全能调音器 (Tuner Star) is a versatile tuning app designed for iPhone users. Developed by Shenzhen Aiyunshidai Technology Co. Ltd, this free app falls under the Multimedia category, specifically Music & Radio subcategory.

With 全能调音器, musicians can easily tune their instruments with accuracy and precision. The app offers various tuning modes, including 12-tone equal temperament in C key, Eb key, F key, and Bb key. It also provides specific instrument tuning for guitar, bass, ukulele, and violin.

One of the notable features of 全能调音器 is its low-frequency response frequency, which can detect the G0 note (24.5Hz, 20Hz). The app boasts a high level of accuracy, with a tuning precision of plus or minus 0.1 cents. Musicians can also tune their instruments down by five semitones for a half-step down tuning.

The app offers four dedicated instrument tuners and supports three input methods: Bluetooth, microphone, and pickup. The display features a dual indicator, with a pointer and cent value, allowing users to easily visualize the tuning process. The A4 frequency range is adjustable from 415Hz to 460Hz.

Overall, 全能调音器 is a comprehensive tuning app that caters to the needs of musicians, whether they play wind instruments or string instruments. Its precise tuning capabilities and user-friendly interface make it a valuable tool for musicians of all levels.