SaajTuner is a free iPhone application developed by Ranjeet Singh Devgun. It falls under the category of Multimedia, specifically Music & Radio. SaajTuner is designed to cater to the needs of musicians who play North Indian classical string instruments.

One of the unique features of SaajTuner is its support for multiple instruments, including Rabab, Dilruba, Taus, Sarangi, and Saranda. With a tuner chart suitable for various compositions in different ragaas, SaajTuner allows users to easily tune their instruments.

SaajTuner provides the flexibility to change the scale and display notes in either English or Gurmukhi. It also includes an auto-switching feature, which automatically moves to the next string once the current string is tuned correctly according to the tuner chart.

For beginners, SaajTuner offers multiple accuracy ranges to help them achieve precise tuning. The app also ensures smooth scrolling for a seamless user experience.

It's worth noting that while the included tuner chart is suitable for most performances, users can choose their preferred chart and tune their strings accordingly using the Manual Switching mode. In cases where a string cannot be tuned to the specified note on the chart due to excessive tightness or looseness, it is advised to consult a teacher or mentor for guidance. Additionally, users are reminded to be cautious as strings can break during the tuning process.

SaajTuner proves to be an invaluable tool for musicians playing North Indian classical string instruments, thanks to its comprehensive features and the contribution of Preetinder Singh Ji from SikhSaaj, who provided the tuning chart for all supported instruments.