The most expensive app currently available on the App Store is CyberTuner , priced at $999.99. CyberTuner is a professional piano tuning app designed for piano technicians, offering precise and reliable tuning capabilities. It was developed by Reyburn Piano Service, Inc. and has been highly valued by professionals for its effectiveness and usability. Users also pay an additional $79 annually for updates

. Other apps also share the $999.99 price point, such as VIP Black , a luxury lifestyle app for high-net-worth individuals, and BarMax CA , a comprehensive bar exam preparation app for aspiring lawyers

. Historically, there was also an app called I Am Rich released in 2008, which was priced at $999.99 but was removed shortly after release. It had minimal functionality and was more of a status symbol than a practical app

. In summary, CyberTuner stands as the most expensive practical app currently on the App Store, with a price of $999.99, targeting professionals in piano tuning