hi-5 from me 4 him!
Thanks, I got permission from the original author (thanks Patrick Schwarz) to relicense it from GPL to AGPL thus enabling me to put it into the App Store. I also put it into a repository in Github so it won’t get lost in the future because until now it was only listed on the old dead undead (?) Owncloud app store.
If somebody likes to add a feature, pull requests are welcome!