This privacy policy explains how SmileAlarm ("the App") handles user information.
1. Basic Policy
The App does not collect personal information (name, email, phone number, location, contacts, etc.). Alarm settings are stored only on your device. Smile photos and smile logs are stored on your device and, if signed in to iCloud, automatically synced to your personal iCloud account. Anonymous usage data and crash logs are collected for quality improvement (see details below).
2. Camera and Face Data Usage
The App uses the device camera for smile detection to stop alarms. Smile detection is powered by Apple's TrueDepth camera and the ARKit framework.
- Data collected: The App reads facial expression values from ARKit's BlendShapes API in real-time (numerical values from 0.0 to 1.0 representing mouth corner movement and cheek raise). No 3D face model, depth map, or facial imagery is stored
- Purpose: The expression values are used solely to determine if the user is smiling and to calculate a smile score (0-100 points)
- Data retention: Face data is used only for real-time processing and is not stored on the device or externally. It is discarded immediately after processing
- External transmission: Camera footage and face data are never sent to any external server
- No advertising or marketing use: Face data is never used for advertising, marketing, or data mining purposes
- Camera permission: Camera access requires your explicit permission through the iOS permission dialog
3. Smile Photos and Smile Logs
When a smile is detected while stopping an alarm, a photo and score may be saved.
- Storage: Stored on your device. If signed in to iCloud, data is also synced to your personal iCloud account
- Privacy: iCloud data is accessible only by you. Neither other users nor the developer can access it
- External transmission: Data is never sent to any server other than Apple's iCloud
- Deletion: Deleting the app removes local data. iCloud data can be removed manually from iCloud settings
4. Subscriptions
The App offers auto-renewable subscriptions (monthly and yearly) to unlock Pro features. All payments are processed by Apple, and the App does not access your payment information.
5. Advertising