Na serveru Slunečnice.cz je zajímavá iOS aplikace:

Poles 1.0

Poles makes calculating the amount of concrete required for a given hole size and pole size a breeze. This is very useful at the end of the day when you need to order that last concrete truck. No more trig calculations for many hole sizes and pole sizes and hole depths. Poles does it all. Poles…

Adresa: https://www.slunecnice.cz/sw/poles/