STOR (Square-to-Round) is a software application that enables tradesmen and sheet metal workers in the construction industry to design square-to-circle transformers. This app is a handy tool for designing hoppers, stove chimney hoods, and HVAC pipe work systems. The app is available for free on Android and comes with a pro version that costs 2gbp and can export dxf files. Moreover, the app is ad-free and does not require any in-app billing or cloud processing.

The STOR app is designed to meet the needs of the construction industry and assists tradesmen and sheet metal workers in designing square-to-round transformers. The app has a user-friendly interface and is easy to use. The pro version of the app can export dxf files that can be used for manufacturing. The app is ad-free, and there are no in-app purchases or cloud processing required.