wk has still not developed an app for any platform
but if you went with this:
[Android] Smouldering Durtles (v1.1.1) - native app with offline lessons and reviews, plus themes and script-like features! - WaniKani / API And Third-Party Apps - WaniKani Community
you can set the max reviews per session (I believe) which would probably address the issue
also lots of other nice features like UNDO and ANKI mode 