Privacy Policy
Last updated: September 2026
Protecting your private information is our priority. This Privacy Policy applies to the PureSubject mobile application (hereinafter referred to as "the App") and governs data collection and usage.
1. Image Data Processing
On-Device Processing: All images selected or edited within the App are processed exclusively on your local device.
No Cloud Upload: The App does not upload your photos to any external servers. The subject segmentation (background removal) is performed locally using on-device machine learning technology.
Storage: Edited images are only saved to your device's gallery (specifically in the DCIM/PureSubject folder) when you explicitly click the "Save PNG" button.
2. Permissions
To function correctly, the App requires the following permissions:
Storage/Media Access: This is required to load images from your gallery for editing and to save the processed results back to your device.
3. Google ML Kit (AI Segmentation)
The App uses Google’s ML Kit (Subject Segmentation API) to identify and separate subjects from the background.
Image feature processing happens in real-time on your smartphone.
According to Google, this API does not send your image data to Google servers for subject segmentation purposes.
Technical diagnostic data may be transmitted to Google to improve the stability and performance of the API.
4. Third-Party Services & Advertising
To keep our App free of charge, we use third-party advertising services provided by Google.
Google AdMob Our App integrates Google AdMob to display banner ads and rewarded video advertisements. AdMob may collect and use pseudonymous data (such as your device's Advertising ID, IP address, coarse/approximate location data, device information, and ad interaction data) to serve personalized or non-personalized advertisements, ensure fraud detection, and measure ad performance.
Google's use of information collected through AdMob is governed by Google’s Privacy Policy:
Google Privacy & Terms
How Google uses information from sites or apps that use our services
You can opt out of personalized advertising in your Android device settings under "Google" > "Ads".
5. Local Data (SharedPreferences)
The App stores small data fragments (SharedPreferences) locally on your device. These are used for technical purposes only, such as:
Managing the 24-hour limit for saving images.
Recording timestamps of the last rewarded ad viewed to grant "premium" save access. This data remains on your device and is not shared with us or any third parties.
6. Data Security
We do not use any analytics tools to track your behavior. Since no image data or personal profiles are stored on our servers, there is no risk of a data breach originating from our infrastructure.
7. Children's Privacy
The App does not knowingly collect personally identifiable information from children under the age of thirteen.
8. Changes to this Privacy Policy
We may update our Privacy Policy from time to time. You are advised to review this page periodically for any changes. Changes are effective immediately after they are posted on this page.
9. Contact Information
If you have any questions or suggestions about this Privacy Policy, do not hesitate to contact us at:
WR Tools Email: dev.wr-tools@outlook.com