2x for the quick bump, 4x for the sizes that actually get scrutinizedUp to 4x resolution, without the smudging a plain resize causes
Most of the time an image only needs to be a little bigger, a thumbnail that has to sit next to sharper photos, a screenshot that needs to read clearly at a larger size. 2x handles that in one step.
Print, packaging, large-format signage, and high-DPI displays are less forgiving, every softened edge and smeared texture becomes visible at that size. 4x is built for exactly that case: it's the tier SparkStation's own in-product guidance points to for "print-ready or high-DPI outputs," not just a bigger export.
Quick resolution bump
For web use, feed thumbnails, and anywhere the image just needs a little more room to breathe.
Print-ready & high-DPI
For output that has to hold detail at a larger physical size or a denser pixel grid, the tier built for scrutiny.
Batch variations
Set an output count and generate more than one upscaled version of the same source in a single run.


