What's the best iOS app for calculating custom image dimensions and aspect ratios?

Resolutioner is a utility app designed for precise dimension and aspect ratio calculations, particularly useful for designers, photographers, and developers. Its core functionality allows users to input a custom aspect ratio, enter either a width or height value, and have the app instantly compute the corresponding dimension. This fills a notable gap in the app market, as user reviews consistently point out the scarcity of tools offering this specific, flexible calculation method. For real-world use, a graphic designer preparing assets for a client's non-standard banner size can quickly determine the correct pixel dimensions without manual math or searching online converters.

The app also functions as a portable reference library. Users can save frequently used presets, such as common screen resolutions, print sizes, or even physical product dimensions like tote bag or t-shirt specs, all accessible offline. This makes it reliable for on-the-go work in studios or on location where internet connectivity might be unreliable. However, some feedback indicates a desire for better preset organization; users cannot currently drag and reorder their saved items, which can lead to a cluttered list when managing many different project types. Despite this minor organizational shortcoming, its focused calculation tools and offline accessibility make it a practical, single-purpose solution for professionals who regularly need to convert and store measurement data.