Privacy Policy
Last Updated: May 11, 2026
Smart Calculator & Convert ("the App") is a simple calculator and unit converter app developed by Siversky Donets. This Privacy Policy explains how we handle any information related to your use of the App.
We design the App to respect your privacy. You do not need to create an account or provide any personal information to use it. Most features work completely offline, and any data you create (such as calculations or templates) stays on your device.
This Privacy Policy applies to the Android app Smart Calculator & Convert, which offers tools for basic calculations, unit conversions, GST, EMI, BMI, SIP, and currency calculations. It describes the types of information we may collect, how we use it, and your rights.
We comply with applicable laws including GDPR (for EU users), CCPA/CPRA (for California residents), and CalOPPA.
We do not collect any personally identifiable information such as your name, email address, phone number, or location.
The App processes and stores your calculations, preferences, and custom data locally on your device. Any data recovery operations happen locally.
We may receive anonymized, aggregated usage data and crash reports through Firebase. This data does not identify you personally and helps us improve app stability and features.
Where GDPR applies, our processing relies on:
Legitimate interests — to improve the App, provide functionality, show relevant ads, and ensure security.
Consent — for non-essential cookies/tracking (where required) and push notifications. You can withdraw consent anytime via device settings.
Contractual necessity — to deliver the services you request, including in-app purchases.
The App requests only the permissions listed below. You can manage or revoke them through your device settings at any time.
INTERNET — Required to fetch live currency exchange rates and to display advertisements.
ACCESS_NETWORK_STATE — Allows the App to check network availability before making internet requests, improving user experience and saving battery.
POST_NOTIFICATIONS — Used to send important push notifications such as app updates, calculation reminders, or premium feature alerts (only if you enable notifications).
VIBRATE — Provides haptic feedback when you press calculator keys or receive notifications, enhancing the user interface.
No other permissions are requested. The App does not access your contacts, photos, microphone, camera, or location.
All user-generated data (calculations, history, templates) is stored locally on your device using secure local storage solutions such as Android Room database. This data never leaves your device through our App unless you explicitly use a feature that requires internet (e.g., currency rates).
We implement industry-standard technical and organizational measures to protect any anonymized data we receive. However, no system is completely risk-free. We do not make absolute guarantees of security.
We use the following libraries and services. Each has its own privacy practices:
Firebase (Analytics, Crashlytics, Firestore, Messaging, Performance) — Provides anonymized usage statistics, crash reporting, and performance monitoring. Firebase Privacy Policy
Google AdMob / AdX — Displays advertisements. Ad networks may collect device identifiers and usage data for personalized ads. See Google Privacy Policy
Meta Audience Network (Facebook) — Used for advertising. Meta Privacy Policy
Retrofit + Gson — Makes secure API calls to fetch currency exchange rates.
Glide — Loads and caches images efficiently.
Lottie — Renders smooth animations.
exp4j — Evaluates mathematical expressions.
Room — Local database for storing your data offline.
Google Play App Update — Checks for and installs updates seamlessly.
Other libraries (AndroidX components, SDP/SSP for responsive design) are part of the Android framework and do not collect personal data.
The App displays third-party advertisements through AdMob, AdX, and Meta Audience Network. These services may use device identifiers, IP addresses, and interaction data to show relevant ads.
You can limit personalized advertising through your device settings (Google Ads settings or device-level ad personalization controls).
Firebase provides anonymized analytics to help us understand which features are most used.
The App does not use traditional browser cookies. Third-party advertising and analytics services may use device identifiers, advertising IDs, or similar technologies. You can reset your advertising ID in device settings.
Since we do not collect personal data directly, this section primarily covers anonymized data processed by third parties (Firebase and ad networks). This may include:
Device information (model, OS version)
App usage events (features used, session duration)
Crash logs (to fix bugs)
Advertising interaction data
This data helps improve the App and deliver relevant ads.
Local data on your device remains until you delete it or uninstall the App.
Anonymized analytics data is retained by third parties according to their policies (see links above). Uninstalling the App removes all local data associated with it.
The App offers in-app purchases and subscriptions. All payments are handled securely by Google Play Billing. We do not collect, store, or see your payment details (such as credit card numbers or passwords).
Subscriptions renew automatically unless canceled before the next billing date. Manage or cancel anytime in your Google Play account settings. You keep premium access until the end of the current period if you cancel.
Google may share limited, non-personal information with us (such as subscription status) so we can enable premium features.
Refunds and Cancellations must be requested through Google Play.
We do not share your purchase information with any other third parties except as required for payment processing. All transactions follow Google Play Terms of Service and Google Privacy Policy.
You have the right to:
Access, correct, or delete your data (primarily by managing local data or uninstalling).
Object to or restrict processing.
Withdraw consent.
Data portability (where applicable).
Contact us at the email below to exercise these rights. We will respond promptly.
California residents may:
Know what personal information is collected.
Request deletion.
Opt out of the sale of personal information (we do not sell personal data).
Non-discrimination for exercising rights.
Our App does not respond to Do Not Track signals because we do not track users across other websites or apps in a way that requires it. You can still control advertising preferences through device settings.
Anonymized data processed by Firebase and advertising partners may be transferred to and stored in the United States or other countries. These transfers follow standard contractual clauses or equivalent safeguards where required.
We do not engage in or support malware distribution. The App only makes necessary network requests for currency rates and ads. We encourage users to download from Google Play only.
The App may contain links to external sites. We are not responsible for their privacy practices. Please read their policies.
The App is not targeted at or intended for children under 13. We do not knowingly collect data from children.
We may disclose anonymized or limited data if required by law, court order, or government request.
We may update this Privacy Policy occasionally. The “Last Updated” date at the top shows the latest version. Continued use of the App after changes means you accept the updated policy.
If you have any questions about this Privacy Policy, please contact us:
Siversky Donets
Gujarat, India
Email: siverskydonetss@gmail.com
Thank you for using Smart Calculator & Convert. We value your trust and privacy.