[tomsem]

[In case KM is still an active project]

Kindle Mate is overkill for me: I have no interest in doing anything with My Clippings, and my sole use case is to have a tool which collects and syncs Vocabulary Builder data between my Kindles (something I have long wished Amazon would get around to doing). I don't need it to do any more than that (e.g. add definitions and offer UI).

Windows is also inconvenient. My netbook (remember them) barely runs Windows 10. Another, poor thing, spends hours every time I turn it on doing updates before I can do anything useful with it, with its loud fan going all the while. 12 years ago, it was a screamer, even after it updated to Windows 10. What happened? It won't tell me.

Have you considered developing calibre plugins for some of this? It would be platform neutral and these might find a larger audience.

Thanks.