I have a friend that teaches a yoga class. They prefer to have an old-school analog clock on their phone to monitor the time. They also play music through their phone to set the mood.
This app provides a simple and elegant solution to this need with minimal extra controls and complexity. It uses a high-contrast design for maximum readability, even in low-light conditions.
The app collects no personal information nor does it transmit any information to the developer or advertisers. The only permission that it uses is access to your music collection for playback. Without that permission, the clock function is still functional.