iOS has filters and drawing apps up the wazoo, so it can be hard to see the point of new ones. But Isometric allows you to create and manipulate designs and optical illusions that are weirdly ...

If you’ve ever held a plank, paused at the bottom of a squat or pressed your palms together in front of your chest, you’ve done an isometric exercise. Ta-da! These holds might look simple — after all, ...