Exactly the pixels the store asks for.
Every store wants its own set of dimensions, and they change as new devices land. Plinth keeps track of the numbers so you don't have to — pick a size, and your composition is fitted neatly inside it.
The same render, at any canvas.
Pick a size and the composition is letterboxed into it on your chosen background — nothing is cut off, nothing is stretched. What the canvas showed is what the file contains, down to the shadow alpha.
Three formats, three resolutions.
Background layer off, alpha preserved — the device and its shadow, ready to drop onto a website or a slide.
Background baked in, still lossless. The one the stores want.
Smaller files for the web, background forced on because there is no alpha to keep.
Pixel density on natural-size exports. 2× is the default, and the one most people never change.
A folder in. A set out.
Drop a folder of screenshots, style them all at once, or click one to give it its own look. Then export the lot and let Finder open on the results.
Ready to ship it?
Pick your size, hit ⌘S, and the file lands on your Desktop at the exact dimensions you asked for.