Coniuno is a freely available, cost-free software.
The Software can be used for unlimited time on as many devices as you wish.
Parts of the Coniuno PC program's functions are available on the Coniuno homepage. You can use these functions unlimitedly.
To personalize your training, you can create an user account on the Coniuno homepage.
Coniuno is a hobby project, is privately financed, and lives from a large amount of invested spare time.
If you like the program and want to contribute to its further development, I would be happy for a voluntarily donation.