Privacy Policy

PDF Sigma ("App," "we," "us," or "our") is a mobile application developed by Capricorn Labs and published on Google Play. This Privacy Policy explains what information we collect, how we use it, and the choices you have regarding your personal data.

By downloading or using PDF Sigma, you agree to the practices described in this policy. If you do not agree, please discontinue use of the App.

This policy is intended to comply with applicable data protection regulations including GDPR, CCPA, and Google Play's User Data policy.

We distinguish between data processed locally on your device and data transmitted externally. The table below summarizes what is currently collected:

Data Type	Collected?	Where Processed
Your PDF files & their contents	On-device only	Never leaves your phone
Crash & error logs	Collected	Firebase Crashlytics
Anonymous usage events	Collected	Firebase Analytics
Advertising identifiers	Collected	Google AdMob
Name, email, or personal identity	Not collected	-
Location data	Not collected	-
Contacts, camera, microphone	Not collected	-

PDF Sigma is a fully offline PDF utility. All PDF processing - including merging, splitting, compressing, converting, and annotating - occurs on your device. Your document contents are never uploaded to our servers or any third-party server as part of the app's core functionality.

Any data we collect is used solely for the following legitimate purposes:

• Maintaining and improving the stability of the App
• Understanding which features are most used so we can prioritize improvements
• Detecting and resolving technical errors and crashes
• Delivering non-personalized or personalized advertisements, where applicable
• Complying with legal obligations

We do not sell, rent, or trade your personal data to any third party for their own marketing purposes.

Current status: PDF Sigma currently uses Google Firebase Analytics to collect anonymous, aggregated usage data.

Firebase Analytics

Firebase Analytics may collect:

• App open / session duration events
• Feature interaction events (e.g., "PDF merged," "File compressed")
• Device model, OS version, and app version
• General geographic region (country level only)

This data does not include the names, content, or metadata of your PDF files. Firebase Analytics is operated by Google LLC.

Google Privacy Policy ↗

Current status: PDF Sigma currently uses Firebase Crashlytics for crash reporting.

Firebase Crashlytics

Crash reports may include:

• Stack traces and error messages at the time of the crash
• Device model, OS version, and App version
• Timestamp of the crash
• A randomly assigned installation identifier

Crash reports do not contain the contents of your PDF files or intentionally collected personally identifiable information. Crash data is used to identify and fix bugs.

Firebase Crashlytics is operated by Google LLC.

Current status: PDF Sigma currently uses Google AdMob to display advertisements within the App.

Google AdMob

AdMob may collect and use:

• Advertising identifiers (Google Advertising ID / GAID)
• Device information (model, OS version, language, time zone)
• IP address for general location inference
• Interaction with displayed ads

Advertising may be personalized or non-personalized. AdMob is operated by Google LLC.

AdMob privacy practices ↗

PDF Sigma may request Android permissions for the following purposes:

Permission	Purpose	Uploaded to Server?
READ_EXTERNAL_STORAGE / READ_MEDIA_*	Read PDF files you select	No
WRITE_EXTERNAL_STORAGE	Save processed PDF files to your device	No
INTERNET	Firebase Analytics, Crashlytics and Google AdMob	Service data only

No other permissions are requested. The App does not access your camera, microphone, contacts, location, or other sensitive system resources.

The App currently uses the following third-party services. Each provider has its own privacy policy governing data they independently collect:

Service	Provider	Status	Privacy Policy
Firebase Analytics	Google LLC	Active	View ↗
Firebase Crashlytics	Google LLC	Active	View ↗
Google AdMob	Google LLC	Active	View ↗

We are not responsible for the privacy practices of third-party services. We encourage you to review their respective policies.

Your PDF files are stored entirely on your device and are never retained by us. You control your files at all times through your device's file system.

Anonymous analytics and crash data are retained according to the applicable third-party providers' data retention policies.

Uninstalling the App removes locally stored App data. Data already transmitted to third-party services is governed by their respective retention schedules.

PDF Sigma is not directed at children under the age of 13, and we do not knowingly collect personal information from children under 13. If we become aware that we have inadvertently received personal information from a child under 13, we will delete that information as required.

If you are a parent or guardian and believe your child has provided us with personal data, please contact us using the information in Section 13.

Depending on your jurisdiction, you may have rights regarding your personal data, including:

• Access: Request a copy of personal data we hold about you.
• Deletion: Request deletion of your personal data.
• Correction: Request correction of inaccurate personal data.
• Portability: Request a machine-readable copy of your data where applicable.
• Opt-out: Manage analytics or advertising choices where applicable.

Because PDF files are processed locally and we do not maintain user accounts, most rights relating to locally stored files can be exercised directly through your device. For data processed by third parties, please refer to the respective provider's privacy controls.

To exercise any applicable right, contact us at the address in Section 13.

We may update this Privacy Policy from time to time. When we do, we will update the "Last updated" date at the top of this page and, where required by applicable law, notify you through appropriate means.

Continued use of the App after any changes constitutes acceptance of the revised Privacy Policy where legally permitted.

Material changes, such as the introduction of new data collection practices, will be communicated with reasonable notice where possible.

If you have any questions, concerns, or requests regarding this Privacy Policy or your personal data, please reach out:

We aim to respond to privacy-related inquiries within 30 business days.