Apps
Buchen
Buchen is a bookmark manager available for iOS, iPadOS and visionOS, with an aim to give you full control over your bookmarks. With plenty of features aimed at helping you curate your bookmarks and the ability to search across bookmarks, tags and folders, the goal is to give you the tools to deal with your links in a way that suits you. If you need to get your bookmarks into other apps, there are open export formats that will help you with that. Buchen is completely free with no subscriptions.
Read more about Buchen's feature set.
Support
If you need help, you can try the support page (available in English or German) first. If you can't find the answer you are looking for, then send your query via email.
Plan Poke
The Plan Poke finger / name client for iOS, iPadOS and visionOS that brings this classic networking feature onto mobile devices. Plan Poke is completely free with no subscriptions.
If you don't know what fingering is about, you can read up about the finger protocol and if this sounds interesting you can create your own account on happynetbox.com by Ben Brown.
This client will work with any finger server. happynetbox.com is not mandatory but it is a modern take on the service and a great way for new comers to this protocol.
Read more about Plan Poke's feature set.