Pump a playground swing yourself and watch the folk recipe fail: squatting in time with the swing adds exactly nothing, squatting twice per swing sends you to the 90-degree limit. Independent reimplementation of no product in particular; the physics is credited to Curry (1976), Tea and Falk (1968), Burns (1970), Case and Swanson (1990), Case (1996), Post et al. (2007) and NIST DLMF 28.6. Runs entirely client-side.

Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.