SkyLetter vs Space Particles

【Deliver your message in the cloud】 "SkyLetter" is an application that draws a message in the sky with contrail. Look up at the sky after entering the message. The airplane which received your message there draws a message with a trail of contrail. Why don't you draw in the sky the names of you, your friends, and the messages you want to convey? You can share it as a video or photo on social media. Let's take a photo that is drawn message and send it to many people. 【Recommended environment】 Support for iOS12.0 or later / iPhone 6S later. If your device is under iOS 12.0, please update and install.

Space Particles is a touch-driven visual sandbox for exploring motion, gravity, and light. Start with a live field of glowing particles, then shape it with gravity wells, repulsion, pulses, stir tools, vortices, and erase or freeze interactions. Switch between presets like spiral galaxies, binary systems, collisions, rings, streams, lattices, and nova-style bursts, or tune the simulation yourself. Particle Mode focuses on gravity-driven motion and emergent patterns. Firework Mode turns the same canvas into a configurable spark launcher with adjustable spread, trail length, gravity, drag, color, size, and lifetime. Built for quick experimentation: - Touch and drag directly on the canvas - Choose particle counts, speed, bounds, trails, colors, and visual themes - Toggle between performance and quality settings - Capture screenshots of scenes you create - Share scene links from the web version Space Particles is for anyone who likes visualizers, creative coding, particle systems, physics toys, generative art, or just watching a screen fill with organized chaos.