Hello,
I've just released a dictionary app for iOS based on Wiktionary data [1]
[2].
It works offline, it's free (as in beer), doesn't have ads and
integrates with the iOS Wikipedia app. However it's not
open source, although that is something I'm considering for later. I
haven't had much feedback so far so I'm really
curious if you find it useful in its current stage. The main intention
is to turn it into a tool for language learning, but it's
not quite there yet. It should already be useful as a general purpose
offline dictionary though.
Jan
[1]
https://en.wiktionary.org/wiki/Wiktionary:Beer_parlour/2017/July#mot.C3.AE.…
[2]
https://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=10461228…