1. Introduction This privacy policy applies to the Offline OCR app (io.github.lingyunzheng.ocr). We respect your privacy and are deeply committed to protecting it. To provide you with both maximum privacy and advanced recognition capabilities, our application operates using a dual-engine architecture featuring a secure local offline mode and an advanced, opt-in cloud mode.
2. Permissions We Request
Camera (android.permission.CAMERA):
Purpose: Used solely to capture images of documents or math formulas for recognition and extraction.
Data Handling:
On-Device AI Mode (Default): When using our local AI models, all Optical Character Recognition (OCR) processing—including complex math formula parsing—is performed strictly and entirely on your device's hardware. Your images, documents, and recognized text never leave your phone. We do not upload any data to any server, guaranteeing 100% privacy.
Cloud Assist Mode (Optional): To ensure users with standard-performance devices can still achieve the highest level of recognition accuracy without taxing their device's hardware, we offer an optional Cloud AI service. If you explicitly select this mode for enhanced results, the selected image is temporarily transmitted via a secure, encrypted connection to our AI processing servers. We do not store, sell, or use your images or text to train any models. All data is permanently and immediately deleted from the server once the recognition result is returned.
Internet (android.permission.INTERNET):
Purpose: 1. To securely communicate with our Cloud AI servers ONLY when you actively choose to use the advanced Cloud recognition mode. 2. To display advertisements provided by Google AdMob to support the ongoing development of this free app.
3. Third-Party Services & Data Collection We use trusted third-party services to enhance app functionality and support development:
Secure Cloud Processing Engine: When you actively choose to use the "Cloud Mode" for complex formula recognition, your selected image is transmitted via enterprise-grade, encrypted HTTPS connections. This process is routed through global edge networks (such as Cloudflare) to ensure maximum speed and security. The image data is processed strictly in real-time by industry-leading AI models. We explicitly guarantee that your images are NEVER stored on our servers, NEVER sold, and NEVER used to train any machine learning models. All data is permanently and immediately destroyed once the recognition result is returned to your device.
Google AdMob: This service may collect and use data such as your Device ID, Advertising ID, and IP address to provide personalized or non-personalized advertising, analytics, and fraud prevention. For more information on how Google manages data, please visit: Google Privacy & Terms.
4. Contact Us If you have any questions, concerns, or requests regarding this privacy policy or your data, please contact us directly at: zhenglingyun829@gmail.com