Not free and you can't even try it without signing up.
The apps works well for me, support (which is needed to create your specific aircraft) is very quick. I use it regularly. My aircraft has a weight and balance impacting STC, they also set this up.
Not free Free app that is not free.
Full Feature W&B App We have used eFlite for years and eFlite Mobile is definitely the best FAA/EASA compliant weight and balance app for Android devices. It only took seconds to import our aircraft modules and now we can perform calculations from anywhere: no Internet connection required. Weight and balance records for each flight can be signed, emailed or printed and saved to the device in case we get ramp checked.
Updated user interface so it's more user-friendly especially when the device is in Landscape orientation. Fixed misc. bugs.