In accordance with Google Play policy, our Data Safety section in the Play Store accurately reflects the practices described in this policy: no data collected, no data shared, no data transmitted externally. The App does not collect any user data as defined by Google Play's Data Safety requirements. You can verify this in the app's Play Store listing under "Data safety".
📋 Table of Contents
01Information We Access
Calc Pro accesses only the following minimal, on-device data required to operate the App's core features. None of this data is ever transmitted externally or stored outside your device.
| Data Type | Purpose | API Used | Sent Externally? |
|---|---|---|---|
| Calculation inputs & results | Perform and display arithmetic, unit conversions, and finance calculations | In-memory only | Never |
| Calculation history | Allow you to review, copy, or re-use past calculations within the App | Local SQLite DB | Never — local only |
| User preferences | Remember your chosen settings (theme, vibration, history display) | SharedPreferences | Never — local only |
android.permission.INTERNET in its AndroidManifest. Under Android's permission model, this makes it technically impossible for the App to open any network socket, make any HTTP/HTTPS request, or transmit any data to any external server — regardless of any code logic. This is verifiable by inspecting the APK manifest.
02Information We Do NOT Collect
In accordance with Google Play's data transparency requirements, we explicitly confirm that Calc Pro does not access, collect, process, or transmit any of the following categories of personal or sensitive user data:
- Personal identifiers — name, email address, phone number, user IDs, or any account information
- Precise or approximate location — GPS coordinates, IP-derived location, or network-based location
- Photos, videos, or media files — no access to device storage or media library
- Contacts or call logs — no access to your address book or call history
- SMS, MMS, or messaging content — no access to any messages
- Browsing history or app activity — no tracking of how you use other apps or websites
- Financial or payment information — no credit card numbers, bank data, or transaction history (numbers typed into the calculator are not financial data in this sense)
- Health or biometric data — no fitness, medical, or sensor data
- Audio or camera data — no microphone access, no camera access
- Unique device identifiers — no IMEI, Android ID, Advertising ID, or similar
- Crash or diagnostic data — no crash logs are sent to any remote server
03How We Use Information
Google Play policy requires us to disclose the specific purpose for every data type accessed. The following is a complete and accurate list of how data is used — all processing is local and on-device only:
3.1 Calculation Processing
Numbers and mathematical expressions you enter are processed in-memory in real time to produce results. This data exists only in RAM during your active session. Nothing is logged, persisted beyond the session, or sent anywhere.
3.2 Calculation History
With your implicit use of the history feature, previous calculations are stored in the App's private local SQLite database. This allows you to scroll back through past results, copy an old result, or re-use a formula. This database is stored in the App's private sandboxed storage — inaccessible to other apps — and can be fully cleared by you at any time from within the App or via Android system settings.
3.3 User Preferences
Settings you configure (such as Dark Mode, Shake to Clear, vibration feedback, and history visibility) are stored in Android's SharedPreferences within the App's private sandbox, so the App remembers your setup between sessions.
3.4 Vibration Feedback
If enabled, the App triggers your device's vibration motor via the VIBRATE system permission when a button is pressed. This is a hardware output action only — no data is read, recorded, or associated with this interaction.
04Data Storage & Security
4.1 Where Data Is Stored
| Data | Storage Location | Accessible by Other Apps? | Cleared When? |
|---|---|---|---|
| Active calculation | Device RAM (volatile memory) | No — sandbox isolated | When App is closed |
| Calculation history | Private SQLite database on-device | No — private app storage | When you clear history or uninstall |
| User preferences | Android SharedPreferences (private) | No — private app storage | When you clear app data or uninstall |
4.2 Security Measures
- Android Application Sandbox: The App runs within Android's sandboxed execution environment, which isolates its data from all other apps and system components.
- No network transmission: The physical absence of the INTERNET permission in the manifest prevents any data from leaving the device at the OS level.
- No third-party SDKs: The App includes no external libraries that could independently initiate data collection or transmission.
- Secure system APIs only: All data interactions use official Android APIs with built-in access control.
05Permissions Explained
Google Play policy requires all apps to provide a clear, honest disclosure of every permission requested and its purpose. Below is the complete and accurate list for Calc Pro:
| Permission | Status | Exact Purpose | If Denied |
|---|---|---|---|
VIBRATE |
Optional | Activates the device vibration motor for a brief tactile pulse when you press a calculator button. This is a hardware output only — no data is read or recorded from this permission. | App works fully. Button-press vibration will not occur. |
Google Play policy requires developers to justify sensitive permission usage. The following permissions are intentionally absent from Calc Pro's AndroidManifest:
- INTERNET — Cannot send any data to external servers. Absent by design.
- ACCESS_NETWORK_STATE / ACCESS_WIFI_STATE — Cannot check network status.
- READ / WRITE_EXTERNAL_STORAGE — Cannot access photos, files, or documents.
- CAMERA / RECORD_AUDIO — Cannot capture images or audio.
- ACCESS_FINE_LOCATION / ACCESS_COARSE_LOCATION — Cannot track location.
- READ_CONTACTS / READ_CALL_LOG / READ_SMS — Cannot access personal communications.
- READ_PHONE_STATE — Cannot read device identifiers such as IMEI.
06Third-Party Services
Google Play policy requires disclosure of all third-party SDKs and their data practices. Calc Pro includes no third-party analytics, advertising, or crash-reporting SDKs. The following system-level Google services may be present to support standard Play Store functionality:
6.1 Google Play Core Library
The App may integrate Google Play's core library for the following standard functions only:
- In-App Updates: Allows the App to check for and prompt installation of a newer version from the Play Store. This interaction is handled entirely by the Play Store app — no user data from Calc Pro is transmitted. This feature only activates when explicitly triggered.
- In-App Review: Allows you to submit a star rating or review for the App from within the UI, via the standard Play Store review dialog. No review content or personal data is processed by Calc Pro itself.
6.2 SDKs We Do NOT Include
- No analytics SDKs — No Google Analytics, Firebase Analytics, Mixpanel, or any equivalent
- No advertising SDKs — No AdMob, Meta Audience Network, AppLovin, or any ad network
- No crash reporting SDKs — No Crashlytics, Sentry, Bugsnag, or remote crash tools
- No social SDKs — No Facebook, Twitter, or social login libraries
- No cloud storage SDKs — No Firebase Firestore, Realtime Database, or cloud sync
07Data Sharing & Disclosure
7.1 Zero Data Sharing Policy
Calc Pro does not share, sell, rent, trade, license, or otherwise disclose any user data to any third party under any circumstances. This is both a legal commitment and a technical reality. Because we do not collect or possess any user data, there is nothing to share.
7.2 Legal Requests from Authorities
We cannot comply with data requests from law enforcement agencies, government bodies, courts, or any other authority — because BytXen does not hold, possess, or have access to any Calc Pro user data. All data created by use of the App resides exclusively on the user's device.
7.3 Business Transfers
In the event of a merger, acquisition, bankruptcy, or transfer of assets, no user data would be transferred as part of that transaction, because no user data is held by BytXen.
08Your Rights & Data Deletion
Google Play policy (effective December 7, 2023 and ongoing) requires apps to provide users with clear data deletion options. Although Calc Pro holds no data on our servers, we provide full on-device deletion controls:
8.1 Delete Your Calculation History
- From within the App: Tap the history icon → tap "Clear All" to permanently delete all saved calculations instantly.
- Via Android Settings: Go to Settings → Apps → Calc Pro → Storage → Clear Data — this resets the App completely, removing all history and preferences.
8.2 Delete All App Data
- Clear App Data: Settings → Apps → Calc Pro → Storage → Clear Data — deletes all history, preferences, and cached data permanently.
- Uninstall the App: Uninstalling Calc Pro permanently removes all associated local data from your device. No residual data exists on any server.
8.3 Your Rights Under Privacy Law
Depending on your jurisdiction, you may have the following rights regarding personal data. Since BytXen holds no personal data about you, these rights are satisfied by the on-device controls above:
Request what data is held about you. We hold none — your data is only on your device under your control.
Request erasure of your data. Use "Clear History" or "Clear Data" in Android settings at any time.
Correct inaccurate data. Your history is editable directly within the App.
Export your data. You can manually copy calculations from the history view.
Object to processing. You can clear all history and disable history saving in App settings.
Revoke the VIBRATE permission at any time via Android Settings → Apps → Calc Pro → Permissions.
To exercise any of these rights or if you have questions, contact us at the address in Section 12. We will respond within 30 days as required by GDPR and applicable law.
09Children's Privacy
Calc Pro is appropriate for all ages and is suitable for use by children. The App does not knowingly collect personal information from anyone, including children under the age of 13 (or the applicable age of digital consent in your jurisdiction).
The App's offline, zero-collection design fully satisfies the requirements of:
- COPPA — Children's Online Privacy Protection Act (USA, age 13)
- GDPR-K — GDPR provisions for children (EU, age 16 or member state minimum)
- Age-Appropriate Design Code — Children's Code (UK, age 18)
- Google Play Families Policy — We do not collect personal data, show ads, or include in-app purchases
Parents and guardians can safely allow children to use Calc Pro. The App does not require account creation, contain advertisements, include in-app purchases, access the internet, or communicate with any external service.
10Changes to This Policy
10.1 When We Update This Policy
We may update this Privacy Policy to reflect changes in Android OS requirements, new App features, legal or regulatory obligations, or evolving best practices. The "Last Updated" date at the top of this document will always reflect the most recent revision.
10.2 How You Will Be Notified
- This page: The updated policy will be posted at this URL immediately upon taking effect.
- Google Play Store listing: The privacy policy link in the Play Store will always point to the current version.
- In-app notification: For any material change that affects data collection or user rights, an in-app notice will be displayed on next launch, before the change takes effect.
- Version history: We maintain a revision date at the top of this document so you can track when changes were made.
10.3 Continued Use
Your continued use of Calc Pro after a policy update constitutes acceptance of the revised policy. If you do not agree with an update, you may delete the App at any time. For material changes involving data collection, we will obtain your explicit consent before those changes apply to you.
11Legal Compliance & Jurisdiction
11.1 Google Play Policy Compliance
- Google Play Developer Program Policies (Jan 28, 2026): This policy comprehensively discloses all data access, collection, use, and sharing in compliance with the User Data policy section.
- Data Safety Form: Our Data Safety declaration in Play Console accurately reflects this policy. Declared values: no data collected, no data shared.
- Sensitive Permissions: All permissions are fully disclosed with justification. No sensitive permissions beyond
VIBRATEare used. - SDK Compliance: We are responsible for ensuring all code in the App — including any third-party code — complies with Google Play policies, as required by Google.
- Data Deletion: Data deletion options are provided as required by Google Play policy (in-app clear history, Android system clear data, and uninstall).
11.2 International Privacy Regulations
| Regulation | Jurisdiction | Compliance Status |
|---|---|---|
| GDPR — General Data Protection Regulation | European Union | Compliant |
| CCPA — California Consumer Privacy Act | California, USA | Compliant |
| COPPA — Children's Online Privacy Protection Act | USA | Compliant |
| LGPD — Lei Geral de Proteção de Dados | Brazil | Compliant |
| PIPEDA — Personal Information Protection Act | Canada | Compliant |
| Privacy Act 1988 | Australia | Compliant |
11.3 Privacy Principles
- Privacy by Design: Privacy is a core architectural principle embedded from the start of development, not an afterthought.
- Data Minimization: Only the absolute minimum data necessary for core functionality is accessed — and none of it leaves the device.
- Purpose Limitation: Each data access is tied to a single, clearly stated, user-expected purpose. No secondary use of data occurs.
- Transparency: This policy is publicly accessible, written in plain language, and kept up to date with actual App behavior.
12Contact Information
If you have any questions, concerns, requests, or feedback regarding this Privacy Policy or the App's data practices, please contact us. We are committed to responding to all privacy-related inquiries.
Developer / Studio: BytXen
Email: tech.bytxen01@gmail.com
App Name: Calc Pro
Response Time: We aim to respond to all inquiries within 48–72 hours, and within 30 days for formal data rights requests under GDPR/CCPA.
What to Include in Your Message
To help us respond efficiently, please include your device model and Android version, the Calc Pro version number (visible in Play Store or App info), and a clear description of your question or concern.