The useage of my PC would be so much easier if there was a way to copy and paste links, notes, scripts, etc to a notepad from my Android (Samsung phone) and open them on my PC with a simple click of an icon. Is there a cross-platform notepad app for Linux/Ubuntu AND Android, please?
I searched Snap Store and the Ubuntu apps with no luck and Google gave me loads of false answers and wasted my time.
I'd go for "ease of access" over security (I'd rather not have to enter passwords every time I open it). There is absolutely nothing personal on the PC, I'll just be sending instructions to myself as I'm only using it to learn more about computers.
Joplin is great open source, cross platform notes app for all major PC and mobile platforms. It supports markdown and tags.
It's also on the snap store. The Joplin-Desktop by james-carroll is actively maintained probably the one you'd want. The snap store also has a command line variant. Outside of the snap store, it's on flathub, and as an AppImage from their website.
You can host your notes locally on your PC, your own Nextcloud instance, or through something like Dropbox.
The interesting question here would be : where should you put your note to be able to edit it from either your laptop or phone ?
I can imagine 2 different scenarios :
In both cases, there is the note as itself, a file or set of files that is stored somewhere. If you go for proprietary solutions such a Google Keep, you won't even notice the file format. And there is the app to edit the file. Don't focus too much on the app, it doesn't need to be multiplatform if your aim is just to shared notes between devices ;-)
So, per your comment, let me make a suggestion a bit more accurate and arbitrary...
If you don't have one already, you can set up a Nextcloud account at one of the Nextcloud providers (you can click on "Change provider" to see the full list).
Synchronize your Nextcloud on both your phone and PC with the Nextcloud clients.
Then on your phone, you can use the Nextcloud Notes app to edit your notes. That will be your direct icon app.
On your computer, you only have to edit text files in the
<your-synchronized-nextcloud-folder>/Notes
path. Any text editor can make it. I like QOwnNotes for this purpose (in your case, you would have to tell QOwnNotes to use<your-synchronized-nextcloud-folder>/Notes
as folder path), but Joplin or even Gedit can make the job too.I hope this helps :-)
Did you tried Simplenote ? It has Web, Linux, Windows, Mac, Android, and iOS support.
Pretty simple interface with a minimal useful feature sets-
It is from the makers of WordPress (Automattic) and is open source(Github).