Touch Waves vs Projectile Lab by ChatStick

Touch Waves is an educational application helpful for a high-school or university course of wave physics. It contains not only a memorandum of the basic equations, but it also contains approximately thirty animations (some in 3D) illustrating the various concepts of wave physics. More than 70 screens of wave physics! For teachers !! Connect your iPad to a video projector and show the animations to your students in classroom. List of covered subjects: Vibration: Harmonic oscillator, damped oscillator, driven oscillator. Wave on strings: Introduction, reflection and transmission, standing waves. Acoustics: Introduction, reflection and transmission, Doppler effect. Optics: Geometric optics, wave optics, polarization, Jones formulation of polarization, reflection and transmission, interference, diffraction, Doppler-Fizeau effect. Each section contains at least one animation. List of animations: Motion of harmonic oscillator, Motion of damped oscillator, Motion of driven oscillator, Progressive transversal wave, Reflection and transmission on string, Standing waves on string, Progressive longitudinal wave, Beating wave, Acoustic frequency, Acoustic Spectrometer, Acoustic Doppler effect, Snell-Descartes’ law, Law of spherical interface, Law of thin lens, Law of thick lens, Law of spherical mirror, Geometric aberration, Chromatic aberration, Visible spectrum, Electromagnetic wave in 3D, Electromagnetic spectrum, Absorption and emission of photon, Types of polarization, Types of polarization in 3D, Fresnel’s coefficients, Reflection and transmission in 3D, Degree of polarization in reflection, Interference in 3D, Young's interferometer, Michelson's interferometer, Fabry-Pérot interferometer, Diffraction by rectangular aperture, Diffraction by circular aperture.

Projectile Lab is an interactive physics learning app that helps students understand projectile motion by doing, not memorizing. Build intuition with a real-time simulator, then deepen understanding with formula breakdowns, graph analysis, guided practice, and challenge levels. WHAT YOU CAN DO - Run live projectile simulations with adjustable angle, velocity, and launch height - Explore gravity environments including Earth and Moon (plus more with Premium) - View trajectory stats instantly: max height, range, flight time, and speed components - Learn the math with step-by-step formula sections and substituted values - Analyze motion with time-based graphs (height, distance, velocity, speed) - Practice with curated physics questions across multiple difficulty levels - Play challenge missions: hit targets, clear obstacles, land in zones, and maximize range - Save experiments to revisit and compare your best runs - Track progress through stars, streaks, and achievements DESIGNED FOR LEARNING Projectile Lab is built for students, self-learners, and educators who want a clean, focused environment for understanding motion. The app combines visual intuition and equation-level reasoning in one workflow. PREMIUM (ONE-TIME PURCHASE) - Removes ads - Unlocks all challenge content - Unlocks unlimited saved experiments - Unlocks all environments and advanced controls - Unlocks graph insights and full practice access No subscription required.