HatchKeeper is free open-source egg incubation software, that is for the person who hatches his own chickens or other fowl. Its just a simple app, but it saves a lot of time with its automatic calculation features and makes keeping track of the eggs easy.
Visit the homepage at http://hatchkeeper.sourceforge.io/
HatchKeeper Mobile is now available on Google Play https://play.google.com/store/apps/details?id=com.hatchkeeperteam.hatchkeepermobile
This is beta software, so you might find...