Editors' Note: The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
Ratios for iPhone application compare ratios and solves for proportional unknowns. It also solves for unknowns. From comparing special offers to scaling recipes, budgets, or material lists, this app allows ratio problems to be solved as they appear. It is a simple application that can quickly pay for itself while making ratios user-friendly.