Counterpoint: A web service is one thing to maintain that then works on all devices, including mobile. A PDF tool needs to be installed.

That is a good point in the world of ipad, android, and iphone. But did you know that iOS has most of these features built in? I just discovered this now.

I'm running this in a container on my nas. There isn't anything to maintain with tools like this. If setup, properly - they keep running unless stopped. They can even be auto-updated when their is a new image. I have several types of utility apps I'm self-hosting. I rarely have to do anything other than keep the OS updated.

What nas system do you use that runs containers? I tried the whole container thing and have to reboot my system every week

You had to reboot your system every week because you tried a container?

Unraid is nice, and pretty easy to maintain. You get a web interface and can set up auto updates. There a many different applications in their app store, too, or you can make your own using plain docker.

Just plain ubuntu server and docker installed. I use Portainer to manage the containers. Container images are updated automatically using watchtower.