The developer of Oxford University Press has currently removed five apps from the app store.
oxford learner’s Academic dict x 2
oxford wordpower dict
practice english usage 4ed
oxford quick reference grammar
I recommend that my classmate buy the three apps that were available last year, but they have all been removed by the developer now. These apps include the LDOCE Plus app made by Enfour, a Japanese software company, the Oxford Practice English Usage 4th Edition app made by OUP, and the Oxford Quick Reference Grammar app made by OUP.