Cello Tuner Professional is a high-quality app designed specifically for cello players to tune their instruments with precision and ease. With its accurate sound frequency display in Hz, this app ensures that your cello is perfectly tuned every time.

The app offers a wide range of calibration options, including A: 392Hz, 415Hz, 432Hz, 440Hz, 441Hz, 442Hz, 443Hz, 444Hz, and 466Hz, allowing you to tune your cello to your preferred frequency. It also boasts instant load and the fastest tuning, making it optimized for the latest iPhone devices.

Cello Tuner Professional provides the highest responsiveness and sensitivity, ensuring that even the slightest adjustments can be detected. The intuitive user interface with LED tuning indicator makes it easy to use, and the visual indicators let you know when each string is perfectly tuned.

This universal app works seamlessly on iPhone, iPad, and iPod touch, making it accessible to all cello players. Additionally, the app offers advanced settings for A4 calibration, mic sensitivity, sound notifications, and even a tuning fork, which can be purchased as in-app upgrades.

Users have praised Cello Tuner Professional for its usefulness and accuracy. They describe it as an outstanding and well-spent investment, with one user stating that it is a must-have app for all cellists. The convenience and suitability for players of any skill level have also been highlighted.

Please note that microphone access needs to be granted to this app when prompted. You can find this option under Settings > Privacy > Microphone. For any ideas or questions, the developer encourages users to provide feedback through their website or by emailing