I've been a Nucleo icon pack customer for almost two years. I love the icon transitions they include with the purchased icons, but the options are too limited. This allows anyone (even non-Nucleo icon customers, I assume) to create their own. I'm already using it for some personal projects.
After they update the app, they change the pricing and the plans.
This make me lose access to icons files (they say the subscription just for the app)