Okay, cloud saving, custom items and companions for a single payment of 4.50 EUR. But you can completely disregard the rules and freely give skills, spells and feats with the free version. The app is very well maintained, gets updates at least monthly. They were so fast with the implementation of the remaster. I'd love to gift the app to people in my group, who are struggling a bit more financially, but Google doesn't have a functionality like that unfortunately.

It's not available yet on iOS (though an iOS port is in development). You can find it on the web at pathbuilder2e.com. Mobile and web apps don't sync, though. The paid versions allow you to save characters to Google Drive, which you can use to sync them.