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J.J.J. Studio

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About this app

Recording — Start recording with a single tap, and utilize the pause and resume features for longer recordings. Four audio quality options are available: Low, Medium, High, and Highest. Each option displays an estimated file size per 10 minutes, allowing you to select the quality that best suits your needs. Real-time waveforms update approximately every 200ms, providing a visual check of volume changes during recording. If you set a timer, recording will stop automatically after the specified time has elapsed, with the remaining time displayed on the screen.

Library — Recording files are displayed in a list format where you can see the date, time, length, and size at a glance. File names are set to the recording start time (YYYYMMDD_HHMM) by default, but you can change them to your preferred name. Long names are neatly shortened for display. You can search by file name or sort by date, name, length, or size, and add important clips to favorites for quick access.

Playback — Navigate conveniently using play/pause and 15-second skip forward and backward features. For recording lectures or meetings, you can adjust the playback speed from 0.5x to 3.0x in 0.1x increments. You can move to your desired position by tapping or dragging while viewing the full waveform, and check the playback status via the current position and the progress bar at the bottom. The elapsed time and total time are updated in real-time, and when playback ends, the file returns to the beginning for easy replay.

Sharing and Organizing — You can share recording files with their filenames to other apps (messenger, email, cloud, etc.). A confirmation process is required when deleting files to prevent accidental deletion. Canceling a recording cleans up related files, helping you keep your storage space tidy.

Interface — A consistent dark theme is applied to reduce eye strain. The title is placed in the center and the back button is on the right, making it convenient to operate with one hand. On the recording screen, you can easily check the current status through a large red record button, a highly visible recording time, and a clear audio quality indicator. The playback screen places all major controls on a single screen without scrolling, with appropriate spacing to enhance readability.

Privacy — We do not collect any personal information. Recording files are stored only in your device's internal storage and are not uploaded externally. You can review the privacy policy within the app or contact the developer. Developed with Flutter for Android and the web. The web version provides a virtual recording feature for testing, while high-quality audio recording is possible on actual devices.