Clef Trainer Grid vs Vector3D

Learn to read sheet music over various clefs! Practice reading and inputting notes using your finger, plugging a piano keyboard in, or virtually any other instrument using the microphone input mode. Take your skills outside of the app: Clef Trainer Grid also features a special grid input that scrambles button locations to prevent the building of a muscle memory. This ensures that you're actually learning the note letters, rather than just learning how to use an app! Still want to learn the piano keys? No worries! You can also switch a classic piano input at any time. Features also include: * Support for treble, alto, and bass clefs * Support for every major and minor key signature * Support for accidentals—Choose if you want to play outside of the key! * Adjustable number of ledger lines * Cheat Mode—View the names of the notes in real-time! * Dark Mode * Ghost Note —View miss-input notes on the staff

Vector3D: Math Plotter brings your math to life — plot vectors, points, and line segments in interactive 3D space, right on your iPad or iPhone. Whether you're a student tackling linear algebra, a teacher preparing classroom demonstrations, or a physics enthusiast exploring 3D geometry, Vector3D gives you an intuitive tool to visualise mathematical objects the way they really look. FEATURES • Plot vectors with custom start points, components, colours, and thickness • Visualise points and line segments in full 3D • Display vectors in i, j, k notation with automatic magnitude calculation • Labels follow each object in 3D space for easy identification • Adjust axis and grid size to fit any scale • Save scenes as .vviz files and reload them anytime • Share scenes via AirDrop, Files, or any app • Capture and share screenshots of your 3D scene • Dark mode and light mode support • Available in English, Traditional Chinese, and Japanese • Works completely offline — no account required, no data collected FREE vs PRO Free: Plot up to 10 objects per day, save up to 3 scenes Pro (one-time purchase): Unlimited objects and unlimited scene saves PRIVACY Vector3D collects zero data. No analytics, no ads, no tracking. Everything stays on your device. Perfect for: • High school and university students studying vectors, linear algebra, or calculus • Math and physics teachers creating visual aids • STEM learners curious about 3D geometry