I really liked this idea, so I tried making it a reality. I'm a QML/Kirigami newbie, so neither the UI nor the code look amazing, but – it works!
https://github.com/NicoWeio/Produktive

So cool!

Really cool!

First feature request:

Time tracker apps can be a bit uncomfortable to use because every time one looks at them, it is a bit like some relative is telling you to get a grip of your life and stop lazing around.

So true to the KDE slogan "Be free!" I have a semi-serious proposition:

Have a toggle for "Lazy Mode" which does the following:

• Changes the red "Distracted" colour to be rainbow-coloured
• Changes the green "Productive" colour to a more neutral colour like e.g. blue
• Changes the window title from "Produktive" to either "Prokrastinate" or "Prokrastinator"
• Changes the label "distracting" to "enjoying life"

I actually think this would improve the application and make it more unique even if this idea is based on a joke I made in the visual design group chat. Some users might be interested in a time tracking application that doesn't seemingly judge them for how they spend their time.

Another note: There is a quite nice but less pretty KDE time tracking application already called KTimeTracker (https://invent.kde.org/pim/ktimetracker). If you would add your nice UI to it as an alternative (and maybe new default) view mode, you'd get your work immediately in front of a bunch of users and you wouldn't need to worry about your work getting lost once you stop working on Produktive.

Nice suggestions, @felixernst!
Since my semester break is about over, I won't be able to do much about them for some time, though.
Also, let me cross-link some related mockups by @aronkvh: https://phabricator.kde.org/T14933

Also, let me cross-link some related mockups by @aronkvh: https://phabricator.kde.org/T14933

Oh, right. I had forgotten about these. I linked back from that task to this page too so everything is connected.