Thank you for your reply.
@mikelove, I tried it and that seems to be exactly what I need...
Shame on me that I still did not explore the complete configuration settings and many other features in Pleco. Somewhere I read that Pleco flashcards are not meant for learning sentences. But now I wonder if that information was probably outdated because it referred to an older version. I'll just give it a try in the next days.
@Shun, thanks for the clarification. I also believe Pleco would be the best solution for me, maybe I just need to know more about how to use it correctly - at least it promises less back pain and eye strain after my 8-10 hours office job at the desk than sitting at home in front of my computer. I believe in the meanwhile I also discovered the radical for a character in Pleco, and how to find more characters based on this specific radical, as well as compound words with this character. That almost replaces the features that I liked so much in Clavis Sinica. Fortunately I did not yet buy it and only tried the demo version - what held me back was their crappy looking flashcards, review exercises and editor... I think the "Add to flashcard" feature in Pleco is pretty convenient and much better if I get used to the flashcards; and I believe sooner or later it will also replace Anki completely (for Chinese only, not for other purposes). Then I still consider to use Dimsum only for typing longer texts more conveniently on the larger PC keyboard or annotating text if needed, and (maybe) the Chinese Text Analyser for showing me the still unknown words in a text or extracting a complete list.
Next I'll experiment with synchronizing my old Nexus 7 tablet with my phone via backup/restore by using DropSync or FolderSync or saving directly into Google Drive. If the backup contains the flashcard scores that should be perfect.
I am sorry, if a part of this post is a little bit off-topic.
