Currently, the software is free to use for up to 10 recipes. You can import your Beersmith BSMX files, but this is limited to 10 recipes as well.
Once I'm content the software is ready for wider release, I'll open up some subscription tiers and accounts will likely switch to subscription/short trial only. Subscriptions mean I'll be able to continue to devote time and energy to developing Beercat, giving you a better product in return.