SuperLux

SuperLux is a refreshingly narrow tool in a world of bloated editing suites. It does one thing — AI image upscaling — and does it well, with a clean, ad-free interface. For $2.99 a year, it's a steal for AI art enthusiasts who regularly need to enlarge 512x512 generations for printing. The two-tier upscaling (Super up to 3x, Ultra up to 12x) gives flexibility, and 14 aspect ratios cover most use cases. Where it bites: it's iPhone-only, so no desktop or web access. Some users report crashes on recent iOS versions — a recent review (June 2025) mentioned the app failing immediately after selecting an image. That's a red flag for reliability. Also, batch processing doesn't exist; you're doing one image at a time. For professionals needing bulk upscaling, this won't cut it. Compared to alternatives: Apps like PixAI 4X or ImageX offer similar upscaling but often include ads or free-tier limits. SuperLux's subscription is cheaper than most (less than $0.25/month). However, those apps may be more stable or offer batch features. If stability is critical, test SuperLux with a free trial before committing. In practice, we'd reach for SuperLux when we have a handful of AI art pieces to print on a whim. It's not a workhorse; it's a polished utility. The developer, Scenery LLC, also makes Creator: AI Generated Art, so there's integration potential. Just be aware of the crash risk — we'd check recent reviews before buying.