Information We Collect
Our Calculator Apps are designed with your privacy in mind. Here is what you should know:
Information We Do NOT Collect
- We do not collect, store, or transmit any personal information
- We do not require registration, login, or account creation
- We do not collect names, email addresses, phone numbers, or location data
- We do not store your calculator inputs or results on any server
- All calculations are performed locally on your device
- The apps work completely offline (except for ads)
Information Collected by Third-Party Services
Our apps use the following third-party services that may collect certain data:
1. Google AdMob (Advertising)
Our free apps display advertisements through Google AdMob. AdMob may collect:
- Device identifiers (Advertising ID)
- IP address
- Device information (model, OS version, screen size)
- Approximate location (based on IP address)
- Ad interaction data (impressions, clicks)
Google AdMob's data collection is governed by Google's Privacy Policy: https://policies.google.com/privacy
You can opt out of personalized advertising by visiting: Google Ads Settings
2. Google Play Billing (In-App Purchase)
Our apps offer a one-time "Remove Ads" in-app purchase through Google Play Billing. Payment processing is handled entirely by Google Play. We do not collect, store, or have access to your payment information (credit card, debit card, UPI, etc.).
Google Play's privacy policy applies: https://policies.google.com/privacy
3. Google Play In-App Review
Our apps may prompt you to rate the app using Google's In-App Review API. This is handled entirely by Google Play and we do not collect any data from this interaction.
Data Storage
The only data stored locally on your device is:
- App open count - Used to trigger a review prompt after a certain number of uses
- Ad-free purchase status - To remember if you purchased the "Remove Ads" option
- Review shown flag - To avoid showing the review prompt repeatedly
This data is stored using Android SharedPreferences on your device only. It is never transmitted to our servers or any third party. Uninstalling the app removes all locally stored data.
Permissions
Our Calculator Apps request minimal permissions:
- INTERNET - Required to display advertisements and process in-app purchases
- ACCESS_NETWORK_STATE - To check network connectivity before loading ads
We do not request access to your contacts, camera, microphone, storage, location, or any other sensitive permissions.
Children's Privacy
Our Calculator Apps are rated "Everyone" on Google Play Store and are safe for all ages. We do not knowingly collect personal information from children under 13. Since our apps do not collect any personal data, they are compliant with the Children's Online Privacy Protection Act (COPPA).
Ad-Free Option
Each of our Calculator Apps offers a one-time in-app purchase to remove all advertisements. Once purchased, no ads will be displayed, and AdMob will no longer collect any data through our app.
Data Security
Since our apps do not collect or transmit personal data, the risk of data breach is minimal. All calculations happen locally on your device. We take reasonable measures to ensure our apps are secure and free from malware.
Changes to This Privacy Policy
We may update this Privacy Policy from time to time. Any changes will be reflected on this page with an updated "Last updated" date. We encourage you to review this page periodically. Your continued use of our apps after changes are posted constitutes acceptance of the updated policy.
Your Rights
Since we do not collect personal data, there is no personal data to access, modify, or delete. If you wish to stop any third-party data collection (Google AdMob), you can:
- Purchase the "Remove Ads" in-app option
- Opt out of personalized ads via Google Settings on your device
- Uninstall the app
Contact Us
If you have any questions or concerns about this Privacy Policy or our Calculator Apps, please contact us:
- Developer: Stark Enterprises
- Email: srm1111989@gmail.com