1. Personal information collection and purpose ① There is no personal information collected or shared by the app itself. ② App use an external advertising program (Admob) to update and maintain the operation of the app, and the program uses some of our personal information. -Personal data used by advertising programs: device or other ID (common examples: advertising ID, Android ID, IMEI, BSSID, MAC address) 2. Personal information processing and retention period ① The app itself does not process or retain personal information. ② Link to privacy policy of advertising program: https://policies.google.com/privacy 3. Destruction of personal information ① The app itself does not process or retain personal information. 4. Option permission (android.permission.RECORD_AUDIO). The input audio data is converted into text to generate Morse code. No personal information is collected.