Buttonboard vs Optic Illusion

Tap a button, hear the sound. Buttonboard is the fastest way to drop the perfect meme, reaction or sound effect into any moment. OVER 9,000 SOUNDS Memes, viral clips, games, movies, TV, anime, music, pranks and classic sound effects, organized into categories and shuffled every time you open one, so there is always something new to press. FIND ANY SOUND IN SECONDS Search every category at once. Search ignores accents and capital letters, so you find what you're looking for even if you don't remember how it's spelled. YOUR OWN SOUNDBOARD Tap the star on any button to save it to Favorites. Your go-to sounds stay one tap away, right at the top of the app. SEND SOUNDS TO YOUR FRIENDS Touch and hold any button to share the sound as an audio file through your favorite messaging app, email or AirDrop. MADE FOR IPHONE AND IPAD - Plays even with your phone on silent, without stopping the music from other apps - A new tap restarts the sound instantly, just like a real button - Bigger grid with more sounds on iPad - Light and dark mode Buttonboard is free and supported by ads.

Optic Illusion gathers 72 optical illusions for you to explore. Every one comes with a direct explanation of what your eyes and brain are doing to cause the effect. 33 interactive, 14 animated, and 72 illusions in total to explore. Written for curious humans. WHAT'S INSIDE • Motion: a still image that drifts, dots that turn into a walking person, a spin that refuses to go round • Geometry: the Café Wall, a spiral that turns out to be circles, two lines your ruler disagrees with • Depth: impossible objects, ambiguous corners, and a room that is the wrong shape on purpose • Contrast: Adelson's checker shadow, and grays that will not match no matter how long you stare • Color: afterimages, a gray picture you will see in full color, and a black-and-white disc that spins up colors • Form: edges, surfaces and whole objects that were never drawn • Attention: five demonstrations of what you are not seeing right now MOTION AND FLASHING Some illusions are in motion, and a few have a flashing/strobing effect. These are protected with a warning that names what the effect is before anything plays. Free. No in-app purchases, no ads, no accounts.