I really don’t like the latest UX changes on Nextcloud and, combined with the fact I’m about to change VPS provider, I think I will eventually look into breaking down my Nextcloud app into specific individual ones.
Hence, I’ll be looking for a storage, a calendar and a note-taking app.
What are the preferred option from people for these three?
Hi @unmy
Decomposing Nextcloud is a reasonable approach if you want lighter, more focused apps. Here are some options available in the YunoHost catalog:
Storage / File Sync
Seafile (YunoHost app store | Seafile) - A reliable file sync solution with good performance.
Filebrowser (YunoHost app store | Filebrowser) - A much simpler option if you only need basic web-based file management without sync capabilities. Very lightweight.
Calendar and Contacts (CalDAV/CardDAV)
Baikal (YunoHost app store | Baïkal) - CalDAV+CardDAV server based on sabre/dav. Use external clients (Thunderbird, DAVx5 on mobile, etc.).
Davis (YunoHost app store | Davis) - Similar to Baikal but uses PostgreSQL instead of MySQL/SQLite.
SOGo (YunoHost app store | SOGo) - Heavier than Baikal but offers more features out of the box.
Notes
Trilium Notes (YunoHost app store | Trilium Notes) - Powerful hierarchical note-taking app focused on building personal knowledge bases. Supports desktop sync clients.
Many Notes (YunoHost app store | Many Notes) - Simple markdown-based note app with vault organization, similar to Obsidian’s approach.
SilverBullet (YunoHost app store | SilverBullet) - Alternative to Obsidian.
My_webdav
Baïkal or roundcube
Joplin
Thank you very much!
I was thinking that could be a viable option since it strikes a good balance and it has an Android app for mobile sync.
For this one I’ve bee actually thinking I should try the Calendar from Tuta since I already pay for their email, although I should check some reviews first. 
A bit like Seafile, I feel like this strikes a good balance and it also has an Android app, although I would be interested to see how they manage their files, if the Obsidian or Joplin way.
Oh, I use Joplin with Nextcloud as my syncing server. I’m not the biggest fan, but I wonder if I could just swap what I have with a new Joplin installation and let all the file persist?
I’ve also used joplin in conjunction with nextcloud then installed joplin server and changed the sync to a new joplin account on the server and it went fine (I’ve made a backup in case something goes wrong, apart from the automated backup)
Regarding Trilium’s file management: it uses a SQLite database to store notes (in a file named document.db), not plain markdown files like Obsidian. This is documented in the official FAQ (FAQ - User Guide) which explains why this design choice was made over flat files.
If having plain markdown files on disk is important to you :
For Tuta Calendar: it’s a reasonable choice if you already use their service, but does it support CalDAV?
Very good to know, thanks! 
Ouch! Thanks for letting me know. I will skip it then.
They don’t seem to have an Android app, unlike Joplin, do they?
Not sure, but why?
It depends on what you need, but I’d go with Baikal+Seafile if it’s just for a personal account.
Don’t worry too much about “native android apps”, sometimes they’re not good at all, but you can use something else like RSAF and Davx5.
And for note taking you should check which one suits you, all are good.
I’m asking because I use DAVx5 on my smartphone to sync my calendars and contacts. The *DAV protocols (CalDAV/CardDAV) are therefore important to me as they allow standardized synchronization with any compatible client, without depending on a specific proprietary app.
They don’t for the same reason they don’t support IMAP/POP3/SMTP, because, as they say, it would compromise their encryption.