Depending which industry you are working, there will always be moments when you need to do some simple formula mathematics for your work. Some of them are simple but the fact you need to repeat them again and again make you want to use an app to help you out.This app set off to consolidate all those simple formula into a single app. First release, there is Log/cylinder volume, pulley RPM + speed and Right angle triangle. Future release will incorporate more formula.Anyone interested to get their formula into the app for the next release can drop me an email.The application support English, Simplified Chinese, Traditional Chinese display.