This app helps children learn to read piano notes on both the treble and bass clefs. It features real piano sounds and interactive quizzes where kids tap keys to identify notes on the musical staff.
Kids Music Note - Learning Pad by rf Zhou





14+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our rf zhou list covers 14+ iPhone apps updated through May 2026. Compare ratings, prices, and screenshots in one place.





This app helps children learn to read piano notes on both the treble and bass clefs. It features real piano sounds and interactive quizzes where kids tap keys to identify notes on the musical staff.




Listen to a vast collection of audio dramas, including popular novels and comics adapted into audio. Enjoy content for sleep, relaxation, and entertainment, with live voice broadcasts and interactive features.




This utility app helps engineers and students calculate and convert RF-specific values like impedance, wavelength, and return loss. It also includes a calculator for comparing RF cables and assemblies, and provides access to product catalogs and branch information.




This application is a time tracking solution for small drone racing events. It is part of an open-source DIY project that provides hardware and software for accurate lap timing.


Access a vast collection of Chinese radio stations, offering diverse music genres, podcasts, and audiobooks. Discover your favorite artists and songs with this free, all-in-one music streaming application.


Listen to Chinese FM radio stations from across the country. Discover recommended broadcasts and explore stations by province and city. Enjoy a wide selection of Chinese radio content.


Securely store private photos, videos, and diary entries exclusively on your device. Features include password protection, a fake password option for privacy, and an AI assistant for creative tasks. It also offers private messaging and tools for tech-savvy users.


Control remote vehicles in real-time using a mobile device over 4G/5G networks. Stream video, audio, and control signals for an immersive driving experience without distance limitations. Claim vehicles by scanning QR codes and manage direction, throttle, and speed.


This app is a social network for online game assistance, offering daily game trends and practical information. Engage in discussions on various topics, from gossip to game strategies, and connect with other users in real-time chat rooms. Enjoy a convenient mobile experience with features like notifications, posting, and file uploads.





