1. Note: + one star bump…I found the language selector menu translation are wierd thougg! Useful for me as I only need the fish mouth."Flat Pattern Bend" is a great free alternative app to this one.
2. The only down side to that app is ads, but it's a minor inconvenience compared to how useful that app is!It is not free, you have to purchase app for calculator.
3. Too much questionable Chinese (?) to English translation, confusing to use.
4. Numbers for lateral pipe joint look like they might just work though.
5. It gives you templates to all pieces to be cut and assembled.
6. It even has templates for auger/screw flights.