Something to think about, if it’s important to you. I went through this same journey. I had been using Day one, which is a beautiful app. But I began considering what would happen to those entries when I’m dead and gone. It’s important that my wife and kids can read through the years if the desire. That lead me in a search for something that has the most “future proof” journaling approach. Something that would still be easily readable without a bunch of exporting or conversion should the company go out of business.

Obsidian is one of many apps that at its core, is simple text files in folders on your local machine(s). As others have said you can self host rather than paying for their home grown sync solution. I’ve tried Joplin, Logseq, Trillium, Memos, and I’m sure there are others I’m forgetting. They have all had some level of dealbreaker for me. Like Logseq has a horrible android app. Memos stores entries inside a database, so not easily retrievable. And Joplin adds meta data to the contents of your text files as well as screwing up the file/folder names to something that isn’t human readable. So I’ve stuck with Obsidian. It’s not open source, but the file format is platform agnostic and can be read by just about any computer or mobile device made in decades.

That said, you won’t get the calendar features with dates/locations of photos like you mentioned unless someone has made a plugin for it.

I’ve found the PWA adequate for my phone usage. I found a custom CSS that is sort of a Gruvbox that I really like.

Miniflux is great. I use Wallabag as my read it later app and selfhost both on a cheap VPS. They’re tightly integrated but Miniflux supports several other integrations

Honestly it seems like Obsidian is the one matching most of your criteria. $4/mo isn’t bad for a bullet proof sync solution with version history, imo. I also have my vault backed up on each client locally for extra protection.

I’d love to suggest Logseq because FOSS, but man does the android app suck.

That said, I find Obsidian really lacks in the simple to-do/checklist function. So I use Quillpad synced to my Nextcloud server for Google Keep-like functionality. Everything else goes into Obsidian.

I have used Nebo as well and instead of exporting I did a select all, copy and paste. Not very elegant but it did work to sort of “convert” to markdown.

And the file names are not the note titles like Obsidian (and logseq I believe)

Hey! That works. Not sure how I missed that. Thank you!

Don’t know if you saw that they added a $4/mo tier for Obsidian Sync. I thought $8/mo was too high and went to cancel it and saw the cheaper price. For how well it works as far as speed and reliability of syncing with version control, it’s worth that for me.

Yeah, it’s not perfect. I’ve noticed that when making a task list/checkbox note that you can’t delete the line. Sure you can go and edit the contents of that line, but even if you delete all text, the line with a checkbox remains. Kind of annoying, particularly when I accidentally create another checkbox and have nothing to put in it. it’s just an empty line and checkbox sitting there mocking me. You can still mark it complete of course, but it kinda makes my eye twitch. :)

Yes, that’s how I’m using it. NextcloudPi on a Pi 4. It’s been working really well for me.

It puts completed items at the bottom of the list, if I understand what you’re asking

I’m using Quillpad

Memos is self hostable and is “cross platform” by nature of being web-based only. There is a 3rd party mobile app MoeMemos but it doesn’t add anything special over the quite excellent progressive web app for plain Memos. Of course you can’t use it offline since it’s web-based. But I have an always on VPN connection between my phone and my server so home so it’s fine.

Notesnook is recently open source, but as of yet not self hostable. It is on the roadmap though. This one is privacy/security oriented and has native apps for just about everything as well as a web interface.

Quillpad is the closest interface-wise to Keep, but it can only sync with Nextcloud and I can’t run that beast on my old hardware. Too clunky and slow.

I’ve been on this hunt for awhile but I realized that I use Keep differently than other folks on the same journey. It’s mostly a list focused service for me. Sometimes with check boxes, sometimes not. Most of the FOSS not taking apps can use some markdown, but that is a bear to use on mobile without a quick way to inject a checkbox. Memos has a button for a few formatting items on each “post” and thankfully one is the Markdown checkbox shortcut.

For notes, personal knowledge management, and everything else I use and love Obsidian.