Probably the best app out there for an Arabic-English dictionary, though its no Hans-Weir. The fact that its offline makes it incredibly convenient (and fun!). What would push my rating to a 5 is the inclusion of diacritics on 1st declension words (without being dependent on internet access to wordreference) and prepositions that go with the verb (and how they change its meaning). The games also crash on my phone. Still, a solid app.
Decaturator about Arabic Dictionary +