The 0/0 Streak Challenge

You can’t use the scripts on your phone but there are apps made by wanikani users for doing reviews on your phone.

If you have an iPhone the app is Tsurukame, for Android it’s Flaming Durtles. I use an iPhone so I can only talk about Tsurukame but it has some of the features from scripts built into the app functions such as an undo button.